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Old 02-28-2009, 03:53 PM   #1
wolffboy
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Default 2001 SL2 DOHC Misfire

Suddenly started misfiring last week, threw P0172 & P0341. Replaced spark plugs & wires - no improvement. SES was solid, started blinking sporadically yesterday. Number 3 splug had oil on it (OUTSIDE the cyl) all plugs were dry on chamber side.

Should I spend $110 for a new coil when it may be a burnt valve or timing chain issue?

Any advice?

TIA

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Old 02-28-2009, 04:09 PM   #2
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2003 L-Series 3.0L Sedan
Default Re: 2001 SL2 DOHC Misfire

Oil on the outside of the plug(s) is just an indication of the cam cover gasket leaking oil into the plug well(s), that's all. Whether it aggravates a misfiring condition is open to interpretation as all you need to do to put aside fears of misfiring from oil shorting the high voltage spark is soaking up the oil with absorbent tissues/towels/turkey baster, etc. to remove any doubt. Either the misfiring will go away immediately or remain. You still need to perform a compression test as suggested in your other posts. Or simply remove the plugs for another quick examination in case one broke while installing them. Some mishandled their plugs and went through a whole slew of posts troubleshooting everything and anything until removing a plug to find one broken!?

...
VCX NANO

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Old 03-01-2009, 04:51 PM   #3
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Default Re: 2001 SL2 DOHC Misfire

Did compression test, and the head gasket is blow between 3 & 4

Wont know valve condition until the heads come off tomorrow.

News at 11

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