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 |
Bleyseng |
Nov 17 2004, 09:00 AM
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#2
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Aircooled Baby! Group: Members Posts: 13,035 Joined: 27-December 02 From: Seattle, Washington (for now) Member No.: 24 Region Association: Pacific Northwest |
First set the timing to spec. 27 degrees BTDC at 3500rpms
Secondly, since yours is a 73 2.0l do you have the ballast resistor for the CHT and the right I think its the 017 CHT? You will never get it right if you don't have the right parts. Then adjust the idle setting when the engine is hot. There must be no vacuum leaks so all vacuum hoses should be fairly new soft and have a tight fit when they plug in. Like Andy said use a brake cleaner to test for leaks. Test the AAR valve to make sure its closed after 5 minutes of running. These things tend to rust inside and not close or open. Now adjust the idle rpm with the air bypass screw and the idle mix adjustment on the ECU as VSG914 said. You should have one or its been swapped out. Geoff |
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