Miss At idle and Check Engine Light only at 40 and above!

Tiny
MECHANIC7120
  • MEMBER
  • 1940 CHEVROLET
I have 2. First I have a 1995 Chevy Cavalier 2.2L Automatic Tranny. I have a miss at idle and the idle speed is under 600rpm. I have changed plugs, plug wires, new coil packs, new head, new IAC. The car misses at idle but runs good out on the road. My second problem is the check engine light comes on after 40 mph. Scanner is telling me it is EGR I replaced it and the solenoid. Can anyone help me with theses 2 problems. Thanks mechanic7120 :( :(
Do you
have the same problem?
Yes
No
Sunday, December 17th, 2006 AT 9:29 PM

3 Replies

Tiny
KENVCR
  • MEMBER
2nd problem first. Did you unhook your battery at any point, during repairs? If no, go out and unhook it for a about 1/2 hour on that car. This will reset your fault codes to zero on the computor.
Then we can start fresh.
After rehook of battery, start and let warm up for about 5 mins. Then go for a short cruise but try to get to all driving ranges(stop/go, min speed limit, higher speed etc.). Do you get service engine light, how does your car perform? Are your drive belts as tight as they should be?
Usually rough idle if it just appeared will have something to do with whatever you have done.
Lets start there.
Let us know what happens and I can go through it with you on my Cavalier.
Kenvcr
Was this
answer
helpful?
Yes
No
Sunday, December 17th, 2006 AT 10:11 PM
Tiny
MECHANIC7120
  • MEMBER
This car has been doing this since I got it and I have cleared the code it gives me 32 EGR. I have drivien like you said and it is still the same. I have changed the TCC solenoid the plugs the wires the coil packs new head new iac new egr and solenoid. New belt and tensioner
compression is good on all cyleders. Could a worn timming chain cause this miss condition? The 2.2 GM stock chain and gears make alot of noise.I have changed alot of them. :(
Was this
answer
helpful?
Yes
No
Monday, December 18th, 2006 AT 10:11 AM
Tiny
KENVCR
  • MEMBER
A worn timing chain may make a lot of noise, but will not cause the problems you speak of. UNLESS your chain has skipped a few teeth.
If you have a lot of experience in this area, inspect it, see if the timing marks line up.
Unfortunately I can only think of the small vac hoses that might have a leak. Test each one.
Since you mention the timing chain, and a new head, Check that your bolts are torqued and the chain is installed properly.
Kenvcr
Was this
answer
helpful?
Yes
No
Monday, December 18th, 2006 AT 12:59 PM

Please login or register to post a reply.

Recommended Guides