91 z28 idling problem

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91 z28 idling problem

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Camaro >> Camaro Models >> 3rd Generation >> IROC/Z28 >> 91 z28 idling problem

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91 z28 idling problem - 8/11/2008 9:36:57 AM

mike83camaroBA

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Joined: 3/6/2005
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ok i have 91 z28 305 automatic, after the car warms up it starts to run like crap thie idle goes up and down, than it will seem to fix itself for a few seconds and start doin it again, i can even feel power surges while driving, that has just started recently. has anyone experienced this problem, i amd thinking posible the TPS. i have chnaged all ignition complinents except the pick up coil and distributer. if i put the car into neutral at the light the idle gets better but still not 100%. and help would be greatly appreciated.

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RE: 91 z28 idling problem - 8/19/2008 12:49:33 PM

detailer57

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Joined: 3/14/2008
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TPS, not sure if you have an IAC motor or not, O2 sensor, it is not tune up related. also might be a fuel flow issue. What color were your plugs?

(in reply to mike83camaroBA)

Post #: 2

RE: 91 z28 idling problem - 9/1/2008 10:26:01 AM

mike83camaroBA

Posts: 11
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Joined: 3/6/2005
Status: offline

well i did a TPS sweep and that checked out fine, i do have an IAC motor, the O2 sensor voltage stays between .49 and .52 volts and moves very slow. i still have to ohm out the injectors

(in reply to detailer57)

Post #: 3