Jag running rough

  • 1986 JAGUAR XJ6
  • 6 CYL
  • 2WD
  • 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.

Do you
have the same problem?
Monday, February 28th, 2011 AT 2:38 AM

1 Reply


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.

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Saturday, August 6th, 2011 AT 1:42 AM

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