MISFIRE #4 CYLINDER

  • Tiny
  • cbgbglavan
  • Jaguar XJ8

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

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Tuesday, June 19th, 2007 AT 2:54 PM

3 Replies

  • Tiny
  • lee3393
  • Member

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.

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Thursday, June 28th, 2007 AT 1:43 PM
  • Tiny
  • fstranger302
  • Member

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.

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Friday, November 16th, 2007 AT 7:03 PM
  • Tiny
  • cbgbglavan
  • Member

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.

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Saturday, November 17th, 2007 AT 8:15 AM

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