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I'll work on getting the code tonight (PC software installation issues...).
In the meantime I put the old plugs back in. The new ones were right on .028 gap but I thought getting it back to its original state would be a useful diagnostic (plus it's my wife's car and she's tired of the problem).
She says it still does the occasional stumble. Probably no change. It did not do it when I did a test drive around the block but that's the way it has always been - generally runs fine, sometimes acts up for a few seconds. FWIW she says it tends to do it in reverse. I don't know if that is really true or if it is more unnerving to have the car "surge" when backing up (engine stumbles, idle drops, apparently computer detects this and bumps up the engine speed a bit).
One thing I should mention: I put anti-sieze on the plug threads. I wondered why Volvo doesn't do this but now that I have a problem thought I better make sure it is ok to use the stuff. If it is not ok to use it any suggestions for getting it out of the plug holes?
I guess I'll start looking for nicked wires around the coils. I can't think of what else to do (yes, I know, read the code).
Thanks for much for the help.
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