MAF sensor on 84 XK engine (Federal) -- is this the warm idle adjustment screw?
Forgive me if this has been answered, but I've searched and couldn't find it.

My 84 XJ6 (Federal, California) runs fine while cold, but idles low (~700RPM) when warm, and gets rough and sometimes stalls. Shifting into neutral helps but not enough.

As a first step I thought about trying to adjust the warm idle. I've seen this discussed at length in various places, but I'm having a hart time visualizing the location of the proper adjustment screw. I've attached a photo of the MAF sensor on my car (best angle I could get). I added an arrow. Is this the proper screw to use to adjust it?

I don't want to adjust the wrong screw on the MAF if I can help it. I have enough trouble with this sort of thing without digging a deeper hole for myself.

Thanks in advance,
-James

 

That's the mixture adjustment, not warm idle speed.

Cheers
DD

 

Idle Speed Adjustment

Cheers
DD

 

^^ thank you. I've read that and I've looked, but for the live of me I just cannot find it. Does anyone have a photo of it?

 

Go to post #5 of this thread

https://www.jaguarforums.com/forum/x...-screw-141875/

Cheers
DD

 

Idle trim (RPM) adjust is about 1" inboard and 3" down (from your yellow arrow point) on the intake manifold.. covered by vacuum lines et. al., but it is there. in an aluminum fitting. see red arrow
Rgds
David


On intake manifold below red arrow

 

Thank you both, Doug and David. I'll see if I can locate it.

 

James,

Once you find it, you will be wondering how to get a tool into that location to do the adjusting??? Dozens of solutions by clever Jag owners, this is the one that I copied, can't remember who posted it, but it works for me, and can be found in my trunk emergency kit.
Rgds
David



7/32 Allen wrench with a little propane heat and a vice to bend into position.