Tbi to tpi.
11-11-2023, 03:13 PM
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Tbi to tpi.
I am swaping a 1991 camaro tpi in a 1992 c1500. Got fuel pressure, pump cycles and will start with Spray carburetor cleaner in throttle body and will run, but no injector pulse. Bought universal harness from speedway. Have ecm out of 1991 camaro. Thanks
Last edited by frankwebb1975; 11-11-2023 at 04:34 PM.
11-11-2023, 05:51 PM
#2
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Car: 92 Firebird, 77 Trans Am SE, 86 Z28
Engine: 5.7 HSR, T/A 6.6, empty
Transmission: T-5, TH350, T-5
Axle/Gears: 3.08 posi, 3.23 posi, 3.23
Re: Tbi to tpi.
Was the vats removed on the ecm? If not, it's looking for that signal at the moment
11-11-2023, 06:06 PM
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Car: '86MCSS
Engine: 396 .030"
Transmission: M20
Re: Tbi to tpi.
I second the motion...your truck never came with VATS but the TPI of that era did. It can be programmed out of the PROM or the appropriate signal generator can be added to make the ECM happy.
11-11-2023, 06:08 PM
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Re: Tbi to tpi.
I was wondering that. I bought the bypass module. was looking for some guidance or a diagram to bypass vats with module, painless 64023. thanks
Last edited by frankwebb1975; 11-11-2023 at 06:21 PM.
11-11-2023, 06:15 PM
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Car: '86MCSS
Engine: 396 .030"
Transmission: M20
Re: Tbi to tpi.
https://www.thirdgen.org/forums/elec...ts-bypass.html
I didn't read it myself but I think this will shed some light on the topic... lol
I didn't read it myself but I think this will shed some light on the topic... lol
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