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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: What's the correct idle speed for an 89 XJ40?
Randy, Perhaps this has been my problem all along. I can set the idle speed with that air bleed screw, and it will stay put. From your reply, I can assume that 1) my IAC has never worked right or 2) My air bleed screw is in too far or 3) both. You may remember in previous posts that I had a problem with surging and stumbling, which I "corrected" by disconnecting the Throttle position potentiometer. After doing this, the idle ran up to 1500, and I adjusted it down to 700 using the air bleed screw. Of course, this is still not '"fixed". I still have to determine if I have a bad TPS, or if the computer is misreading the signals. I have read in previous posts how to adjust the throttle gap (.02, if i remember right) Is that metric or inches? Once i get that right, is there any way to correctly set the air bleed screw? (Without the high-tech Jag diagnostic equipment). One last note -- has anyone on our list considered the possibility of designing a PC-link and software to do Jag diagnostics? Mike ---------- > From: Randy Wilson <randy@taylor.infi.net> > To: jag <jag-lovers@sn.no> > Subject: Re: What's the correct idle speed for an 89 XJ40? > Date: Monday, February 03, 1997 7:06 PM > > > > > > >Actually, the label says "Idle speed is factory set and cannot be = > >adjusted". This, of course, is crap. > > > >Correct idle speed for XJ40 3.6L should be 700 RPM +/- 50, set with the = > >allen keyed adjuster on the air bypass -- NOT at the throttle housing.=20 > > This is not crap if the IAC is working properly. Turn the allen screw in > half a turn, and the idle speed will fall a bit... then rise right back to > the original point. It will continue to do this until you get the bleed > screw wound so far that you overshoot the IAC's control range. > > This, of course, is for US spec cars. Other markets may not behave in > the same manner. > > > > >Mike Everatt > >1987 XJ40 > > > > > Randy K. Wilson > randy@taylor.infi.net Follow-Ups:
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