Question about 2003 Jaguar X-Type

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Check Engine Light came on and says Cruise Ctonrol Not Available, Jaguar Dealer says it may be a Vacuume Leak, any idea??

My car was driving fine and while I was driving my check engine light came on, at that same time in the information center it said Cruise Control Not Available.Also when I was accelerating it seemed to miss or not want to pick up I would feel my car studder. What could be a possible issue, the Jaguar Dealer said it could be a vacuume leak? I'm trying to avoid taking it there if possible. Thanks, James Hartman Noxparadise@sbcglobal.net

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  • gerry bissi May 11, 2010

    go to autozone and have them run free computer scan for the fault code

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  • Jaguar Master
  • 2,359 Answers

Do you have access to a good OBD-II reader with live data readout?

The key is to get to the short term fuel trim information.


You has a vacuum leak on the engine.


In order to troubleshoot this, you must start with a clean engine wipe down.


The major offender parts are


air intake gasket on the manifold

air tube after the mass air flow sensor

rubber seal under idle air control IAC motor

===

Warm up the engine for 15-20 minutes (LEAVE THE engine at idle) then spray a little Barmen carburetor clear on the potential air leak location (ONE AT A TIME) and listen for a surge in rpm.

If the engine speed go higher that's mean the carburetor cleaner (ADDITIONAL FUEL) got into your engine and that's the gasket you need to change.

There may be multiple leaky spots so take your time and check all rubber gaskets,sensor and hose that are lead into the intake manifold.

When you finish fill up with one tank of Chervon to clean out the injectors.


Try to get a toque wrench and tighten ever bolt on the valve cover back to specification. If you can not get hold of one then just give each bolt a gentle 1/6 turn.



Please post more information after your inspection.

Posted on Aug 31, 2009

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