Re: Tbi swap build thread
 

Thanks my good man.:smoke:

Re: Tbi swap build thread
 

Nice progress.
FYI - do not forget to use EFI rated fuel hoses clamps when plumbing your system. Even though TBI system is rated for 13 to 15 PSI operating many pumps are capable of delivering 30+ when deadhead.

So, what's on your XMAS wish list??

//RF

Re: Tbi swap build thread
 

What fuel tanks are yall guys using? I got my engine out of a van and that tank is too large, but the fuel sending unit on it is new a was hoping to use the unit. Just wondering what you guys are doing?

Re: Tbi swap build thread
 

Thanks, Pick-up EFI hoses today but I am having a hard time finding the clamps for some reason. But the parts store I usually buy my parts from was closed today so I will check with them Friday.(I am sure they will have them) Also picked up a new pump to put in my tank this morning.
Thanks Jamie

Re: Tbi swap build thread
 

I am using a used tank off of a 87 truck. you can use a frame mounted pump like some others have done on this thread. I am using the EFI tank because I have it and I want this to be a low buck swap. ;)

Re: Tbi swap build thread
 

Yep, me too. I am using a 1987 TBI fuel tank as well. The frame mounted pump didn’t work so well on my ’78 but on the ’72 it is working find so far.

Hey, Jamie… I have a few of those EFI hose clamps left over. The cheap Chinese hose claims I found at Autozone and Checker scared me as they were so flimsy so I wound up buy a box full from Napa. I’ll email you a few...:lol:

Re: Tbi swap build thread
 

I second this as well - worst yet the garbage Chinese made hose clamps are prone to rust through - I had several fail before. A while back I took the failed clamps to my failure analysis engineer for failure analysis. He told me that they used 'pot' steel and cheap cadmium plating to make it look shiny. Once the set screw striped off surface plating rust started immediately. It's a good thing we found in time during our annual maintenance cycle. End up getting some Ideal clamps - these are wider (5/16") than normal hose clamps and have beveled edges and solid clamping face that does not bite into the rubber hose. Look for them in specialty industrial supply places or online.
http://www.autobarn.net/iddifuincl.html
If you are really serious (or paranoia) - use marine grade 304SS clamps - but these are very expensive for automotive use and will last a long time!

//RF

Re: Tbi swap build thread
 

I have had bad luck with the cheap clamps and DO NOT use them any more. I will hold off a few days untill I can get some real ones at the good parts house here in town. ( but thanks for the link for auto barn i will check them out.):D
I hardly buy anything anywhere else in town unless it is after hours and I HAVE TO. I hate the cheap crap,.. you waste your time and money with it.

Larry if you can find out a way of E-Mailing those clamps go ahead and send them. ;) :lol:

Thanks, Jamie

Re: Tbi swap build thread
 

Well I got a little futher along today. I finnally got all the under hood wires and under the dash wires run.
I droped the stock tank and, it is a good thing I did it was just about to rust through. I changed out the old stock pump in my EFI tank with a new pump and, ran my lines from the tank to the switching valve. Also ran the lines along the frame up to the throtle body.

I pluged in my cluster and wired my Check engine light and turned on the ignition and presto all my lights worked:metal:.

All I like now is installing my EFI tank, wire the pump, change the orings for the throttle body gas lines, put my pullys back on the engine. Then fire that mother up!:chevy:

Pics tomarrow.(I left the camera at dads shop):devil:

Re: Tbi swap build thread
 

Lookin good! nice work!

Re: Tbi swap build thread
 

Thanks :).

Re: Tbi swap build thread
 

Any further updates on your conversion (all done I suppose) ???

//RF

Re: Tbi swap build thread
 

Not done yet I have run into a little problem with it. I have had it running and it ran great but for some reason It has stopped gitting fuel to the injectors and since I have went backed to work I have not had any time to get back and check anything. It has a brand new pump in the tank so I don't know why it has quit but I HOPE to get back to it Sat. If I can stop having to running calls long enuff. I am a hvac thec for a rather large contractor for this area and we have been swamped with calls since I got back:waah:. (Globlal Warming my A**:lol:.) This is the coldest it has been around here in at least five years.

Anyway I will have an update when I get time to work on it. Thanks for asking;). ,Jamie

Re: Tbi swap build thread
 

Jamie, I was wondering about your project as well. Keep us posted. I bet whatever is wrong turns out to be something simple.

You're right it is cold here! I am in Nashville this week and I was surprised how cold it is here. I didn’t know TN got this damn cold. Good business for a HVAC tech though!

Re: Tbi swap build thread
 

I will keep you guys posted I promise.;) Worked 13 &1/2 hours Friday, 9 on monday, 14 Tuesday, 9 Today. I didn't work this much last summer :lol:. It shoud slow down starting tomarow. It is going to be up in the high 50's.

I hope it is, I need a break. My hair is turning more gray by the hour at this rate :lol:.

Re: Tbi swap build thread
 

You can verify that FP is functioning couple of ways.

1) When you cycle ignition key from off to run ECM goes through a POST routine during which FP relay is energized for about 2-3 seconds (you shouls be able to hear it run) and subsequently turn off. If all other test check out SES goes from solid - blinks off and turns back on solid until engine starts (after cranking). During cranking FP should be energized.

It is rare, but 7747 ECM have been know to loose FP relay circuit driver transistor (2N2907 ) when FP relay is shorted to ground.

2)To verify if FP is functional you can force FP relay into a test operation via bypass, fuel system prime pig tail at the FP relay socket.

Re: Tbi swap build thread
 

Well the Fuel pump is running. I get gas up to the throtle body on the supply line but it just spits gas out the injector. I can pour gas in the tb and it will run untill it runs out of gas???:devil:

Re: Tbi swap build thread
 

Gas to TB is good. If injectors are not spraying during cranking there are couple of possible problems.

1) Disconnect both injectors from harness. Check the +B (red and green???) injector wire - it should be +12 when ignition key is on and during cranking.

2) If you have +12V on red wire reconnect injectors, get a +12 volt low current test light (or fast DVM). Probe both injector pins (red and green and red and blue - colors are typical, but maybe different) - red should be a steady +12, while the other side should pulse on-off-on during cranking. No pulse indicates that's ECM is not pulling line low. There are couple of possibilities.


//RF

Re: Tbi swap build thread
 

could also use some injector noid lights.

Re: Tbi swap build thread
 

Hi guys. Found this site after extensively searching the web on TBI swaps and it seems like a great source of info. I am in the process of converting a friends 59 Chevy Apache pickup from a straight 6 to 350 TBI out of an 88 Chevy 2wd pickup. We are using the donor rigs wiring harness. Anyway, I have the mounts fabbed and engine in and and getting close to trying to wire it up. We stripped the harness and all sensors from the donor but the part I am having trouble understanding is what exactly I need to power up for wires from the harness? I plan to add a 6 lug fuse block just for this purpose. I have some wiring diagrams that are helpful, but don't know what wires I NEED hooked to the fuse block, or elsewhere? We are using the 5 speed manual from donor as well and since we are using the stock wiring do I need to do anything to work the VSS? . For a gas tank we were thinking of an 88 Blazer which dimensionally looks doable, and takes the same pump/wiring etc..

Thanks for your time,
Chad

Re: Tbi swap build thread
 

Go back to the first page of this thread. It's not a diagram but a list of wire colors and what they do in the harness. If you use the stock harness you will have to strip all if the harness tape off and trace the wires down. It's not that hard. Good luck if you have any questions just ask.
Jamie

Re: Tbi swap build thread
 

Sorry for the dumb questions guys. I looked the thread over again start to finish and it covers most of all of it, great info! I have been reading about it so much my mind is numb. Anyway, I have a wiring schematic for a 90 that seems to be pretty accurate to our 88 that has helped. We stripped the harness down today and unloaded the known unnecessary wiring but....

Wires/connectors I am unsure of at the moment:

Two wire connector that dumped at the front of the engine by the temp sender. Pink/black (splices into A6 IIRC) and brown I believe. Was this for air pump or something? Doesn't appear to have been hooked up anytime recently. I don't think it's AC related, looks like a different connector.

Tan 18g wire that went into the cab at the bulkhead under the master cyl. Dumps near the dstrib. Don't think it was hooked on donor.

2nd purple single wire O2 sensor connector on pass side. Ditch or keep for future?

VSS wires coming from bulkhead to trans, purple and yellow I believe. Where do I hook these? I assume coming from near the fuse box at least one is powered? Not sure what I need to do being a 5 spd, and wires sound different than most I have read.

Neutral safety wires also go into bulkhead and not ecm. If I remember right the colors were blue, and green. I'm guessing one must have went to the clutch pedal somehow?

Lastly, there is a large red 12 or 10g wire that plugs in near the ECM under the dash. Goes to the gauges and power strip? needed?

So if I understand correctly all I need from the 3rd (white in my case) connector near the ECM is the diagnostic port wires, orange, white/black (data) black/white (ground) red fuel pump test wire, and brown/white SES wire (one side to a 12v light, other grounded) Am I on the right track?

We have the 747 ECM, 88 1500 truck harness, and 5 speed manual. I don't have the service manual yet (I know) but think we can get it going off what I have dug up.

Also curious if I should wire in a 3-wire o2 sensor while it's easy to do or should I even bother? Engine does have headers and I remember reading a TBI source that recommended upgrading sensors when using headers. I know single wire o2's are slow but if the 3 wire is a waste on the older FI system we'll leave it be.

Thanks in advance! Sorry for the laundry list of dumb questions.

Re: Tbi swap build thread
 

Wires/connectors I am unsure of at the moment:
Q1
Two wire connector that dumped at the front of the engine by the temp sender. Pink/black (splices into A6 IIRC) and brown I believe. Was this for air pump or something? Doesn't appear to have been hooked up anytime recently. I don't think it's AC related, looks like a different connector.
A1)==================================================================
If original harness was sourced from a 1227747 TBI truck then it is Air Diverter solenoid connector:
A6 + 12Vdc Pink-Black (Ignition hot)
C2 Air Diverter Brown
====================================================================
Q2
Tan 18AWG wire that went into the cab at the bulkhead under the master cyl. Dumps near the dstrib. Don't think it was hooked on donor.

A2)==================================================================
Hard to tell, if it has a white stripe it can be an EST!
===================================================================
Q3
2nd purple single wire O2 sensor connector on pass side. Ditch or keep for future?

A3)==================================================================
Pre 1992 trucks used single wire O2 - keep it as O2 used tan wire tied to D6 as O2 ground and
Purple D7 as O2 sensor input.
===================================================================
Q4
VSS wires coming from bulkhead to trans, purple and yellow I believe. Where do I hook these? I assume coming from near the fuse box at least one is powered? Not sure what I need to do being a 5 spd, and wires sound different than most I have read.

A4)==================================================================
The reason for different color wires that most applications used buffer DRAC module between VSS and ECM. However all this VSS nonsense is easy to get around. If you are using 7747 ECM you need two pulse (2000 pulses per mile) square wave VSS Part # 2PRS from JTR or equivalent. Connect purple wire to ECM VSS input A10 and the other wire to electric ground –A11. VSS is done. Internally ECM has 5.1k pull up resistor on line A10 which keeps VSS line high. As speedometer cable turns VSS sensor pulls this line down and ECM is able to detect these voltage transitions. It is important to have operable VSS – ECM uses this for a number control functions!
===================================================================
Q5
Neutral safety wires also go into bulkhead and not ECM. If I remember right the colors were blue, and green. I'm guessing one must have went to the clutch pedal somehow?
A5)==================================================================
That is not true - ECM pin B10 is P/N input. For automatics a simple circuit which uses relay, diode and wire can be easily configured. http://www.painlessperformance.com/M...nstruction.pdf
For a five speed leave ECM pin B10 open – do no connect to anything.
===================================================================
Q6
Lastly, there is a large red 12 or 10g wire that plugs in near the ECM under the dash. Goes to the gauges and power strip? needed?
A6)==================================================================
Hard to tell – post a picture of these wires
===================================================================

Q7
So if I understand correctly all I need from the 3rd (white in my case) connector near the ECM is the diagnostic port wires, orange, white/black (data) black/white (ground) red fuel pump test wire, and brown/white SES wire (one side to a 12v light, other grounded) Am I on the right track?

A7)==================================================================
For ALDL connector you’ll need the following wires:
Pin # | Color | Function
A | Blk-White | Ground
B | White | Diagnostic enable
C | Brown | Air Diverter
D | n/c
E | Orange | ALDL serial data
F | Tan | TCC – only for A/T

For SES Pin A5 Brown-white to one side of SES light and the other side to +12 V in run/start . Make sure that your SES light does not require too much current – 20 mA or less.
===================================================================


We have the 747 ECM, 88 1500 truck harness, and 5 speed manual. I don't have the service manual yet (I know) but think we can get it going off what I have dug up.

Q8
Also curious if I should wire in a 3-wire o2 sensor while it's easy to do or should I even bother? Engine does have headers and I remember reading a TBI source that recommended upgrading sensors when using headers. I know single wire o2's are slow but if the 3 wire is a waste on the older FI system we'll leave it be.

A8)==================================================================
I run four wire O2 sensor – ground return reference wire remove any possibility of a poor ground return path from O2 sensor readings, especially with long tube headers that may cool. O2 sensor must remain above 600F to provide correct voltage readings. The other two wires are used for heater coil. A simple relay tied to ignition on circuit turns on O2 heater. Use AC-Delco AFS-74 (25312179) for best results


//RF

Re: Tbi swap build thread
 

Hey the only dumb qeustion is one you do not ask;). I am sorry if I made it seem like you asked a dumb question.(That is not what I meant at all)
This is what I started this thread for was to try to answer questions about a TBI swap.

I am like rf if you can get a pic one of us might can figure out what the mystery red wire is.

This is the diagram I used.

Attachment 426243

If you have any other questions just ask :)

Re: Tbi swap build thread
 

Ok guys, did some more ciphering on the harness yesterday. I think I got most of it traced out. This is what my 3rd (white connector that leads to gauges and ALDL) near the ECM looks like, and how I interpret it.

A-A9 wht/blk=ALDL diag enable
B-A5 brwn/wht=SES light ground
C-empty
D-A7 tan/blk=TCC/shift indicator
E- To RH injector, red=12v keyed power?
F-A6 pnk/blk= 12v ign " "
G-empty
H- To air diverter connector, brown
J-C9 prpl/wht= crank input needed for anything?
K-B10 orng/blk=Park/neutral... this is empty on ours, had no wires coming out
L-RH o2 sensor, prpl. Not hooked up
M-A10=VSS, brown. Did this go to the buffer under the dash? I thought the other two controlled VSS?
N-Ground, blk/wht
P-Fuel pump relay, red/wht
R-A8=ALDL data

Also have a light blue/blk wire in the ALDL connector that I snipped out of the donor harness under the dash, couldn't see where that went. Guessing I can lose that.

And in this shot you can see the red mystery wire that comes in with the ECM connectors. One side goes to the power strip/block with a fuseable link.
http://i91.photobucket.com/albums/k3...e/pic12141.jpg

http://i91.photobucket.com/albums/k3...e/pic12138.jpg
Wires I have left on the bulkhead/fuse block side.
Blue-green NSS wires, or at least that's what I thought they were. Maybe they go to the gauges?
Purple/wht-yellow VSS wires, into cab through VSS buffer?
Tan, unknown. Looks like it was long enough to reach the fuel pump relay, or maybe IAC? Anyway I looked at all the sensors and I just don't see anything missing. Distrib has all of it's wires too.
Pink, coil hot, 12v start/run
Dk Green, temp sender goes to front of L cyl head, for factory gauge I presume? I was thinking of putting in an aftermarket gauge here.
Purple, starter engage wire 12v
Red, goes to power block. I was thinking of using this for 12v power to the ign key?

I ended up finding a service manual in my shop on the book shelf (d'oh) and it helped some, but I still didn't see anything useful for under the dash. Under the wiring for the air diverter it says "if equipped" does that mean I can ditch it? It wasn't hooked on our donor and the truck ran pretty good.I see those valves cost a few bucks.

Also, I don't recall any from of speedo cable provision on this trans, can I still use an aftermarket VSS converter?

Thanks for all the help, I know you guys must get sick of the same questions but I'm not very familiar with these trucks or systems, and wiring isn't my forte' either.

Sorry to hijack your post cj! How are you making out on yours?

Re: Tbi swap build thread
 

Cuda

I have to spend a bit time and draw a schematic based on your information - as starting point, subject to further revisions. Soooo, hang on tight - it is always fun to do a bit of reverse engineering to get things working! Meanwhile XYL wants to have quality time...

CU

//RF

Re: Tbi swap build thread
 

I am like rf I am going to have to look some stuff up to figure everything out on hte wires that you have pictured. This is what I do know by just looking at the wires.

On the wiers you have left Going from left to right.

BLU and the lt green go to the back-up liight switch on the bottom of the stearing collumn. I know this one.

The purple could be the wire that goes to the starter you can trace this back to the computer to see if it is. If it is it will go back to C-9 on your computer plugs.??

The dark green looks to me to be an ac wire they are dark green. ??

The heavy red looks like it should of gone to the starter. That would make sense if it was on the power block from the starter on the 88 truck. ??

The black wire looks like a ground wire for the aldl link or a ground peorid. ??

The tan could be the o2 sensor. Check D-6 on hte computer plug to see. ??

Pink wire looks like the coil wire . ??

Prpl and white This really looks like the crank signla wire to me. I would trace it back to see if it went to C-9 ??

The yellow wire looks to me to be the coolant temp sensor wire. I would trace it back to see if it went to C-10. ??

I hope this help ya.

I am going to get back on mine tomarow if I don't get called into work.

Good luck, Jamie

Re: Tbi swap build thread
 

This posting will deal with ECM side of wiring harness. A simple TBI wiring diagram can be found here:

http://i226.photobucket.com/albums/d...uckoverall.gif

Regarding 3rd connector - I have couple of questions - please see my list below:


3rd Connector ECM Wire Function
A A9 white/black ALDL diagnostics enable
B A5 brown/white SES light (pulled to ground by ECM)
C Empty
D A7 tan/black TCC/shift indicator (not used with std transmission)
E To RH injector, red=12v keyed power?
YES, connect to 15 Amp ECM Fuse #1 via separate relay – more on this later
F A6 pink/black 12v ECM Fuse #1 Hot in RUN/START
G Empty
H C2 Brown To air diverter valve connector.
You can ditch it if you are not using AIR pump.
J C9 Purple/white crank input needed for anything? YES
K B10 orange/black Park/neutral... this is empty on ours, had no wires coming out. OK
L ????? Purple RH o2 sensor, prpl. Not hooked up.
Does go down into engine bay? Can you find the other end?
M A10 Brown VSS, brown. Did this go to the buffer under the dash?
(Yes, it went to DRAC module) But now tie to one of the two wires that will connected to after market VCC module, the other to ground
N ????? black/white Ground
P red-white Fuel pump relay, red/wht
(Which terminal of Fuel pump relay???)
R A8 Orange ALDL data


Also have a light blue/blk wire in the ALDL connector that I snipped out of the donor harness under the dash, couldn't see where that went. Guessing I can lose that. (YES)
And in this shot you can see the red mystery wire that comes in with the ECM connectors. One side goes to the power strip/block with a fuseable link.
In GM wiring practice solid red indicates direct connection to battery (10-12 AWG), solid orange indicates fused battery line and pink with various color stripes indicates fused ignition line.


Since you are putting into older vehicle I would install an auxiliary relay panel (see Painless Part# 70107 Fuse Block / 7 Circuits kit http://www.painlessperformance.com/M...nstruction.pdf).
This panel would off load current that otherwise would have to travel through 50 year old ignition switch!

More to come... Just hang on tight.
//RF

Re: Tbi swap build thread
 

That is a great diagram RF. Thanks for the time.:chevy:

Re: Tbi swap build thread
 

My friend/owner of the truck came over today and we went through his factory wiring. I was thinking we will use a new ignition switch and distribute power through it. Nothing will actually be going through his wiring this way. We have it stripped down to just a few wires left on his that we figured we can power off the new, or even existing fuse box. The items left are...

Headlights
Turn signals/brakes etc
Cig lighter
Radio
Horn

That's about all there is to this thing. There are a grand total of 4 wires going to his fuse box now! Pretty simple.

I was thinking of using the red 10g hot in from the power strip for the BAT side a switch.
Purple 10g for to starter on START terminal of said switch
A jumper from that wire to fuse block, C9 prple/wht on the other side of that fuse.
New 10g wire from ACC or RUN terminal on ignition switch to power up new fuse block.
And then my wires needing 12v in RUN can be hooked to new fuse box.

Does this sound acceptable? Like I said, I am no wiring master.

I traced a few of the unknowns left today and found the green wire was temp sender on head (was hooked on old engine) went to the gauge cluster (that was what I was unsure of on that one)
Tan that goes to nowhere, also goes to gauges
All VSS wires go into cluster harness
Blue and light green wires from trans....blue to switched hot in fuse and green doubles around and heads back out to engine bay, no clue from there but guess it's too back-up lights as cj suggested?
Also forgot brown wire last night. Goes from alt to cluster for volt gauge I reckon?
And fuel pump harness has a pink wire from pump to the cluster that I initially thought was a hot but if power is Tan/white via orange, this must have been for the fuel gauge?
The rest I think are pretty much known.

Thanks a bunch guys. Can't wait to fire her up! Going to button it up and plumb some fuel soon just to see if it will ignite. After that it gets blown apart and goes out for paint. Here is the rig it's in.
http://i91.photobucket.com/albums/k3.../59apache5.jpg
http://i91.photobucket.com/albums/k3...e/pic12131.jpg
:chevy:

Re: Tbi swap build thread
 

Forgot to ask. I have to relocate the knock sensor for header clearance. Is the fuel pump provision acceptable even though it's not machined or open on this block? Don't see anywhere else it will fit.

Thanks!

Re: Tbi swap build thread
 

CUDA

I am still drawing few more diagrams based on your last response. I think that you are almost there. Nice truck!

/?RF

Re: Tbi swap build thread
 

A typical TBI system uses electrical fuel pump, which GM mounted in tank or alternatively, inline electrical fuel pump can be used instead. Typical system EFI system requires three fuel lines between tank and engine bay.
Supply line - 3/8" is used by Fuel Pump (FP) to supply fuel to TBI inlet. Please make sure that you have FP that can supply a minimum of 20 PSI. Do not go to crazy with fuel pressure as excess fuel will be bypassed and returned back to the gas tank via return line 5/16" or 3/8". Excessive fuel pump pressure tends to increase fuel temperature, which is not good - this will increase fuel vapor pressure. Third fuel line is connected to charcoal canister that connects to TBI (1/4") line.

Main DC power distribution.
http://i226.photobucket.com/albums/d...ng20090202.gif


//RF

Re: Tbi swap build thread
 

I am trying to follow what you are trying to do - it is very difficult without schematics or diagrams. Can you draw a diagram of what you are trying to do and post it. I know it is tough enough, but I am just trying to prevent shorts and burned wires and 'oh s*&*' moments!


You can relocate Knock Sensor (KS) to the other side, but it must be screwed into oil pan rail (water jacket drain plug) to be effective! KS is a calibrated microphone, tuned for a knock frequency found in a specific engine family.

//RF

Re: Tbi swap build thread
 

Here a good website source for TBI swaps: http://users.sfo.com/~eagle/howell.html

Re: Tbi swap build thread
 

Hey Guys, been working late and haven't had time to post anything. I wired it up as shown here, not sure if I forgot something but this should about cover it. Forgive the grade school artwork. All of the other ECM and sensor wires are untouched if not noted, everything is hooked up as it was other than the o2 sensor, plan to wire a 3 or 4 wire but probably not until after we fire it (will use the 1 wire temporarily)

The truck has an electric speedo and no VSS buffer that I can find and I traced the wiring under the donor dash to the cluster. We are trying to make the 88 speedo work in the 59 so that would help put that fire out. Will I need to do anything with the VSS wires to get it to run? We hope to test fire it soon. I ran new plug wires last night and buttoned up the under dash wiring. Just need to move the knock sensor and slide the donor tank under temporarily and plumb it up and she should be about ready. I can't move the KS to the other side because the headers are block huggers and dump right into the center on both sides. I might see if I can mod the KS wire/connector to clear the header as it isn't hitting by much.

If something looks off I'm all ears.

Thanks again,
Chad

Re: Tbi swap build thread
 

1) ECM B1 & C16 to battery - must be always hot (see chart and diagram).
2) You do not need VSS to get the engine fired, but you'll need it once you get it into driving condition.
3) Many other circuits must be wired-up before you can really drive it.... (Brake, turn, back up, etc)

//RF

Re: Tbi swap build thread
 

Depending on which 88 (NBS = pickup) you got it from the trans may supply pulses to the ECM which then filters it to run the speedo. The other version (OBS = burb/blazer) uses cable drive speedo with a VSS output box hung on it. Either way you need the appropriate input. Old style uses 4000 pulse per mile and the new one uses like a 132,000 signal divided and dropped down for various systems. There were a couple years of crossovers where Burbs has cable drive trans rather than electronic outputs. Need to make sure your trans/dash/ecm all play together.

Re: Tbi swap build thread
 

HVAC guy here too. We do strictly residential heating/cooling... no refrigeration :metal: Actually just started out in the trade 3 months ago. Like it lots so far and the pay is good.

Re: Tbi swap build thread
 

Good to see anouther hvac guy on here. I bet it is cold in CT. We are going to start doing spring start ups next month here in TN. it's 65 here today.:metal: