1990 Chevy Corsica Engine runing rough

JLAW01

MEMBER
1990 CHEVROLET CORSICA
6 CYL
FWD
AUTOMATIC
100,000 MILES

My car starts running rough. There is a bad vibration and a loss of power. Sometimes I smell raw fuel when it starts running rough. Almost like the plugs are fowling out. I have been told it could be the coil pack but there are three of them. It doesn't do this all the time but it's almost like it's flooding. Someone else told me that it could be the catalytic converter. Does anybody happen to know what it is?

Sunday, February 17th, 2008 AT 7:58 PM

1 Reply

WAYNE UNDERWOOD

MEMBER
2 POSTS

There are 3 ignition coils, each coil sends spark to 2 plugs. They are located on the lower front of the motor, you can follow the spark plug wires down to them. The first coil controls plugs 1 + 4, the second controls plugs 6 + 3, the thrid controls plugs 2 + 5. When the car is in this rough running mode, you can find out which cylinder is missing buy pulling off each plug wire, one at a time, when you come to the plug wire that dose not effect the engine, thats the one thats not firing. You can take the coil off, there are two small bolts, size 5.5mm, or 6.5mm. You can take them to your local auto parts store and they can test them, and they run about $30 for each coil.

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Saturday, March 1st, 2008 AT 11:56 PM