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

Sounds like a vacuum leak as the brake booster and the cruise use the engine vacuum and will cause the sputtering also.

What is the fault code? If you don't know you need to have it tested with a scanner that reads all JAG codes, that means the dealer.

check fuses check battery and alternator to make sure check connections to battery reset the stuff see if it comes back may just be from battery being off your radio also dosent work or does it

It sounds as if the fuse which controls cruise control has burned out. Either open the fuse box, or take it to a dealership to get it fixed. I'd go to the dealer, since a Jag is an expensive piece of machinery and they probably cover it for free.

Good luck,
-a.

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

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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.

PCV hose. I had the same problem...Hear air escaping from mine..I just put some hose tape over mine, and when I got the cruise not available and check engine again, sure enough..tape was coming off...replace the hose..problem solved.

Felicia

My 2002 x-type did the exact same thing on many occasions and had many repeated trips to the dealership. This problem was ultimately cased by cracked hoses in the car's vacuum system (which is used in the cruise control and brakes). Have the dealer check the vacuum lines and the breather hose (mine had completely collapsed). Chances are they are leaking and causing your car to "buck" and the cruise to not work. Don't ignore this as it will affect the functionality of your brakes too over the longer term.

If you hav'nt replaced the cumputer yet; try replacing the egr valve first; sounds strange,but has worked for me.

replace the 2 large rubber o-rings in the intake manifold - passenger side - behind the 2 large plastic valves with electrical connectors. probably 3 or 4" in diameter.

When I went outside to start my Jaguar X-Type it was cold outside. I was in a hurry and didn't let the car warm up properly. It jumped a bit then the check engine light came on along with a message that said No cruise control. The no cruise light came off but my check engine light is still on. Any suggestions as to what it may be?