Question about 1995 Jaguar XJ6
I HAVE A 95 JAG XJ6 3.2 PETROL AUTO.THE ENGINE IS CONSTANTLY RACING,FROM 1200RPM UP TP 2000RPM.I REPLACED THE IDLE CONTROL VALVE AND THERE ARE NO AIR LEAKS OR ANYTHING.THE CRANK SHAFT SENSOR HAS BEEN REPLACED ALSO.THERE ARE 2 SENSORS ON THE THROTTLE CASING.1 ON TOP AND 1 ON THE BOTTOM OF IT.IF I CONNECT THE WIRED CABLE TO THE BOTTOM SENSOR.THE ENGINE WONT START.BUT IF I LEAVE IT DISCONNECTED THE ENGINE WILL START BUT STILL RACING.I HAVE A FEELING THIS BOTTOM SENSOR HAS SOMETHING TO DO WITH THE REVS BUT DONT KNOW WHAT.LIKE I SAID,THE IDLE CONTROL VALVE WAS REPLACED WITH A BRAND NEW ONE SO I KNOW ITS NOT THAT.OILING THE THROTTLE ISNT DOING ANYTHING EITHER.ANY HELP AT ALL WOULD BE MUCH APPRECIATED............
If you have replaced the Throttle postion sensor (TPS) or have replaced the battery, sometimes the car will need an engine set up.
I had the same problem with my xj6 and I did an engine set-up and it has been fine for the last 2 years. Also with the idle doing what it did it had a very harsh shift when driving and changing gears.
The BAD news is the dealer has to perform the engine set-up using the WDS (worldwide diagnostic system) The set-up will set the kick down switch, it will calibrate and set the TPS and also perform an oxygen sensor orientation test.
With the set-up it will allow the TPS sensor to be adjusted to the correct factory specs.
Sorry you can't do this your self.
This is obviously if there is no vac leaks and the throttle butterfly is set to 2 thousands of an inch. (gap on the side when closed throttle) check with a feeler guage.
Posted on Feb 17, 2009
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Posted on Jan 02, 2017
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