Mechanics

WON'T RESOND ABOVE ROUGH IDLE, THROTTLE TO THE FLOOR

1994 Chevrolet Cavalier • 180,000 miles

1994 Cavalier 2.2L 4 cyl. Manual trans. When I start it, I have to have gas pedal floored & keep it there or it won't stay running. Runs at a rough low idle. Some days I can get it to run (gas pedal released) idle a bit rough, but it will respond to pressure on pedal. I drove it down to the mailbox & back ( about 2 blocks) & it goes back to above mentioned response. Any ideas? Thank you for any help.
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Rndotson65
June 21, 2012.



Sounds like the cat converter is blocked and needs to be replaced. It can be confirmed with a back pressure test.

Roy

ASEMaster6371
Jun 21, 2012.
Remove any deposits that might prevent a good seal between the IAC valve

Tiny
Renegade65
Jan 4, 2013.