Question about 1992 Jaguar XJ6

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1992 jaguar sovereign problem. the car was running fine, then last night I changed the oil and the car will start but will not idle. I can keep car running if I feather the gas pedal. The car car does run rough and backfires and sputters when I do this any suggestions. Thannk you

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  • 183 Answers

Dry gas /probably have water in the gas and it accumulated when you jacked it to change oil

Posted on Jan 18, 2013

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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SOURCE: Jaguar 1995 XJ6 idle doesn't hold

I had this problem with my wifes car. I went through the car top to toe and found more than one problem causing this intermittant issue.
I found a weak crank sensor, when warm it was intermittantly losing a signal, replaced it and the problem was a little better, I then found that the throttle position sensor was also intermittantly not within the range it should be, replaced it and it helped, I then was getting the oxygen sensor code and that was only due to the car stalling, nothing to do with the o2's, I finally traced the final issue to the integral harness on the valve body inside the transmission, I replaced that harness and fitted a new transmission speed sensor and the car has been perfect.
I know you have several issues here that could be your problem but you now have a base to start from.
Last thing is the car may just need an engine set-up if you are no longer having any codes. This is only done by the dealer using there WDS computer system. The perform a oxygen sensor orientation test, they set-up the kick down and also set-up the Throttle positon sensor (TPS).
Hope this helps.
JPTCAT

Posted on Feb 17, 2009

  • 80 Answers

SOURCE: Rough Idling, start-up early morning, until engine heats-up

this may be a sticking air flue meter take a matchstick .and push it into the hose this will let more air in if this works change the air flue meter

Posted on May 04, 2009

txkjun
  • 409 Answers

SOURCE: i have a 1993 jaguar sov, 4.0 strait 6 cylinder,

Before you tear into the engine remove the oil pressure sender and install a hand held mechanical gauge and check the pressure. The sending unit coud be bad. As far as the rough running.. when was your last tune up?? The gauge could also drop to zero due to insufficient RPM's because of the rough running. Does it have any knocks when the pressure is at zero??

Posted on May 13, 2009

kevinj650
  • 82 Answers

SOURCE: car won't start after oil change jaguar S type

Sounds like overfill oil pressure too high. Oil level is critical. Engine can be damaged.
See my Solution for oil change.

Posted on Jul 10, 2009

johnjohn2
  • 5763 Answers

SOURCE: My 01 Jaguar XJR started having a rough idle.

you may need a tune-up what you do is at night start the car with hood open and look at all the wires and see if they are sparking if so then tune the car up.start here frist,good luck hope this helps.

Posted on Oct 01, 2009

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It's time for a Italian tune up!

The blue smoke can be one of two thing.

oil drop from the valve stem (from engine head to cyclinders)
or
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===
I will take a 5-10 minutes high rpm (not redline) ran on the highway.
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Please post the actual odometer on the engine and I will follow up on it.

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