Question about Jaguar XJ6
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Posted on Jan 02, 2017
first and foremost check the fuse box. there is a fuse for guages. The temp sensor is somewhere on the manifold and it will have a hard wire with probably a spring around it for protections that runs from the engine to the instrument cluster. You can remove the temp sensor and use a heat gun or propain heat and see if you get any kind of response. I suspect if all your other gauges are working the fuse is good. Most temp sensors do not use power only for lighting of the gauge, It just sends a resistance change to the water temp bulb and it moves the gauge. Is it a seperate gauge or in your insturment cluster? could be simple as a crushed line or the sensor went bad. It is normally self contained. I suspect it is a gauge and not a dummy light? if you can not get the one working in the instrument cluster I suggest going to and autoparts store and replace it which is very easy to do. You can remove the old sensor from the block and reinstall the new on in its place and run the cable back through where the first one was and mount the gauge in another area, It is very important to know the water temp since most computers use this info for setting the correct fuel to air mixture in a closed loop system. That is a diffrent sensor but you need to know the temp yourself to keep from blowing a head gasket or worse which can cause you lots of money to repair, I prefer to mount my own gauge seperate from the cluster, best of luck
Posted on Jan 02, 2009
Hi the idler valve has a set up with jag equpment but there is a way round this,ifyou have had O2 sensors changed, is the idler working what are the revs when hot. 650 is to low 850 is ok with a hot engine Mike do you know where the idle valve is and the allen key manual adjustment try a quarter turn but mark it so you can turn it back if need be. let me know how it goes D
Posted on Jan 11, 2009
SOURCE: my jag wont start
It could be an ignition related issue or fuel.
When it doesn't start does it crank, do you have the ignition lights?
The most common problem of intermittant no star probems is the crank sensor on the front of the engine, they can break down over a period of time and fail when warm. if not then I would fit a fuel pressure guage to the car and run it. Then see what the reading is when warm. If it is nothing (should be 38-40) then I would replace the fuel pump relay.
The fuel pumps typically don't fail intermittantly, they just fail!
Posted on Feb 17, 2009
If the brake lines and fluid is clear then you may have to look at the brake booster found at the other end of the brake pedal under the hood...
Posted on Jul 23, 2009
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