It will run for a couple minutes then stall,it stalls at idle and only runs at higher rpms for a few minutes before ****ting out,and sometimes when driving at 50-60mph the gas pedal does not respond and it downshifts when I give it gas,it is not the transmissiopn though cause it works fine,we just replaced the fuel pump a moth ago,and the ignition module crapped out a few times before,it is one of these,what do you guys think????

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Drive it like you stole it

 

What kind of engine? A little more info would help too. Did you check for codes? Try all the little things first, especially sensors. Those little things can cause a world of trouble.

 

86 IROCZ LB9 305 tpi,what sensors could it be???

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Drive it like you stole it

 

It could be the fuel filter. Could be the CTS. What do you reckon are the odds of the FP being bad? I know you just replaced it, but it seriously sounds like youre having a fuel delivery problem. Which isnt very complex. Fuel Pump, Fuel line, fuel filter, fuel Pressure Regulator, and injectors.

Just my thoughts.

Good luck
Clayton

 

Check your fuel pressure first. Did you replace the fuel filter when you changed the fuel pump? If pressure is good, check out your MAF sensor.

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92 Camaro RS, LO3, 5-spd, T-tops

Performance:
K&N Open Air Filter, Edelbrock performer TBI intake, Fastchip Prom, Timing +4 degrees, Centerforce clutch, Xact 8mm wires, SLP 1 3/4" Headers (coated), Flowmaster Catback Exhaust, Z28 Grille w/aftmkt fog lamps, MacEwen white-face guages
Electronics:
Alpine 8030 Alarm System, Valentine One Radar Detector (How did I ever drive without one?), Pioneer DEH 7450 Head Unit w/6-pack CD changer, Pioneer DEQ 7600 Sound Processor, 2 Kenwood KAC-846 Amps powering 2 12" Pro Red subs, 2 Pioneer 6x9 and 2 MTX 4x6 speakers.
NEXT UP: TBI mods, 3.42 gears w/Torsen posi

 

In order to determine what sensors could be crapping out you need to pull the codes out of the ECM. Do you know how to do this?
bsa

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"If they do not run, Then they will die." - Stonewall Jackson
#3
'87 IROC, 355 TPI, Converted to SD, 700R4, B&M Megashifter, 3.42, Trick Flow Twisted Wedge Heads, Edelbrock Intake, Accel Runners, Comp Cam, Crane Gold rockers, Lucas 24# injectors, Edelbrock headers, Flowmaster 3'' exhaust, Mallory Ignition, Transgo Performance Shift Kit, Corvette Servo, 2,000 Stall Torque Converter

 

Usually when they stall, no codes are set...

I'd buy a fuel pressure guage, hook it up, run it under your pass wiper so you could watch it while driving...

If your fp stays rock steady (while stalling) I'd suspect a bad MAF (code 34 trying to set, especially on a 2.8 or 3.1, but you say you have an iroc so... I'd doubt it on a hot wire MAF) or pickup coil.

A scan tool would really help out...

 

Yea, mine has never thrown a code when it stalls. Hooked it up to a scanner twice and never showed anything. The third time it was hooked to the scanner it showed a bad CTS. There are several things it could be though. Good luck.

 

When I had a bad stalling problem the ECM showed a code 15 (CTS). Changed the CTS and repaired the wiring and the problem went away.
bsa