i have a 1987 iroc 350 tpi the car runs great when your driving normal got on the freeway got up to 90 in the street runs fine but when i decide to floor it or just floor it half way that car does not accelerate just stumbles and does not move it does no turn off but it feels like its not getting any gas what could be the problem

 

I would test your TPS sensor.

 

ok i took the tps sensor down to autozone and they told me it was bad so i go a new and i installed it i dont know if i still need to adjust it how can i adjust it or what other possibilities are they thanks

 

If you put a new TPS in you will have to adjust it. See if you can find a friend with a scanner to hook up to your OBD1 port. Then you can go in and read live data with the ignition key forward and the scanner hooked up. Got down to the TPS section and have him watch the numbers as you adjust the sensor. I cant remember the exact specs but you want it to be around .5 with no throttle and 4.5-5 WOT. (CAR NOT RUNNING) lol

 

is there another way to do it if i cant get a scanner

 

I Have a 92 RS 305 TBI 5 speed, I recently did a tune up on it. Changed all of the usual tune-ups, plugs,wires, rotor, distributer, cap. The ususal. Have you fixed your problem. Mine is doing the same thing. I go to get on it and the car won't go it's like the fuel and air aren't mixing right. When I slowly accelerate it goes. Still can't floor it though. I'd appreciate if you did fix it, to shed some light for me thanks.

 

figure out what spec is and closed throttle (idle). should be something like .6-.8 volts. use a digital volt meter and signal wire then other to ground and measure it. move around til ya get it right

 

I had the same problem on my 91 z28 5.0 I eventually changed my tps(non adjustable kind) and car did the same thing I eventually put in a new FP and filter car ran better but eventually died and I haven got it started since however I got my mechanic friend with scanner hooked it up everything was normal and found I have some dead wires going to the ignition mod.not sure what to do next....I hope the tps fixes your prob just thought I would put in my 2 cents....

steve

 

no i havent fixed it i chaged the iac dindnt do anything got the voltmeter so gona check the tps tommorow and also im goin to check myfuel pressure

 

hey guys check your fuel pressure if its good i would check my timing next