XJ6 & XJ12 Series I, II & III 1968-1992

Starting problem, Jaguar XJ6 1979

Old 05-10-2014, 05:45 AM
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Default Starting problem, Jaguar XJ6 1979

Hello Everyone
I have a 1979 Jaguar XJ6 Series 3
My problem is this.
As I move the engine in a cold state, it drives easily.
After driving, the engine is warm, I turn off it for 30 minutes or so, he did not start.
I have to wait about an hour until it start again.
Starter spins strong.
I checked the ignition system, everything right.
I thought there was a leak in the injectors, changed them, did not help. I replaced the temperature sensor.
Another thing, when the engine is hot, it does not work round and fakes.
I'd love to learn from the experience of others
Old 05-10-2014, 10:06 AM
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Originally Posted by gdiilk View Post
I checked the ignition system, everything right.

Are you sure? How did you check for this?

Here's why I ask:

The ignition module and the coil are both known to give starting and/or running problems *when hot* and then return to normal operation after cooling down. Both are easy to replace.

(In mentioning the ignition module I'm assuming your Ser III has the typical Lucas CEI system -- Constant Energy Ignition. But, since your's is an early Ser III you *might* have the older Lucas OPUS system....a different kettle of fish entirely. The Lucas CEI is easily identified: if there's a black box bolted to the front of the inlet manifold you have the CEI system).

There are other possibilities, of course, but your description sounds typical of a module or coil problem.

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