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No ignition

Tiny
OKLA-OKI
  • MEMBER
  • 1994 JAGUAR XJS
  • 4.0L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 75,000 MILES
No ignition to plugs, turns over good, tachometer indicates 1,000 rpm when attempting to start.

Injectors do not light noid light when trying to start, no ignition and the coil on the negative side, the small blue wire which I assume is the tachometer wire, indicates ground with the key on.
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Tuesday, January 8th, 2019 AT 12:01 PM

4 Replies

Tiny
MOTOR MASTER
  • MECHANIC
  • 279 POSTS
Hi my name is Dave.

It sounds like there might be an issue with the security system, a common issue with those cars. One unusual clue with that particular car is if the security system is staying armed then the turn signals and wipers will not work. If you lock and unlock the driver door and the alarm doesn't chirp then it is malfunctioning. The module is in the trunk on the upper left hand side above the wheel well and would need replaced if it is malfunctioning.
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Wednesday, January 9th, 2019 AT 5:19 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,904 POSTS
Hello,

If I could jump in here It sounds like a bad crankshaft angle sensor to me. Does the security light flash when you try to start it? If not here is a guide that will walk you through the steps of changing it with a diagrams below to show the location for your car:

https://www.2carpros.com/articles/crankshaft-angle-sensor-replacement

This guide can help as well:

https://www.2carpros.com/articles/car-cranks-but-wont-start

Check out the diagrams (below). Please let us know what happens.

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Wednesday, January 9th, 2019 AT 6:35 PM
Tiny
OKLA-OKI
  • MEMBER
  • 5 POSTS
Hi, could you tell me how to check to see if computer is good on this car? Thanks, Jesse
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Friday, January 11th, 2019 AT 1:23 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,904 POSTS
The only way to see if the computer is good is to send it to a rebuilder to be tested or plug a used one in. Here is the location below:
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Saturday, January 12th, 2019 AT 11:20 AM

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