Question about 1988 Jaguar XJ6

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Car wont start

I was driving down the highway one day when suddenly the car shuts off. I pulled over put it on park and tried to turn on but no luck... it still doesn't turn on... these are the thing that I checked:
1-change the coil for a new one, it has spark
2-disconnected spark plug wire #1 and crank the engine and it has sprk
3-fuel pump activates as I turn the key
4-disconnected line that connects to the fuel pressure regulator and as I turn the key switch fuel comes out from the pressure regulator...
*anyway is there a fuse or relay hidden like behind the radio or in the trunk that I should be looking for to replace or some switch to be reactivated.

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  • 233 Answers

It sounds like this could be a common problem - usually this is caused by the crank sensor going out/bad. The sensor is mounted to the timing cover on the front of the engine.
The crankshaft sensor provides both engine speed and crankshaft position signals to the ECM. The sensor is a variable reluctance device, consisting of a bobbin coil with a magnetic core. The resistance of the coil is approximately 1.35 kilo ohms . The steel teeth on the crankshaft timing ring are used as a rotor. As the rotor teeth pass by the crankshaft sensor, pulses are generated.

The rotor has 60 tooth positions set at intervals with three teeth missing. The gaps identify the TDC position of the 6 cylinders during one complete engine cycle (two crankshaft revolutions). The rotor thus provides both engine speed and crankshaft position information to the ECM. The missing pulses identify crankshaft position. Each tooth pulse after the missing pulse represents of crankshaft rotation. Thus the frequency of the toothed pulses are a measure of engine speed.
car wont start - 2007-09-20_091035_jag.gif

Posted on Jan 15, 2009

  • Josh Crager
    Josh Crager Jan 15, 2009

    this is the crank sensor:

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