performance gets worse as engine gets warm

1995 OLDSMOBILE AURORA
V8 • AUTOMATIC
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Z1019
  • MEMBER
  • 3 POSTS
When I first start my car, it does just fine. As it warms up, performance gets worse. Terrible acceleration, very rough idle, and my mpg is around 10. Also have a bit of a clunk/pop that develops when its warm, sounds like a
tennis ball in a metal shoebox. So far, I've replaced the cat converter (which was bad, but didnt fix the problems). New plugs and wires are next on the list, but I was just wondering if anyone may have any suggestions as to what else I should check out.
Jan 23, 2011 at 4:17 PM
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JACOBANDNICKOLAS
  • CAR REPAIR CONTRIBUTOR
  • 110,190 POSTS
If the check engine light comes on, have the computer scanned. Most parts stores will do it for free. Ceck fuel pump pressure. Check it for a tune up. Check for vacuum leaks.
Apr 4, 2011 at 3:18 PM
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