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Old 09-10-2020, 06:10 AM   #2
blue62
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Join Date: Aug 2018
Location: Woodland Wa
Posts: 1,291
Quote:
Originally Posted by Tinkerer View Post
Hi,

Apologise in advance if this has already been covered. I did have a good look through the forum first. I have a 1998 986 2.5 manual with 48k on the clock. It flew through MOT and the only issue is that on idle the MIL light comes up. On scanning it points to misfire on bank 1 2 3. A quick scan at the Porsche specialist says it's the variocam but without further testing or taking the engine apart they cannot be sure. They did say I could still drive it and live with the problem. Is that recommended or should I get it sorted? Has any got this problem and live with it? Other than this it actually drives great!
If it was my car!!
I would First look at the coil packs for that bank.
Look for hairline cracks in them.
They can be tested with an Oms meter but I don't know the values.

You could also swap all the coils from one bank to the other to see if the misfire follows.
If the misfire code does follow to the other bank then you know the coil packs are bad.

If you continue to drive it with misfires you will destroy the Catalytic converter.
They are very pricey to replace.
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