Jaguar-XJ6 - 1990 xj6 4.0
walter (71.206.210.57) - Sun Oct 5 09:05:45 2008
back fires thru intake only at half pedal as if ignition breaking down runs smooth at idle and untill half pedal and on .what is this?throttle positioning switch
Reply #1 henry (67.232.48.106) - Wed Nov 5 09:49:51 2008
xj6-86 book said "backfiring could be for fuel starvation or insufficient, incorrect or contaminated fuel, what to do??correct grade of fuel(87 o more)ano addictives, water contamination? drain and flush the fuel tank flush the system and renuev the fuel line filter before filling w/ clean fuel, starvation? check fuel pressure, may leaks or blockage, good luck
Reply #2 matt (212.183.134.210) - Sun Jun 28 18:51:37 2009
i have a problem with a xj sport 4.0 straight six. it has a bad misfire which apears to be on cylinders 2, 3 and 4. the car sruggles to start the runs really rough. is there anything which is common to these 3 cylinders or any common cause of misfire?? thanks matt
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