Mechanics

JAG RUNNING ROUGH

1986 Jaguar XJ6 • 6 cylinder 2WD Automatic • 53,000 miles

86 jaguar xj6 running rough and does not want to idle, also gas pooling in intake, checked pressure reg. Replaced cold start inj, plugs.
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Jtech31
February 28, 2011.



I believe it is common for jags to leak from the hoses coming in from the railing. I had the same problem; I saw some gasoline pooling near the intake but also saw a wet hose. So I tightened it, and then read up on it. Found out. It happens. So always keep a screwdriver in your car. About the rough idle. It is also something that i'm always batlling with. So far, I can make her idle on Park/Neutral at 700-800rpms. Achieving this with the "idle SPEED screw". But when I pull it into Drive, she has fits about it.
So then I go to the idle MIXTURE screw (that, for some reason, no one dares mention)
and when I screw it in all the way. The car keeps running, which boggles me (car shakes but stays on). I notice that if I only unscrew it 1 or 1.1/2 turns out. It idles better. But I don't know this to be a good thing.

Tiny
Alfredxj683
Aug 6, 2011.