High idle on 90 TBI HELP Please !!
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Car: 87 Iroc 5.7,67 SS Camaro,90 Formula
Engine: 355 AFR Superram LPE 219
Transmission: 700r4 3000 stall 4spd 5 spd
Axle/Gears: 3.27
High idle on 90 TBI HELP Please !!
Hello. I recently bought a 90 Formula 305 5 speed. Stock tbi stock heads and stock cam. Car had a chip burned to eliminate vats. Car just had new head gaskets, new reman TBI unit and new injectors(stock) put on and headers installed all at the same time. Smog was deleted. Car has a new fuel pump. Car idles very high, around 1200 rpm even when warm after driving . Car ran fine when it was stock, the old tbi had a bad injector and leaking throttle shaft so the tbi unit and inj was replaced. Car has new plugs,cap ,rotor, wires tps IAC. Fuel filter was done last year, I will replace that to see if that is causing the high idle. Maybe a vaccum leak or egr. Has open elelent air cleaner. I want to buy a stock air cleaner back on to help eliminate that Car has 02 sensors still.
Last edited by mrestrictrplate; 01-25-2018 at 08:31 AM.
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Car: check
Engine: check
Transmission: check
Re: High idle on 90 TBI HELP Please !!
If the thermostat was replaced with a lower temperature unit put a 195 back in. If the IAC steps (scan tool required) is at zero then look for a vacuum leak.
Note that the fan isn't ECM controlled, so can't burn a chip to lower the fan on/off temperatures.
RBob.
Note that the fan isn't ECM controlled, so can't burn a chip to lower the fan on/off temperatures.
RBob.
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Car: 87 Iroc 5.7,67 SS Camaro,90 Formula
Engine: 355 AFR Superram LPE 219
Transmission: 700r4 3000 stall 4spd 5 spd
Axle/Gears: 3.27
Re: High idle on 90 TBI HELP Please !!
I will check the thermostat and Iac. Will the headers make a high idle with the stock 02 sensor? Will a heated 02 help at all. The previous owner did a vacuum check with spray. I will try to have a smoke test done to find the vac leak. Thanks for your help.
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Re: High idle on 90 TBI HELP Please !!
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