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Thuto
Thuto Posted on Dec 21, 2012
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I have a 1988, 911 and the engine miss fires sometimes and I never know when its going to miss fire and why it miss fires? what could be the cause of the problem? when I change the spark plug no 2 and 6 there are traces of oil but after replacing the spark plugs it runs smoothly

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Anonymous

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  • Posted on Dec 26, 2012
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Sounds like you're blowing a bit of oil through the cylinders. Pressure testing each cylinder will tell you if you have an issue.

3 Related Answers

Anonymous

  • 4 Answers
  • Posted on Mar 06, 2009

SOURCE: My Porsche won't start. I've changed all 12 spark

Pull one plug out of one cylinder, and place the top of the spark plug on the body of the car(grounded). Start(or have someone turn the car over) and hold the plug to a grounded spot. If the plug sparks it is not an electrical problem. Also, if the plugs are coming out wet, your flooding the engine making start even harder. Also make sure the plugs are gapped to manufacturer's spec.

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Ricky Peters

  • 2620 Answers
  • Posted on Apr 12, 2011

SOURCE: blue almost white smoke not

white smoke is a sign of water getting in the cylinder maybe blown head gasket.

smhb1

AbdulSamad AL Balushi

  • 146 Answers
  • Posted on Jun 18, 2011

SOURCE: i have porsche cayenne s

first of all let car get cold
open hood chek spark pluge cable weather they are fitted well or not if every thing fine also make sure the tight spark plug well..



if above fine might some oxygen sensor problem u can chk with dealer computer

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96 E250 300 ci Was running perfect then started missing Replaced vacuumed hoses, found 1 loose spark plug, and 3 that were finger tight. Replaced all 6 plugs.
If your 96 E250 300ci was running perfectly and then started missing and the code is indicating a miss fire in cylinders 1 and 2, there could be a few potential causes. Here are a few steps you can try to troubleshoot and resolve the issue:
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  3. Check the compression: A compression test can help to determine if the engine is getting enough compression to run properly. Low compression in cylinders 1 and 2 can cause the engine to miss fire.
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You may get one bad spark plug in 50 years of driving

Does that answer your question?

You did not diagnose your problem, which
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Do you have codes PO301 thru PO306?

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