my 1998 xjs 4.0 jaquar will start but will not keep running ?
I have changed the fuel pump and the pump relay and the fuel filter but the car will start
and die it will not keep running.
Check air filter and clean throttle body.
Check the pressure at the rails..
rail preasure is good ,and air filter is clean,thanks
Sounds like you may have some dirty fuel injectors.
Are you sure it's a 1998 XJS? In thought they quit making the XJS in 1996! I have a 1996 XJS and all info I have says it was the last year they were made.
Sounds like the fuel pressure regulator.
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