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Unread 04-24-2002, 09:42 AM   #1
keybo
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Join Date: Nov 2001
Posts: 11
88 YJ IDLE PROBLEM

I HAVE AN 88 YJ 6 CYC THAT HAS A IDLE PROBLEM. IT IDLES UP TO 1500 RPMS AND STAYS THERE LIKE THE CHOCK IS STUCK OPEN BUT I HAVE HAD A MECHANIC LOOK AT IT AND HE CAN'T FIGURE OUT. ANY IDEAS ???

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Unread 04-24-2002, 12:34 PM   #2
89JEEPNYC
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Location: New York
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How long does it idle high for? Because normally it idle's high till the engine is warm then kicks down the idle.
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Unread 04-24-2002, 02:21 PM   #3
Zeke
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Join Date: Mar 2002
Posts: 22
Hey,

What this sounds like is the Idle Speed Soleniod - or the Sol-Vac soleniod. This is a soleniod that makes it idle at 1100 RPMs for about 15 seconds after you start the car. It is located near the throttle linkage, it just pushes out a cylinder so that the idle screw rests on it. The car will run fine without it, so just disconnect it and push the cylinder in. It might not stay in, so you may have to tape it. See if that fixes your problem.

If you're having trouble finding it, check out this page:

<a href="http://home.sprynet.com/~dale02/solvac.htm" target="_blank">http://home.sprynet.com/~dale02/solvac.htm</a>

I've got other ideas, so drop me a line if that doesn't work.

Zeke
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Unread 04-24-2002, 04:57 PM   #4
johny1i
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Join Date: Mar 2002
Location: Crestview, Florida
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Zeke's right about the Sol-vac, eliminate it. Its primary function is to speed up the engine to compensate for the added load when your air conditioning compressor or rear window defroster is turned on, but what can happen (and what happened on mine exactly) is that it stops retracting the arm when the vehicle is warmed up or the AC is switched off, thus leaving your jeep idling at--like you said--about 1100-1500 rpm. Zeke mentioned taping it off, but I removed it completely, including its mounting bracket, and plugged the vacuum line that used to lead to it at its source. I still run my AC, but the drop in RPMs is about 100-200, hardly enough to worry about. Beyond this, make sure that the fast idle cam (the yellow plastic thing with four "steps" on it) has "dropped" out of the way when the engine is warm--it should be a little bit loose to the touch to make sure that your idle is being dictated by the primary idle speed screw, not the fast idle screw that rides on this fast idle cam. Try this stuff and let us know.
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