04-11-2013, 05:38 PM | #1 |
Registered User
Join Date: Dec 2011
Location: bryants store ky
Posts: 33
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350 engine problems
ok i have a 54 chevy on a s10 frame with s10 wiring harnes for a 4.3 i put a 89 350 with tpi fuel injection changed the computer i have it running but it surges up and down an then it quits will strat back but it still surges anybody have this problem how did you solve the problem
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04-11-2013, 08:02 PM | #2 |
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Join Date: Sep 2012
Location: Oregon
Posts: 3,303
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Re: 350 engine problems
So you have wiring for a 4.3 and an ecu for a 350...what other electronics are 4.3? is the tbi 4.3 or maf/map/temp etc?
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04-11-2013, 09:59 PM | #3 |
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Join Date: Dec 2011
Location: bryants store ky
Posts: 33
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Re: 350 engine problems
i have changed the tps,map,egr sensor ,computer , throttlebody temp sensor the only thing that i havent changed is the distributer and wiring harness
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04-11-2013, 10:19 PM | #4 |
Senior Member
Join Date: Jun 2011
Location: North Beaver TWP PA
Posts: 833
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Re: 350 engine problems
You might want to spend some time here reading the info. http://www.lt1swap.com/
I believe you may need to swap a couple wire pins around at the computer plug depending on what computer you are using. Not sure if that is your issue but there is a wealth of knowledge on that site. You could email Brendan (its his site) and he will help you. He sent me wiring schematics to help me convert from a vortec 350 to vortec 454 using a newer style computer.
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04-12-2013, 12:08 AM | #5 |
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Join Date: Jul 2007
Location: Toppenish, WA
Posts: 15,708
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Re: 350 engine problems
Are all of the sensors hooked up as they should be/ My little drive to work box with wheels is doing pretty much the same thing and I found that a wire to one of the temp sensors got broken during a trans swap when I was moving things around. All the wires and hoses are in the same spot just over the bellhousing part of the trans on that particular car. A sensor that isn't hooked up or working correctly may be the issue.
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Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around. |
04-12-2013, 02:03 PM | #6 |
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Join Date: Feb 2012
Location: Camano Island, WA
Posts: 166
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Re: 350 engine problems
Did you repin the wiring harness to match the TPI ECM? Going from a TBI wiring harness to TPI isn't a simple process.
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