Why won't my car idle right? |
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Why won't my car idle right? |
BPGREER |
Nov 16 2004, 06:36 PM
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#1
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Member Group: Members Posts: 131 Joined: 29-September 04 From: SAN FRANCISCO Member No.: 2,857 |
OK, I'm once again stumped. My car just won't idle smoothly. It sounds like it's going to die, but then revs itself up a bit, then almost stalls again, then revs again... So, I thought it might be a vac leak. I had already replaced all of the hoses, but found that I had leaks on the air intake runner things, where they connect to the plennum. So, I disassembled everything, replaced those hose-type things, and voila! No more vac leak there. Problem is, still not idling right. It's just as bad now as before. One more thing, I slowly brought up the rpms from the throttle body, to listen, and I think I heard a couple of really quiet backfires. Maybe an exhaust leak? Could this cause a bad idle? Thanks.
Brian |
mike_the_man |
Nov 22 2004, 04:13 PM
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#2
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I like stuff! Group: Members Posts: 1,338 Joined: 11-June 03 From: Regina, Saskatchewan, Canada Member No.: 809 |
Yup, we're all doomed to eratic idling.
Hmmm, turning the ECU knob ccw should lean out the mixture. Usually a lean mixture causes hunting. Did you try turning it cw? What happened when you did? How does the car accelerate? Is it just at idle that it runs poorly? If so, then it's not likely an injector, although it is possible. You could try pulling off spark plug wires one at a time. If you pull on off and there is no change in the idle, then there is something wrong with that cylinder. Either fuel or spark. Another thing to check is your MPS. Does it hold a vaccuum? Also, how much vaccuum is your engine pulling at idle? I believe it should be around a steady 15in/hg at idle. I'm kind of starting to guess here, but keep posting and I'm sure we can figure this out. I know how frustrating it can be, I've been there myself. |
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