TPI Surging After letting off Throttle
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Joined: Apr 2010
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TPI Surging After letting off Throttle
I have a Jeep with a TPI unit on it. It was out of a 90' camaro with the MAP. If runs fine, throttle response is good and is at .55v but I keep having a problem when i let off the throttle it revs higher but i can tap the throttle real quick and it will idle down kinda like a carb. I checked all my vacum lines and everything is blocked off except the brake boost, map vac. line, and the vac line for the fuel thing on the back of the fuel rails. I don't know whats up with it. I have looked stuff up on it and people say replace the IAC but i don't know if that's it or not.
Joined: May 2009
Posts: 4,915
Likes: 40
From: Far West
Car: 1986 Camaro Z28 IROC-Z
Engine: 350 Tuned Port Injection, for now.
Transmission: 700R4
Axle/Gears: Posi - 3.23
Re: TPI Surging After letting off Throttle
Is there a way that you can pull any trouble codes?
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Joined: Aug 2005
Posts: 293
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From: Hotlanta, GA--- Home of the Bandit!
Car: '89 5spd GTA
Engine: 305(LB9) TPI
Transmission: T-5
Axle/Gears: Borg-Warner 3.42
Re: TPI Surging After letting off Throttle
Ohm out your fuel injectors, should be around 13ohms each....just had the same issue and it was two bad injectors...replaced and cured the problem
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