93 Mazda Protege - Rough Idle under Load

1993 MAZDA PROTEGE
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JOHN IN CVILLE
  • MEMBER
  • 2 POSTS
When I'm at a red light with my foot on the brake, the idle is rough and the car vibrates. If I shift into neutral the vibration goes away. The car runs very well otherwise. The motor/transmission mounts have been replaced. I could not find any obvious cracks in vacuum lines but it doesn't mean that they don't exist. Any ideas on where to begin to narrow down what might be causing my problem?

Thanks!
Dec 31, 2006 at 2:52 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Try checking the EGR system
Jan 1, 2007 at 11:33 AM
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1990PROTEGE
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  • 1 POST
have you figured out what is making it run ruff when stopped. I have a 1990 protege and it does the same thing.
Mar 28, 2007 at 7:25 AM
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JOHN IN CVILLE
  • MEMBER
  • 2 POSTS
[quote:5ac2536a42="1990protege"]have you figured out what is making it run ruff when stopped. I have a 1990 protege and it does the same thing.[/quote:5ac2536a42]

Not yet. I need to take it to a shop and have them remove and clean the EGR valve. I got a manual and tried to do it myself but between the location of it and the fact that it didn't match the manual I couldn't do it.
Mar 28, 2007 at 7:51 AM
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