1991 Chevrolet Corvette


Ted Brister

October, 15, 2010 AT 11:28 PM

Engine Mechanical problem
1991 Chevy Corvette V8 Two Wheel Drive Automatic

Recently the Service Engine light started coming on when I reached speeds of 55 or 60 Mph for about a mile. When I killed the engine for about a min. And restarted; the light did not come back on as long as I drove at a slower speed. On one occasion I had to continue driving at a slower speed with the light still on and noticed fine smoke coming from the catalytic converter on the passenger side. The shop where I took it changed some fuel injectors, plugs and wires with no change. I then cleaned out the converters but it still idles rough. My question is could this problem possibly be solved by replacing both converters? Can hollowed-out converters cause such a problem? The mech. Used the analyser but was unable to do so when the light was on. Thanks for your help.


1 Answer



October, 15, 2010 AT 11:33 PM

Engine running rough or misfiring can be cause by the following: 1. Defective spark plug
2. Inadequate spark/coil, defective spark plug wire.
3. Lack of compression
4. False air leakage.
5. Faulty fuel injectors.
6. Insufficient fuel pressure.
7. Contaminated fuel.
8. EGR valve that is leaking.
9. Oxygen sensors.
10. Throttle position sensor.
11. Idle air control valve.

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