ok my iroc is dying its hard starting, i cant chirp thw wheels anymore and when i step on it it boggs down... it has new plugs,cap,rotor,wires,all fluids.

mods are in sig
i was told the hard starting could be the fuelpump relay?? anything else a prob

-Stell

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1988 IROC 305TPI MINT!!
Mods= Accell SuperCoil, MSD 6A, Ported Plenum, No MAF Screans , K & N, 160 Thermostat+ Temp Switch
And Always Trying To Go Faster

 

The best way to find out what is wrong is to hook up a scan tool. It will tell you exactly what the computer is seeing. I used one for the first time 2 weeks ago and I am convinced that they are the ONLY way to work on a computer controlled car. Without a scan tool I would start by checking fuel pressure. Are your injectors/fuel filter clogged? Make sure the wires in your maf are still there. The screens are there for a reason. Is your tps voltage set properly? Is your o2 sensor relatively new? I think that the problem is in insufficient fuel deliverly however, I was just throwing out ideas.

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82 z28 350cid, vortec heads, comp 262h cam, Holley 600cfm carb, 2in twice pipes, MSD ignition, turbo 350 trans, 3.73 posi

 

I've just started getting the same problem too... it bogs down the more I push the pedal and it sometimes completely stalls when I floor it... I had this problem before with that '87 listed below and sent it to my mechanic because I thought it was the fuel pump and turns out it was. The car ran fine after that, but it had the EXACT same symptoms that I'm seeing now. I've thought it could be the fuel pump relay but I don't know where it is or how to test it. I'm looking into replacing my own fuel pump right now though. Its a b*tch to change and I might just send it to my mechanic to do.

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'91 Firebird
305/TBI/700R4/T-tops all stock
K&N Air Filter
Pioneer DEH-P8200R
Pioneer 6x9's
Kenwood 8" Tube

'87 Firebird
2.8L/MPFI/700R4/220K Miles on its original, never been rebuilt engine!
Car being parted and sold, just ask what I have.