1997 Jaguar Vanden Plas



December, 21, 2009 AT 3:16 PM

Engine Mechanical problem
1997 Jaguar Vanden Plas Two Wheel Drive Automatic

My wife's '97 Jaguar Vanden Plas has been acting up recently. When the engine is cold - especially in colder weather - the accelerator doesn't respond at all. The throttle linkage seems to be frozen. ( We live in South Florida, so " cold" is a relative term ). Once the car gets up to running temperature, the situation seems to resolve itself; although the throttle does seem to stick sometimes while driving, so it becomes necessary to sort of 'kick' it loose. Not very safe. How do I clean and/or lubricate the linkage ( if that's what's required )? And how difficult would it be for me to replace the throttle assembly, if necessary. ( I'm minorly to moderately mechanical ). Thanks; and Merry Christmas.


2 Answers


Dave H

January, 1, 2010 AT 10:57 AM

Start by checking/replacing the TPS

NOTE: Throttle position sensor must be adjusted and set using Portable Diagnostic Unit (PDU).

Removal & Installation
Disconnect negative battery cable. Disconnect throttle position sensor wiring connector. Remove throttle position sensor mounting screws, starting with screw closest to front of vehicle first. Remove throttle position sensor retaining plate and throttle position sensor.
To install, reverse removal procedure. Make sure mating surfaces are clean. Ensure throttle position sensor is fully seated, and that it engages correctly onto spindle.



January, 4, 2010 AT 8:53 AM

I sprayed the throttle body with a good quality cleaner. There was a lot of black build-up that came out of it. I sprayed it repeatedly, giving the cleaner time to work between treatments, and cleaning up the housing with paper towels as necessary. It seemed to fix the problem, and the car is running fine. Thank you for the information regarding the TPS, but as I don't possess the required diagnostic tool, I'd be relying on a mechanic anyway, if it came to that.

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