XJ40 ( XJ81 ) 1986 - 1994

NEED HELP

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Old 03-16-2024, 06:25 AM
Jaguar xj40 1990 4.0's Avatar
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Default NEED HELP

I recently bought a 1990 jaguar xj40 4.0 with a problem, it stalls, and has a rough idle from time to time.
the previous owner changed the fuel filter and fuel pump.
I have fixed the MAF sensor which was not working, i also fixed the fuel injectors that were leaking, and changed the spark plugs.
so far nothing has changed, the car works great for a period and then just goes rough and drops in rpm, has a hard time recovering and sometimes just stalls.
there is no check engine light.
what should I do?
 
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