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Jaguar XJ-Series Forum : “what causes the v-12 to cut out during acceleration ?”

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xjsrouge
09/24/2007, 4:10PM
About: 1990 Jaguar XJ-Series
what causes the v-12 to cut out during acceleration ?

my car has 60000 miles on it. It will run ok if I drive it like there is an egg under the throttle but cuts out and runs rough when under acceleration.

joecorvair
09/24/2007, 4:56PM

Ever change the fuel filter? How's the air filter?

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crazzy450r
09/24/2007, 5:09PM

tps!!!!!!!! throttle position sencer!!!!!!!!!!!!!! possibly bad map sencer too if so equiped , map manafold absolute pressure sencer sorry never was good at spelling

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18TandSVT
09/24/2007, 9:16PM

It could be one of those SENSORS.  Or it might be a bad fuel pump.  I'm sort of having that problem on my SVT.

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xjsrouge
09/25/2007, 6:16PM

I have changed the fuel filter and the air filters are ok but will need to be replaced in the future.

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David8422
08/07/2008, 3:34AM

I got a crankshaft sensor and coil for my XJ Sovereign when it kept cutting out, seems fine now. Good luck.

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Jeff3534
02/11/2009, 9:44AM

could be several things...bad gas, sensor, idle control, throttle body....
Get a high grade cleaner like Seafoam and run it for 100 miles..
Sometimes the throttle position and/or idel control gets stuck.
you may have to take the breather off and clean and lube the throttle/idle units

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