misfire #4 cylinder

JAGUAR XJ8
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CBGBGLAVAN
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I have 99 vanden plas.
misfire #4 cylinder.
was getting 4 misfire codes I changed ignition coils, plugs
after computer I still get the 1 misfire.
have cleaned fuel injector directly and also with fuel additive.
The car has 53000 miles. Any ideas?
By the way, even when throwing 4 misfire codes only the #4 was specified.
Thanks,
cbgb
Jun 19, 2007 at 2:54 PM
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LEE3393
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I also have this problem it is cylinder 3 misfiring The car is throwing codes P0303 misfire detected cyl #3 and P1313 "Manufacturer Contrl. Ignition system or misfire" and P1316 "Manufacturer Contrl. Ignition system or misfire" Please help thanks in advance. I think it is the ignition module or EGR system.
Jun 28, 2007 at 1:43 PM
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FSTRANGER302
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[quote:860168ed61="lee3393"]I also have this problem it is cylinder 3 misfiring The car is throwing codes P0303 misfire detected cyl #3 and P1313 "Manufacturer Contrl. Ignition system or misfire" and P1316 "Manufacturer Contrl. Ignition system or misfire" Please help thanks in advance. I think it is the ignition module or EGR system.[/quote:860168ed61] do you have any other miss fire codes other than specified above, also are there any other codes in the computer at all. if so i need to know them all .
Nov 16, 2007 at 7:03 PM
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CBGBGLAVAN
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I had changed what I thought was #4 coil, which is the one specified by diagnostics.
Not being familiar with British engines, I changed wrong coil.
After months of head scratching, fooling with fuel injectors, computer, air flow, etc. I realized I had changed wrong coil.
Put new coil in #4 and now runs Beautifully.
At one point was throwing 7 or 8 codes, all attributed to this one coil misfire.
Nov 17, 2007 at 8:15 AM