 Still hunting at idle |
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| ChrisReale |
 Feb 20 2003, 10:46 PM
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#1
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Sleazy  Group: Members Posts: 2,665 Joined: 20-January 03 From: San Francisco Member No.: 176  |
I just had my valves adjusted. I have all correct 1973 2.0L ECU, MPS, CHT and ballast resistor. The mechanic did an exhaust analysis, and it is running 3% (not rich, but not lean...??) I still have a hunt at idle. Only bounces between like 900 and 1200 rpm, but its driving me crazy. I have checked for vacuum leaks, and found none. Wierd thing is, I have two ECU's and both have shown no change in rich/lean when the pot is turned (on the Co.analyzer). Is this a wiring harness problem? It seems to be getting beyond my knowledge of troubleshooting
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Replies(1 - 6)
| Jeffs9146 |
Feb 20 2003, 11:25 PM
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#2
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Ski Bum Group: Members Posts: 4,062 Joined: 10-January 03 From: Discovery Bay, Ca Member No.: 128 |
I have no idea if this will help but mine was doing that before i found out the head temp sensor was stripped out. Eventualy it lost so much contact that it would die when warmed up.
Good luck Jeff |
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| AZ914 |
Feb 21 2003, 12:16 PM
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#3
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914 Dumbass Group: Members Posts: 1,459 Joined: 6-January 03 From: Sunny Tucson Member No.: 98 Region Association: Southwest Region |
Chris/Jeff,
Mine is doing the same. Either hunts up and down, or just barely idles, no matter where I have the idle screw adjusted, or the mixture nob on the ECU. NOW, when cold, it idles just fine. I can tune the idle adjuster to the proper RPM but once warm, it barely idles. Jeff, thanks for the tip on the CYL HEAD TEMP wire. I'll check it. |
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| Jeffs9146 |
Feb 21 2003, 01:23 PM
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#4
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Ski Bum Group: Members Posts: 4,062 Joined: 10-January 03 From: Discovery Bay, Ca Member No.: 128 |
In addition to checking the wire, check the threds holding the sensor to the head.
Jeff |
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| ChrisReale |
Feb 25 2003, 07:12 PM
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#5
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Sleazy Group: Members Posts: 2,665 Joined: 20-January 03 From: San Francisco Member No.: 176 |
Finally go tthis beast fixed. It was a combination of the throttle switch, the idle screw and the ECU knob. It idles a bit high right now, a touch abouve 1000 rpms, but I think that will work for now (IMG:style_emoticons/default/beer.gif)
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| Van914 |
Feb 25 2003, 07:57 PM
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#6
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Van914 Group: Members Posts: 698 Joined: 5-January 03 From: Cincinnati, Ohio Member No.: 90 Region Association: Upper MidWest 
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Try adjusting the Aux Air Device. It is the one with the small hose on a threaded barb. You can adjust it in or out and it does help.
(IMG:style_emoticons/default/biggrin.gif) Van |
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| Dave_Darling |
Feb 25 2003, 08:02 PM
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#7
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914 Idiot Group: Members Posts: 14,986 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California
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Van, it sounds like you're describing the Decel Valve. Adjusting that shouldn't help if the valve is functioning correctly... The AAR is not adjustable.
Chris, it's probably a vacuum leak. Smaller possibility that it's the timing. --DD |
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