Help Airmass wiring diagram
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Follow the link below and you can download the wiring diagram for the 2002 model year and it will have the wire color sequence.
JagRepair.com - Jaguar Repair Information Resource
JagRepair.com - Jaguar Repair Information Resource
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#8
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Sure sounds like a vacuum leak based on your description. The simplest, easiest and cheapest things to check first are:
-Brake booster hose. Not unusual to have those deteriorate
-IMT O-rings.
-PCV hose. If it is the smooth one, chances are it is split underneath. Newer style ribbed ones are much more robust.
There is a ton of information on all three of those issues.
Best thing to do is post the codes you have here as that would lead you in the best direction on where to start. If you have P0171 and/or P0174 start with what I mentioned above.
-Brake booster hose. Not unusual to have those deteriorate
-IMT O-rings.
-PCV hose. If it is the smooth one, chances are it is split underneath. Newer style ribbed ones are much more robust.
There is a ton of information on all three of those issues.
Best thing to do is post the codes you have here as that would lead you in the best direction on where to start. If you have P0171 and/or P0174 start with what I mentioned above.
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Thank you Brother!,I will look into that. by the way, i forgot to mention that i have already new brake booster, new brake vacuum hose, new ICV or PCV, new TPS, replaced all spark plugs, replaced three (under intake manifold)of the ignition coils, resealed the IMT o rings, resealed the intake manifold, resealed the PCV hose and still having this problem. Fortunately i am still looking forward to be a long time partner of this cat!