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Won't resond above rough idle, throttle to the floor

Tiny
RNDOTSON65
  • MEMBER
  • 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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Thursday, June 21st, 2012 AT 7:21 PM

2 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Sounds like the cat converter is blocked and needs to be replaced. It can be confirmed with a back pressure test.

Roy
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Thursday, June 21st, 2012 AT 7:29 PM
Tiny
RENEGADE65
  • MEMBER
  • 29 POSTS
Remove any deposits that might prevent a good seal between the IAC valve
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Friday, January 4th, 2013 AT 12:44 AM

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