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I know why my car was idling like crap...

688 Views 9 Replies 5 Participants Last post by  roncallo, 
jaymaynard
Decided to take my own advice and put a set of NGK BP5ES in die Weisse Lady. Discovered two problems with the old plugs. The first was that they were Bosch WR9DC+ resistor plugs, and the wires were still Bosch resistor wires. Not sure how much difference that makes.

Here's the second problem:

Spark plug Auto part Automotive ignition part Automotive engine part Fastener


The numbers are the cylinder they came out of.

#8 isn't supposed to look like that, is it? Not only that, but what you can't see from the picture is that the gap is a lot narrower than on the rest. I didn't try using the gap tool on it, but it looks like it's half the width of the others.

The car runs and idles a lot more smoothly now. The big question is: where'd all that crap on #8 come from?
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isthisdave
.


In order of magnitude


1) Valve guide seal

B) Oil control ring

III)Head gasket oil leak



No way of knowing how long they've been in there, right? You know it's clean now, see how it does.
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isthisdave
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I wouldn't worry about it unless it started missing again.
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isthisdave
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Or you could check it after a few hundred miles. Are they smog checked in your locale?
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