1991 Chevy Caprice

Tiny
PHANTOM2000
  • MEMBER
  • 1991 CHEVROLET CAPRICE
1991 Chevy Caprice V8 Two Wheel Drive Automatic

hello, I have 1991 chevy caprice classic with roughly 150k on it.
one day I was coming from work, driving in highway doing 65 then after I took the exit stopped for traffic light, my car started shaking with rough engine idling & loud exahust sound.
I took it to a local mechanic who told me to change spark plugs, ignition wires, fuel filter and even TBI unit, I did all of that.
The problem still there with poor fuel economy + engine seems less powerfull than before+ difficulty starring the car.
can you help me, is it oxygen sensor, bad catalytic converter or PCV valve.
P.S : the emechanic did not have code scanner.
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Wednesday, October 1st, 2008 AT 1:36 PM

3 Replies

Tiny
RASMATAZ
  • MEMBER
Have the exhaust system check for restriction-could be the catalytic converter-also check the idle air control valve/EGR and PCV valves-throttle position sensor/MAF/MAP sensors-
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Wednesday, October 1st, 2008 AT 4:59 PM
Tiny
JUSTINC
  • MEMBER
When my EGR valve went out in my 88 Buick park ave I began having a loss of power and poor MPG. Starting was fine though
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Friday, December 12th, 2008 AT 7:37 PM
Tiny
RASMATAZ
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Check the EGR and the rest of the stuffs I've mentioned-then comeback with some results
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Friday, December 12th, 2008 AT 7:41 PM

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