SOURCE: Jag XJ6 revs are too high
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.
JPTCAT
SOURCE: hydrolic lifters making a taping noise
First thing to do is change oil and filter. Hopefully it has not done this long and has hard faced the shims. Good luck and have a good day.
SOURCE: 02 jeep grand cherokee, could a blown head gasket
If there is a lot of coolant in the oil it will.
SOURCE: jag diesel o5 engine fault
Hi Without seeing exactly what your looking at ,you need to try and find the vacumn pipes going to the control valve and carefully lok to see they are conected and that there are no splits in the pipes,if the pipes and mechanically sound then you probably have a fault valve,try running your finger around the valve to see if the hissing noise changes.
Hope this helps
Darren DCS BristolLtd Master tech
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