1992 Jaguar XJ6 92 Jag won't start

1992 JAGUAR XJ6
158,000 MILES • 6 CYL • 2WD • AUTOMATIC
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JAULT01
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  • 51 POSTS
I recently had to replace the fuel pump, and the fuel filter. After reparing the fuel delivery issues I tested for spark. I had an orange spark (I've never seen this before,) and noticed that the plugs were rather worn so I replaced the plugs, wires, cap, and rotor. I also took the ignition coil in for testing at an autozone and it checked out.

I had the car on the road for about two weeks and then I started to run into trouble again. One night the car would not fire after it had been sitting for almost 11 hours. I tried several times and finally I reset the inertia switch and it fired right up ( not sure if this is coincidence or not.) A week later the car would not start again... this time it sat for two days. Today I went to see if it would start and it did. I started it and shut it off about 4 times (changing the oil) and when I went to start it up again, nothing . It cranks strong, and when it did run the tach reading held steady.

My friend who works on alot of cars believes that it is the ignition control module. Can anyone help me out with an opinion?
Jul 28, 2008 at 9:04 PM
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JAMES W.
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You need to determine when the no start condition exists, if you have lost spark, fuel or both. Knowing this will help narrow it down and save you testing the same things again and again. Just a thought, it may be ingition relay or amplifier or fuel pump relay for starters. Please advise.
Oct 4, 2008 at 11:20 PM
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JAULT01
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I had bad spark and no fuel before so I remedied all of those issues.. new fuel pump, and filter. New plugs, wires, cap, rotor, and a coil check . I actually found the problem. The wonderful LUCAS wiring harness to the pump motor was basically fried.
Oct 5, 2008 at 11:21 PM
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JAMES W.
  • CAR REPAIR CONTRIBUTOR
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Glad you found the problem. Sometimes you have to look "outside the box" to find it. My first experience with LUCAS was on a 1956 Jaguar roadster I bought out of a junkyard for a $50.00. Wish I still had it. Anyway, The wiring was a rubber covered with a cloth braid and if you touched it, it would just crumble in your hand. Did a LOT of rewiring but it ran.
Oct 6, 2008 at 7:31 AM
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