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Registered
Join Date: Jun 2003
Location: Maine
Posts: 1,074
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I know ! RIGHT! another 3.2 idle hunt question
When I jumper the two pins in the round relay test port and adjust idle screw I get a good steady idle pulling the jumper results in surging and hunting again..
pulling the plug on the ICV while the jumper is out makes no difference .. still surging and hunting.. I thought the jumper was to cut out the ICV from the loop? but evidently not.. Waht am I actually doing when I put the jumper in place..?
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89 Mercedes 300E 77 911s TARGA 79 3.2 widebody 79 911 SC TARGA 97 BMW Z3 |
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07-18-2010, 11:31 AM
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I think the jumper is supposed to park the IAC valve in the center position.
I had hunting with an O2 sensor in a pre-muffler that didn't get hot enough at idle. Relocating the O2 to one of the pipes before the merge into the premuffler cured the issue. I also found a small vacuum line detatched from the back of the rubber snorkel ... a tiny thing without a clamp or anything. Didn't cause hunting, but roughened the idle up a bit.
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'88 Coupe Lagoon Green "D'ouh!" "Marge - it takes two to lie. One to lie, and one to listen" "We must not allow a Mineshaft Gap!" |
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07-18-2010, 02:14 PM
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muck-raker
Join Date: Jan 2009
Location: Coastal PNW
Posts: 3,059
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hunting can be caused by a few different issues, but is usually related to a rich condition. Do you know how to lean out your AFM?
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STONE '88 Cabriolet, using EP Slick 20w50 partial synthetic Snake Oil...just as Rommel intended.  Deny Everything; Admit Nothing; and Always Make Counter-accusations 
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07-18-2010, 06:43 PM
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Registered
Join Date: Oct 2004
Posts: 15,612
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could also be a bad vacuum leak(s).
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07-18-2010, 07:14 PM
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1988 Porsche 911 3.2
