Quote Originally Posted by BillionPa
if you have never replaced it, it would be good to do so, since it affects fuel econ as well.


.... check your distributer and ignition coil.
The oxygen sensor was replaced by PO about 20,000 miles ago. Replaced distributor and rotor as well as spark plugs and ICV, that still hurts. Still no go

About the ignition coil, as per Bentleys:
Primary Coil, terminals #1 and #15 should = 500 ohms + or - 10% / reading below 200 ohms.
Secondary Coil, terminals #1 and #4 should = 6000 ohms + or - 10% / reading 9700 ohms.

Would tend to indicate it was bad but I'm wary of throwing more expensive parts at the problem. I have a hard time understanding how if the coil is bad that it only shows itself at idle.
Could someone explain that?

Thanks

Jim