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#26 |
Registered User
Join Date: Apr 2008
Location: Converse, TX
Posts: 49
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Re: 5.3 SWAP Wiring Problem
Yes they are both connected, I have been Coresponding with Jesse at W4M, he said to check the harness, make sure all the pink wires have 12Vdc, funny... I sent it to them to get it fixed in the first place, didn't think I would have to double check there work! If that was the case I would have done it myself.
I found Three grounds, the two in the back pf the engine, that you pointed out, and one on the front, behind the Power Steering pump. Then My Chasis, Engine, Body and Battery Ground straps. |
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#27 |
Truck and auto performance nut
Join Date: Feb 2007
Location: McKinney,Texas
Posts: 3,848
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Re: 5.3 SWAP Wiring Problem
Would it possibly need a crank relearn procedure done for some reason?
__________________
Kurt - '68 GMC short step - NIB '09 LY6 6.0L crate motor w/mods, NIB '12 crate 4L85e w/billet 3k stall Circle D, 3.73 posi 12 bolt, DynaTech f-swap headers, 3/4 drop, handling mods, etc. - my toy '72 Chevy LWB C-10 Highlander - 350/350 ps/pb/tilt/ac - not original but close '06 Chevy TrailBlazerSS - LS2/4L70e - little black hot rod SUV - my DD '18 Kia Sorento - wife's econo-driver '95 Chevy S10 - reg cab shortbed, LS, 4.3, auto... my '68's powertrain and chassis build -links broken A surprise phase - carb to efi -links broken |
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#28 |
Registered User
Join Date: Apr 2008
Location: Converse, TX
Posts: 49
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Re: 5.3 SWAP Wiring Problem
It might, How do you do that? I don't have a check engine light to view any codes. Any idea's how to rig one up?
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#29 |
Registered User
Join Date: Jul 2009
Location: Russellville, Arkansas
Posts: 1,699
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Re: 5.3 SWAP Wiring Problem
What fuse box are you using for your harness. Verify the fuse is good/ there. Verify connectors at the fuel rail are connected good. This is the connector on each side of engine that connects coil harnesses to engine harness.
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#30 |
Registered User
Join Date: Apr 2008
Location: Converse, TX
Posts: 49
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Re: 5.3 SWAP Wiring Problem
I'm using the original 72 fuse block with an inline 15 amp fuse to the harness then a 10 amp fuse to the ECM/PCM.
Last edited by sick454; 08-22-2010 at 11:50 PM. |
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#31 |
Truck and auto performance nut
Join Date: Feb 2007
Location: McKinney,Texas
Posts: 3,848
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Re: 5.3 SWAP Wiring Problem
__________________
Kurt - '68 GMC short step - NIB '09 LY6 6.0L crate motor w/mods, NIB '12 crate 4L85e w/billet 3k stall Circle D, 3.73 posi 12 bolt, DynaTech f-swap headers, 3/4 drop, handling mods, etc. - my toy '72 Chevy LWB C-10 Highlander - 350/350 ps/pb/tilt/ac - not original but close '06 Chevy TrailBlazerSS - LS2/4L70e - little black hot rod SUV - my DD '18 Kia Sorento - wife's econo-driver '95 Chevy S10 - reg cab shortbed, LS, 4.3, auto... my '68's powertrain and chassis build -links broken A surprise phase - carb to efi -links broken |
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#32 | |
Registered User
Join Date: Apr 2008
Location: Converse, TX
Posts: 49
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Re: 5.3 SWAP Wiring Problem
Quote:
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#33 |
1965 Chevy C10, 2005 4.8L/4l60
![]() Join Date: Aug 2004
Location: DFW Texas
Posts: 8,543
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Re: 5.3 SWAP Wiring Problem
I dont know if this will help you but my swap had the same issue, however when I found one of the W4Me supplied harness power needs was a constant 12v through the key on and start process was lacking, I put one from the fuse box and it started and ran. I used the W4Me harness and sort of stock truck harness along with the fuel pump and fan relays. Hope it helps.
__________________
Clyde65 Rebuild of Clyde http://67-72chevytrucks.com/vboard/s...84#post8338184 69 Aristocrat Lo Liner build http://67-72chevytrucks.com/vboard/s...84#post7561684 ![]() ![]() ![]() support our troops! |
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#34 |
Registered User
Join Date: Jul 2009
Location: Russellville, Arkansas
Posts: 1,699
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Re: 5.3 SWAP Wiring Problem
What fuse box are you using in the engine harness. Theres fuses for the injectors and coils and other various systems in the engine harness. It requires some kind of fuse box such as the under hood fuse box from the donor vehicle or an after market one from Current performance. Check the fuses in this fuse box to verify good, or there/installed.
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#35 |
Truck and auto performance nut
Join Date: Feb 2007
Location: McKinney,Texas
Posts: 3,848
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Re: 5.3 SWAP Wiring Problem
you can send your PCM and VIN to a good tuner...and they will put the factory loads for your VIN into the PCM...once thats done, they tune it for your individual needs (fuel octane, elevation, reduction of torque management, etc.) before returning it to you. With this done a crank relearn shouldn't be necessary.
ALL of this is one of the reasons I am putting a carb on my LSx. ![]()
__________________
Kurt - '68 GMC short step - NIB '09 LY6 6.0L crate motor w/mods, NIB '12 crate 4L85e w/billet 3k stall Circle D, 3.73 posi 12 bolt, DynaTech f-swap headers, 3/4 drop, handling mods, etc. - my toy '72 Chevy LWB C-10 Highlander - 350/350 ps/pb/tilt/ac - not original but close '06 Chevy TrailBlazerSS - LS2/4L70e - little black hot rod SUV - my DD '18 Kia Sorento - wife's econo-driver '95 Chevy S10 - reg cab shortbed, LS, 4.3, auto... my '68's powertrain and chassis build -links broken A surprise phase - carb to efi -links broken |
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#36 |
Registered User
Join Date: Apr 2008
Location: Converse, TX
Posts: 49
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Re: 5.3 SWAP Wiring Problem
OK here is what happened, Went and got a Scanner and the only codes it's giving me are the HO2S Heater codes. And that should not keep it from running. (P0030, P0036, P0050, P0056) I asked WFM to remove the two they recommended to remove (the back, I think), and still nothing. Jesse swears there is nothing wrong with it. I am severly frustrated! Then he wants me to go buy 4 O2 sensors and leave them hanging to see if it will start then??? They are a little expensive for me to just experiment with them.
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#37 |
Registered User
Join Date: Apr 2008
Location: Converse, TX
Posts: 49
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Re: 5.3 SWAP Wiring Problem
Alright, I went out to double check, I only have two O/2 sensor plugs (W4M remove the two rear ones) but the Scanner is giving me four 0/2 codes. unplugged the MAF sensor and still nothing. Anyone with ideas? Thay haven't been discussed thus far?
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#38 | |
Registered User
Join Date: Apr 2008
Location: Converse, TX
Posts: 49
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Re: 5.3 SWAP Wiring Problem
Quote:
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#39 |
Registered User
Join Date: Jul 2009
Location: Russellville, Arkansas
Posts: 1,699
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Re: 5.3 SWAP Wiring Problem
OK, he's got inline fuses installed. No bulky fusebox to look at then. Check to verify theres actually a fuse installed in the holder, and that it still is good. Have you checked to verify you have power on the circuits that energize when the ignition key is on and also in the crank positon. It will go through a relay to energize these circuits. With an aftermarket harness I don't know where'd he'd put this relay, but verify it's working. It sounds like it is if the injectors are cycling, but he may have them on seperate relays.
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#40 |
Registered User
Join Date: Jul 2009
Location: Russellville, Arkansas
Posts: 1,699
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Re: 5.3 SWAP Wiring Problem
If you can get some noid lights from somebody, you can check to make sure the injectors are all cycling.
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#41 |
1965 Chevy C10, 2005 4.8L/4l60
![]() Join Date: Aug 2004
Location: DFW Texas
Posts: 8,543
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Re: 5.3 SWAP Wiring Problem
Like I said and Eagle said, one of those wires that W4Me supplied needs key on 12v even when cranking so it will run, I will need to look when I get home to see which wire it was on mine. I would call W4Me and ask which one needs that kind of power to it.
__________________
Clyde65 Rebuild of Clyde http://67-72chevytrucks.com/vboard/s...84#post8338184 69 Aristocrat Lo Liner build http://67-72chevytrucks.com/vboard/s...84#post7561684 ![]() ![]() ![]() support our troops! |
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#42 |
Registered User
Join Date: Apr 2008
Location: Converse, TX
Posts: 49
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OK, First, I WAS WRONG.
![]() ![]() Now to hook up oil pressure and water temp gauges and then a trip to the muffler shop! IT's LOUD!!! Oh and yes it was labeled which was positive and negative, however at 10 pm on a saturday night, under a truck, in the dark, it's hard to remember to look and verify it. I wanted to Thank everyone who chimed in and offered help. they were all great idea's. Now on to the next step! |
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#43 |
1965 Chevy C10, 2005 4.8L/4l60
![]() Join Date: Aug 2004
Location: DFW Texas
Posts: 8,543
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Re: 5.3 SWAP Wiring Problem
I did the same thing......I completely understand how that could be missed.
__________________
Clyde65 Rebuild of Clyde http://67-72chevytrucks.com/vboard/s...84#post8338184 69 Aristocrat Lo Liner build http://67-72chevytrucks.com/vboard/s...84#post7561684 ![]() ![]() ![]() support our troops! |
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#44 |
Next project: 1970 K10
Join Date: Feb 2004
Location: Fort Collins, Colo 80524
Posts: 6,685
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Re: 5.3 SWAP Wiring Problem
I'll have this moved this to the LS swap area for future reference.
BTW, when I tried to start mine for the time, I also had fuel but no spark. Turns out the "key on" wire I had chosen to trigger my ignition coil relay had 12v when the key was in the "run" position, but lost power when in the "start" position. Changed the trigger wire to one that had power in both "run" and "start" and it fired right up. Glad it finally started for ya!
__________________
Bob 1970 Chevy K10 LWB "Goldie" 350/TH350 next project!! 1981 Chevy C10 LWB 355/TH350 - My son's truck LS SWAP FORUM! Tons of LS swap info here! PLEASE CLICK HERE TO SUPPORT THE GREATEST BOARD ON THE NET! CLICK HERE FOR THE FAQ INDEX by KRUE Last edited by glock35ipsc; 08-24-2010 at 10:04 AM. |
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#45 |
Registered User
Join Date: Jul 2009
Location: Russellville, Arkansas
Posts: 1,699
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Re: 5.3 SWAP Wiring Problem
Awesome, glad you got it figured out and was something so simple and cheap to fix. How bout some pictures now.
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#46 |
Registered User
Join Date: Jul 2005
Location: AL
Posts: 1,828
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Re: 5.3 SWAP Wiring Problem
its good that you guys share this kinda info.... will be helpful to others down the road...
this makes the challenges more fun.
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#47 | |
Senior Member
Join Date: Aug 2002
Location: Valley Center KS
Posts: 3,525
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Re: 5.3 SWAP Wiring Problem
Quote:
Glad you got it fired up |
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#48 |
Registered User
Join Date: Jan 2008
Location: Lacombe, Alberta
Posts: 353
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Re: 5.3 SWAP Wiring Problem
I feel your pain, it took me 3 weeks of more then just sundays to get mine going. I rewired and reprogrammed with EFI Live myself. Went to start it and had no injector pulse and no spark. I rechecked every pin on the ECM and traced a lot of the wiring... LONG story short I reflashed it with a different vin and it started right up........ But man, all the hate was gone when the sound of open headers scares the crap out of you.......
Trevor
__________________
1968 short box stepside. 2007 5.3L 4L60, tuned w/EFI Live 2005 Silverado bucket seats. Dominator 2600's all around. Porterbuilt tubular control arms. Magnaflow 3" dual exhaust. |
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Tags |
2007, 5.3, diagram, harness, wiring |
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