Project Underfunded / next phase - LSx carb'd to LSx efi
 

Well its time for the next phase on my project. I had a guy interested in a domain I had and we could never come together on a price. Finally discussed trades...next thing I know my truck is changing from carb to efi! :lol:

Just as well....the wife wouldn't ride with me with the Holley keeping the exhaust rich. Says she smells like shes been riding a motorcycle when we get out of it. So...here we go! :lol:

The plan? Remove all the carb related gear....carb and intake, MSD box and harness, the low pressure fuel system, etc. and then install new fuel system, efi intake and related components, efi harness, sensors, etc. then the plan is to find a 4L80-e to upgrade to. So here we go with a bunch of parts again. :lol:

how it sat:
http://www.lsxtrucks.com/images/albu...l_IMG_2155.jpg

http://www.lsxtrucks.com/gallery/alb...l_IMG_2156.jpg

once cleaned up (and pained maybe) this is replacing the carb intake:
http://www.lsxtrucks.com/gallery/alb...l_IMG_2683.JPG

and the harness I got (with a pre-tuned e38 ecm and a tcm)....is AWESOME!
http://www.lsxtrucks.com/gallery/alb...l_IMG_2675.JPG

http://www.lsxtrucks.com/gallery/alb...l_IMG_2677.JPG

http://www.lsxtrucks.com/gallery/alb...l_IMG_2676.JPG

http://www.lsxtrucks.com/gallery/alb...l_IMG_2678.JPG

if you're wondering its a custom Nelson Performance stand alone harness...not a cut up OEM harness. This thing is sweet! Labeled up, shrink wrapped, new relays and fuse panel, and even has that fiber weave covering that looks sort of like s.s. flex hose but black. I saw the custom pegged up super long table they're made on so I'm guessing its going to fit great. I have a walbro 255, GM filter/reg, and lots of new AN fittings and s.s. hose being delivered tomorrow.

Re: Project Underfunded / next phase - LSx carb'd to LSx efi
 

Sweet! TBSS intake? You'll never go back...
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Re: Project Underfunded / next phase - LSx carb'd to LSx efi
 

A moment of silence please........... Ok were done. Cant wait to see if it runs any different. Would be perfict time for a electronic trans....

Re: Project Underfunded / next phase - LSx carb'd to LSx efi
 

this is gonna be sweet!...

Re: Project Underfunded / next phase - LSx carb'd to LSx efi
 

thanks guys
not a TBSS as thats for catheral port heads. This is a LY6 which is like an iron 6.0L L92 ...instead of aluminum 6.2L.

Re: Project Underfunded / next phase - LSx carb'd to LSx efi
 

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Re: Project Underfunded / next phase - LSx carb'd to LSx efi
 

Kurt,
Did you get the harness direct from Nelson Performance? If so, how much?

Also, what does it need for a accelerator? I have an LQ9 from a 2005 Denali and trying to find a nice harness at a reasonable price.... and I read the e38 ecm doesn't use a separate module to control the accelerator pedal…

Re: Project Underfunded / next phase - LSx carb'd to LSx efi
 

mcm...Yes the harness came direct from Nelson Performance. It uses a late model accelerator pedal assembly that just plugs into the harness. Not sure where or what it came from as Nelson Performance provided it. I'm wondering if they have to be removed from a combo pedal assembly? Pic below

As far as the harness price (or the pedal, etc) I can't say as this was all part of a trade we made.

http://www.lsxtrucks.com/gallery/alb...l_IMG_2684.JPG

Re: Project Underfunded / next phase - LSx carb'd to LSx efi
 

Well I guess I'm overdue for an update. Got quite a bit done but didn't have the pics uploaded yet....so I wasn't going to post until I did. :lol:!

So...here's carb related gear tear down. Followed by fuel system removal, clean up, intake/tb installation, and getting wiring harness laid in.

pulling it apart. MSD gone, regulator and -8 AN fuel line gone, etc.
http://www.lsxtrucks.com/gallery/alb...l_IMG_2680.JPG

intake pulled and things wiped down.
http://www.lsxtrucks.com/gallery/alb...l_IMG_2689.JPG


cleaned up, painted and installed efi truck intake and TB.
http://www.lsxtrucks.com/gallery/alb...l_IMG_2697.JPG

http://www.lsxtrucks.com/gallery/alb...l_IMG_2698.JPG


drained and dropped the tank and installed fitting for fuel return line
http://www.lsxtrucks.com/gallery/alb...l_IMG_2711.JPG

http://www.lsxtrucks.com/gallery/alb...l_IMG_2712.JPG

walbro 255 pump and GF-822 GM filter/regulator and -6AN s.s. hose/fittings prepped for install with 3/8 NPT to original "primary" fuel filter. I'm keeping the -8AN from the tank to the Trick Flow canister filter. Almost wanted to just connect them with a double female getting rid of the hose...but figured weight/vibration/time would cause an issue... and with a little hose in between things are isolated.
http://www.lsxtrucks.com/gallery/alb...l_IMG_2713.JPG


harness layout/install to follow...

Re: Project Underfunded / next phase - LSx carb'd to LSx efi
 

the "stand alone" custom Harness has all the wire protected with either shrink wrap or that nylon braided wire tubing stuff in various sizes. All the connectors seem to be quality connectors. New 4 circuit fuse panel and multiple relays. 1st class all the way.

He left the end unterminated for the accelerator pedal...so it would be easier to pull the the firewall and I terminate it later. He also provided the pin out of course. Other wires are for DIC/OBD interface.

http://www.lsxtrucks.com/gallery/alb...l_IMG_2710.JPG

Drivers side harness all but disappears. Still need to install coolant sender and connect, plus air intake with MAF and connect.
http://www.lsxtrucks.com/gallery/alb...l_IMG_2715.JPG

Passenger side laid in great and everything fits great but the MAP sensor. Allen is going to check with Jon (one of his employees and the harnesses daddy :lol:) to determine the best route to correct.
http://www.lsxtrucks.com/gallery/alb...l_IMG_2716.JPG

Still have to decide how I'm running pcv/breather hoses...then will likely upgrade them.

Rest of harness is laid down the drivers side fender. I'll mount the ecm and tcm to the inner fender (may build a small box for them) and the relays to the fender. If I decided to go the other direction with it I'd need to run it inside the cab...not something it needs or I wanted to do...so drivers side it will be. I need to rewire a bunch of stuff that's still there... plus finalize the harness install. Should look real nice when complete.

http://www.lsxtrucks.com/gallery/alb...l_IMG_2714.JPG


Still looking for a 4L80e/85e to replace the 200-4r. I'm getting quite a stack of parts now... between the 1st build from a '68 body and a '72 chassis and drivetrain, then the 383 upgrade, the carb'd LSx build, and now the carb'd/efi swap. Here's just a few pieces of it..... :lol:

http://www.lsxtrucks.com/gallery/alb...l_IMG_2691.JPG

http://www.lsxtrucks.com/gallery/alb...l_IMG_2681.JPG

http://www.lsxtrucks.com/gallery/alb...l_IMG_2694.JPG

still need to install the new fuel system and fuel/return lines. O2 sensors the air intake MAF on the way and to be installed. Also picked up a TB seal and new injector o-ring pack just in case...

I think everything is lining up to start it for the 1st time on "efi" this weekend! Just need to find a brand new 4L85e for like a grand and everything would be great! :lol:

Re: Project Underfunded / next phase - LSx carb'd to LSx efi
 

You do amazing work my friend. Looks great. Cant wait to here the differance between carb and factory efi.:metal:

Re: Project Underfunded / next phase - LSx carb'd to LSx efi
 

Thanks.....and me too!

Re: Project Underfunded / next phase - LSx carb'd to LSx efi
 

I have had crazy dreams with set of twins in it......Turbos not what everyone else was thinking.....Wife actually caught me looking at factory efi setups. My poor fast efi cant do boost...sad day.

Re: Project Underfunded / next phase - LSx carb'd to LSx efi
 

Looking real nice.
What kind of paint did you use on the intake?
I want to paint mine and think yours looks real slick.
Kim

Re: Project Underfunded / next phase - LSx carb'd to LSx efi
 

Looks good Kurt. I'm working in Mckinney now, maybe I can stop by one of these days and take a look at it in person. Last time I was there, the whole truck was disassembled.

Bobby

Re: Project Underfunded / next phase - LSx carb'd to LSx efi
 

Thanks Kim. Its just some left over Rustoleum High Performance wheel paint in their "Steel" color which is a silver with some sparkles in it like a metallic. Then I hit it with some Valspar gloss clear enamel to protect it.

Yes it was Bobby! Its been put together...and pulled apart again! :lol:
At least this time its just some changes and not a complete redo. Still haven't gotten to paint and body yet. Yeah...just let me know when you want to swing by...as you know I'm always here! :lol:

Re: Project Underfunded / next phase - LSx carb'd to LSx efi
 

Lol man if you keep making changes in the setup at this rate you'll be able to "speed" tear down a motor faster than any of us.

Re: Project Underfunded / next phase - LSx carb'd to LSx efi
 

LMAO! Well......I'm think I'm trying to make up for years of suppressed hot rodding. You know...wanting to try out everything! :lol:

My truck does have a long story regarding all that its been thru since I got it! Well...this changed was unplanned. I'd be keeping it carb'd if this "trade" offer hadn't come up. I thought I was gonna get in cheap...then I bought sensors, hose, fittings, and more and its adding up quick!

That pile of new and barely used parts (along with a Holley Street HP 750, 2 sets of LSx p-rods, set of stock LY6 valve springs, OEM cam and more in my cabinets) is beginning to looks like a pile of money... to buy the new 4L85e I want....:banghead:


.........and I said I'd never pay for forum use anymore. The top of my User CP page has I can here it calling my name and saying "clicky-clicky" :lol:

Re: Project Underfunded / next phase - LSx carb'd to LSx efi
 

Exactly what I just did. This forum and eBay are funding my swap :chevy:
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Re: Project Underfunded / next phase - LSx carb'd to LSx efi
 

Lots of progress. Fuel system is done...but I need to secure a few things a little better. I spent extra coin and time trying to incorporate some of the 1/2" fuel hard lines and -8 AN s.s. hoses. After getting it all done with various adapters, and finding 3 leaks (at low pressure)... I decided to pull it all, and run a new -6 AN s.s. flex hose to replace it. :lol:
Harness got rearranged. I decided to run all the fuses, relays, ecm/tcm to the passenger fender. Have all sensors hooked up except O2 and MAF...should complete that tomorrow.
Bought an inexpensive (well, compared to the others) cold air intake kit for the '99-'07 trucks, plus a 22* 4" tube and extra coupler to work up something to fit... now I'm running that to the drivers side! :lol:

Got some rewiring to do, a couple of terminations.....then I can't think of one good reason not to hit the key! Since I have a GoPro now...I suppose I'll set it up to record the event. I'm actually kind of anxious to hear it now...vs w/carb and MSD timing it. get rid of or exaggerate the lope?

I know...............pics. :lol:

Re: Project Underfunded / next phase - LSx carb'd to LSx efi
 

I would be interested to see the cold air intake. I will need something for mine. I was thinking a 90* silicone elbow and some 4" (exhaust) pipe to one corner or the other.

Re: Project Underfunded / next phase - LSx carb'd to LSx efi
 

Exaggerate! :metal:
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Re: Project Underfunded / next phase - LSx carb'd to LSx efi
 

.....where are the pics man?

Re: Project Underfunded / next phase - LSx carb'd to LSx efi
 

Very nice work on the EFI install Kurt. You always do first rate work on your truck. I like the intake painted too. You'll be back on the road in no time. Good luck finding that tranny.

Re: Project Underfunded / next phase - LSx carb'd to LSx efi
 

:wop:

Re: Project Underfunded / next phase - LSx carb'd to LSx efi
 

I can't wait to see your cold air intake.
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Re: Project Underfunded / next phase - LSx carb'd to LSx efi
 

OK....sorry for the delay guys. Had to leave the computer for a few days to get something done!

lets see Saturday...I got the -6 AN s.s. hose installed for a return line, got the fuel pump mounted, and the Corvette filter/regulator in with Russell efi adapters and -6 AN fittings - 3/8" s.s.hose...then reinstalled tank.

http://www.lsxtrucks.com/gallery/alb...l_IMG_2723.JPG

http://www.lsxtrucks.com/gallery/alb...l_IMG_2732.JPG

http://www.lsxtrucks.com/gallery/alb...l_IMG_2734.JPG

I bought lots of fittings and adapters to change my 1/2" hose and -8AN fittings to 3/8" -6AN...had leaks all over so I pulled it all out
http://www.lsxtrucks.com/gallery/alb...l_IMG_2728.JPG

built a new 3/8" s.s. hose w/-6AN ends to replace it all.
http://www.lsxtrucks.com/gallery/alb...l_IMG_2729.JPG

new fuel pump power lead being run also:
http://www.lsxtrucks.com/gallery/alb...l_IMG_2747.JPG

http://www.lsxtrucks.com/gallery/alb...l_IMG_2748.JPG

which takes it all the way to the -6AN to 3/8" Russell efi adapter and the fuel rail.
http://www.lsxtrucks.com/gallery/alb...l_IMG_2750.JPG


then it was back to the harness. I started laying everything out on the drivers side, and run the intake to the passengers side like its designed (and checking things with the extra pieces I bought)...
http://www.lsxtrucks.com/gallery/alb...l_IMG_2714.JPG

http://www.lsxtrucks.com/gallery/alb...l_IMG_2724.JPG




but....wait...there were wires to pull out of my wiring 1st....the 2 UEGO's, the MSD, electric fuel pressure, etc.
http://www.lsxtrucks.com/gallery/alb...l_IMG_2767.JPG

and with a little work I think I can make my CAI setup run to the drivers side...
http://www.lsxtrucks.com/gallery/alb...l_IMG_2754.JPG

which would put the harness end/power/ecm etc. running to the passengers....and decided I would put it on the passenger side on a shelf (need to build) on the fender. As soon as the budget allows a Vintage Air purchase...the ecm and tcm will be mounted on the firewall.
http://www.lsxtrucks.com/gallery/alb...l_IMG_2766.JPG



then they started predicting bad weather thru the weekend that could include hail. That was enough to motivate me to put the truck on wheel dollies and push it to the side (it sat in the middle of the garage and sideways) so I could bring the SS in. That put the rest of the work on hold until Sunday.
http://www.lsxtrucks.com/gallery/alb...l_IMG_2769.JPG

Re: Project Underfunded / next phase - LSx carb'd to LSx efi
 

Into the next day...with pulling the a/f gauges, the MSD box, etc....of course there was wiring changes on the inside.
http://www.lsxtrucks.com/gallery/alb...l_IMG_2768.JPG

in mocking up I checked clearance...and its either just barely touching the hood...or not.
http://www.lsxtrucks.com/gallery/alb...l_IMG_2758.JPG

so...I reworked the original wiring on the drivers side (which is going to be placed behind the fender), moved the Painless Circuit Boss toward the front, and grouped in an new wires...which came out cleaner then it was before. :lol:
http://www.lsxtrucks.com/gallery/alb...l_IMG_2774.JPG

then I mounted the new relays and fuse panel on the passenger side, and bolted the ecm/tcm together thru one bolt in the inner fender to hold them for now...until I get a shelf built that will hold them until the truck gets a/c and I flush the firewall
http://www.lsxtrucks.com/gallery/alb...l_IMG_2779.JPG
http://www.lsxtrucks.com/gallery/alb...l_IMG_2778.JPG

that left reworking the CAI...its not all locked down yet....still adjusting.
http://www.lsxtrucks.com/gallery/alb...l_IMG_2772.JPG

http://www.lsxtrucks.com/gallery/alb...l_IMG_2771.JPG

http://www.lsxtrucks.com/gallery/alb...l_IMG_2770.JPG

http://www.lsxtrucks.com/gallery/alb...l_IMG_2773.JPG

http://www.lsxtrucks.com/gallery/alb...l_IMG_2775.JPG


and with everything in under the truck and under the hood installed, hooked up, plumbed, etc.....it was time to push the pedal harness thru the firewall and push the pins into the connector, and connect the foot pedal. After that....its key on! I will need to get another pedal tho...or make a big base for this one so for now the pedal assembly is just laying in place.

So I'm looking at the schematic and pushing the pins into the connector when I get to the last pin.......and its bent! As I tried to bend it back...it just snapped in the middle. AAAAAAaaaaaaaaahhhhhhhssssshhhhhhhhhhhh!!!!!! :banghead:

so.....I pushed it back over to the side and wait for parts. :lol:
http://www.lsxtrucks.com/gallery/alb...l_IMG_2783.JPG

Re: Project Underfunded / next phase - LSx carb'd to LSx efi
 

Isn't that the same pin as the computer connectors? If it is, PM me your addy I'll mail you a couple.

Re: Project Underfunded / next phase - LSx carb'd to LSx efi
 

I used the same Russell Quick Disconnect Fuel Fittings for my fuel rail when I installed the fuel lines in my 5.3 swap. Shortly afterwards, I started my PU and the preasure line came off when the pump preasured up. The plastic retainer clip stayed on the fuel rail and the fitting came off spraying fuel all over my engine. Luckily, my engine was cold. If this had happened while I was driving, it could have caught fire. At first I thought the fitting just wasn't seated correctly and re-installed it. It re-installed fine and re-seated correctly and did not come back off since I added a zip-tie to ensure it didn't come off. I was going to just replace the preasure fitting with a new one and when I checked the LS1 website, I came across a post listing this same problem. It appears this is becoming a common occurance with mostly the preasure side Russell quick Disconnect fitting.

I found out that Russell has a new style fitting that has a screw on c-clip retainer and will not come off. The fitting part numbers are 644120 (Summit #RUS644120) for the 3/8 preasure side and 644110 (Summit #RUS644110) for the 5/16 return line.

I called Summit and at that time, they did not have the part numbers in their system. They called Edelbrock and got the part numbers and I ordered both fittings and have replaced the ones I originally installed.

You may want to consider replacing the fuel rail preasure fittings with the newer style to prevent this from happening. Here is a photo of the new fitting.

Re: Project Underfunded / next phase - LSx carb'd to LSx efi
 

That looks like a very clean install so far. I like the intake a lot.

Re: Project Underfunded / next phase - LSx carb'd to LSx efi
 

Thank you for the offer....but Allen is already sending me some today.

Wow.....you mean the AN/efi fittings I just put in....those fittings, are garbage? That's about the way my purchasing usually goes...wrong part, better solution available, price reduced after my purchase............ now I'll add crappy part that needs upgrading to the list. :lol:


Thanks 'burb!

Re: Project Underfunded / next phase - LSx carb'd to LSx efi
 

I had my fuel rail modified to just have -6 screw on connections.

Re: Project Underfunded / next phase - LSx carb'd to LSx efi
 

that makes it easy!

Re: Project Underfunded / next phase - LSx carb'd to LSx efi
 

Yes Kurt it did, but I had to send it off to be modified. After I thought, heck I could have done that! but oh well.

Re: Project Underfunded / next phase - LSx carb'd to LSx efi
 

I'm not to good with a MIG......much less a TIG. :lol:

Re: Project Underfunded / next phase - LSx carb'd to LSx efi
 

Nice work on this conversion Kurt. You have knocked it out fast like you have a deadline brother:)

Re: Project Underfunded / next phase - LSx carb'd to LSx efi
 

The new fittings are basically the same price as the old ones, they need to just remove the old ones and sell the new ones. I took my old ones off and threw them in the trash. As I stated earlier, my truck would have gone up in flames if that had happened while going down the road with a hot engine. I put a post on after that happened about the fittings but I don't think anyone paid any attention to it because I still see people posting photos with the old fittings on their builds. Your build looks awesome. Keep up the good work. I drive mine everyday and love it. (Over 11,000 miles now and no problems so far).

Re: Project Underfunded / next phase - LSx carb'd to LSx efi
 

Thanks Mike!

awhite...maybe when someone gets hurt (or worse) sues Russell....maybe they'll take those old fittings off the market.

Trying to build mine so that I can go beat on it at the track and still trust it to get me home...plus the occasional cruise.


AND BTW...........if anyone is interested in any of the LSx related components that I removed (GMPP dual plane L92/LS3 intake, MSD 6012, 2 different Holley carbs, Holley reg. 2 fuel pumps (1 NIB), 1/2" -8 AN stuff, etc. ....they're for sale. May throw in more left over from the build. I'll be posting a thread with pics and prices. Have to pay for the 4L85e somehow! :lol:

Re: Project Underfunded / next phase - LSx carb'd to LSx efi
 

Ok guys...need some help!

Hoping I can find out something from the knowledge pool!

I have an '09 LY6 that I'm converting back to efi from it being carb'd for the last year. I have a custom built "stand alone" harness with ecm and tcm setup for a 4L80e. There is a 200-4r in place right now so the harness ends for the ISS, VSS, and 4L80e and not connected to anything tho the harness is connected to the tcm.

I have a wiring problem I think.......just not sure. I can apply power to my Walbro external fuel pump and it run all day and build 56psi at the fuel rail. Connect it to the harness and power up the harness....and the fuel pump cuts out within 2-3 seconds. I guess I should clarify...the fuel pumps relay kicks out...the primary relay for the whole system is still active...so its somehow tied to the pumps relay. The vehicle will not start...but a little starter fluid in the throttle body and it will try to fire up and run. I've drained off the fuel in the line so that tho old fuel isn't filling the fuel rails.

Oh.....and the harness builder and tuner are not the issue and not open for discussion. Maybe at a later date once the problem is found and resolved so that everything is working as it should. I don't want this to turn into a bashing thread!

I have swapped the relays and the fuel pump relay still cuts out. So....have I got a wiring issue that needs the harness removed and sent to the builder? Or is it possible that I have an ecm problem? How do I verify the injectors are firing?

Thanks in advance!