XJS ( X27 ) 1975 - 1996 3.6 4.0 5.3 6.0

Difficulty starting 94 XJS 4L

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Old 08-13-2017, 08:03 AM
Daniel Hough's Avatar
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Default Difficulty starting 94 XJS 4L

Here is the issue. For the first start of the day, engine cranks fine but won't fire up. I then smell gas fumes. After a few more tries, the speed of the cranking goes up a little, then it will eventually fire up (If really cool or damp out, it is harder to get started). Once it's running, the engine is as smooth and powerful as if it was brand new (95k miles). It usually starts right up the rest of the day.

So far I replaced plugs, checked & cleaned rotor, replaced coolant temperature sensor. I have seen some posts with reference to the fuel pressure regulator but is there a way to check it before spending $80 plus?

Any thoughts?
 
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Old 08-13-2017, 01:17 PM
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Hi Daniel

It could be the Crank Sensor underneath the Flywheel

Known to give problems with Starting.

Anyone else agree?
 
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Old 08-13-2017, 05:30 PM
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Yes, the Crank Sensors for the AJ16 engine have been known to give problems with age.
 
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Old 08-14-2017, 08:18 AM
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Maybe the cold start valve (injector) not working?
 

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