Car misses, stalls occaisionally
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Supreme Member
Joined: Sep 2000
Posts: 1,075
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From: Bowmanville,Ontario Canada
Car: 1990 Iroc Z Convertible
Engine: LB9
Transmission: 700R4
Car misses, stalls occaisionally
My car will develope a miss after it warms up, on occaision it will stall but starts immediatly without problem. It will also stall occaisionally if I stop and change gears(park or reverse). The parts I have replaced are
New injectors
New cap,rotor wires
Ner egr valve
New egr solenoid
New Fuel filter
New coil
New K&N air filters
A neighbour who is a mechanic thinks it might be the ignition module. The mechanic who I've taken the car to(diagnosed the bad injectors) says that Ignition modules are like light bulbs, when they go your car won't start. I don't want to waste money on any more parts to fix this problem, please help..
New injectors
New cap,rotor wires
Ner egr valve
New egr solenoid
New Fuel filter
New coil
New K&N air filters
A neighbour who is a mechanic thinks it might be the ignition module. The mechanic who I've taken the car to(diagnosed the bad injectors) says that Ignition modules are like light bulbs, when they go your car won't start. I don't want to waste money on any more parts to fix this problem, please help..
Senior Member
Joined: Nov 2000
Posts: 661
Likes: 1
From: Beaver,PA,USA
I think I had a similar problem about a year ago.
When the engine heat soaked (2-4 heating cycles up to 220 and back to 160), the car would stall usually at low rpms, like when stopping at a stop light. I changed the O2 sensor (didn't fix), plug wires (didn't fix), then I started dumping BG injector cleaner in even more often then recommended. It went away. I have no idea if it was a dirty injector or something else...
When the engine heat soaked (2-4 heating cycles up to 220 and back to 160), the car would stall usually at low rpms, like when stopping at a stop light. I changed the O2 sensor (didn't fix), plug wires (didn't fix), then I started dumping BG injector cleaner in even more often then recommended. It went away. I have no idea if it was a dirty injector or something else...
Supreme Member
Joined: Jan 2001
Posts: 1,746
Likes: 0
From: Tucson, AZ
Car: 1991 Z-28
Engine: Can you say stroke?!?!
Transmission: 700-r4
Axle/Gears: 3.42
Yeah, what about the plugs? Any ways, from what I've seen it could be the module. Another thing, do you have an after market chip in it? I had a similar problem when I bought mine and after going through the same things I figured it had to be a bad ECM. Took it appart and found an ACS(I think) plugged in. Removed it and the car never had a problem after that. POS chips!
Last edited by CraZ-28; Jan 30, 2002 at 11:57 AM.
Thread Starter
Supreme Member
Joined: Sep 2000
Posts: 1,075
Likes: 0
From: Bowmanville,Ontario Canada
Car: 1990 Iroc Z Convertible
Engine: LB9
Transmission: 700R4
THe plugs are new bosche platinums, the e prom is factory. Do you think the IAC could be the problem?
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