Question about 1991 Chevrolet Corsica
Rough idle, especially when at operating temp. Idle is OK cold. Seems to run just fine when driving down the road, but at stop signs, has very bad shake. Putting it in neutral helps a little. I have changed spark plugs and wires and cleaned throttle body best I can. New fuel filter and air filter. I know that number two spark plug hole has been stripped and resealed with HeliCoil (?) by previous owner. Low compression in that cylinder. Also has slight coolant leak out of head gasket, front of engine, driver side. No other leaks, oil is clean, in fact, it does not burn oil at all!
I take it by previous comment that the egr valve solution given to you was wrong and i`m betting you checked the vacuum line that went to it. My guess is the catilitic converter is burned out causing loss of compression try just turning idle screw up a little or spend money on new converter That piston compresion on that one kind of worries me i hope it han`t gone to bad yet
Posted on Sep 03, 2009
Testimonial: "Thanks for your help. I tested the EGR and it seems to be working, also the vacuum lines. New cat conv is probably worth more than the car!. "
It is a bad EGR valve.
Posted on May 01, 2009
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Dec 30, 2013 | 1995 Jeep Cherokee
Apr 12, 2013 | Chevrolet Tahoe Cars & Trucks
Mar 09, 2013 | 1996 Ford Thunderbird LX
Aug 13, 2010 | 1994 Mazda 2WD B Series Pickup
Jun 19, 2010 | 1994 GMC Suburban
May 25, 2010 | 1991 Buick Park Avenue
Sep 17, 2009 | 1988 Honda Accord 4 Door
Jul 01, 2008 | 1991 Toyota 4Runner
317 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: