Last couple weeks i've had what seems like a miss on idle and low rpms. After noticing it 2 weeks ago I done the off/on x3 and showed a p0303. Pulled #3 plug ...looked new[abt 15k on plugs]. After a restart had a terrible miss which threw on ck engine light [pretty sure i damaged original 120K plug wire]. New plug wires got me back to original low rpm miss, but no codes. Cleaned throttle body and IAC... no change. With no codes showing i'm at a loss where to start, any suggestions?

Thanks

note: weather has been extremely humid and wet the past month....just in case there's a unlikely connection

 

I would do a compression test. But I would take a look at the injector wire harness, on the rear cylinder head. They have been a problem for sometime. You may need to open the harness and inspect the wires.

 

I had a feeling that original p0303 was gonna haunt me....might be a while before i have time to get at the backside and ck things out. Since it's only noticeable at and a little above idle I can live with the aggravation till time allows.
Thanks for the suggestions, if they pan out i'll be back with a update.

p

 

What I done:

pulled fuel rail and swapped #3 injector with #4, pulled #3 plug and swapped with #2 [easiest to get at]. Cleared code...still had same miss, but the following day it threw a p0302 instead of a p0303. Bad plug!!! $4.35 for a new champion and it runs like a clock

What I should of done before buying new wires cleaning IAC throttle body and all that other crap:

Swap that #3 plug with another plug even though it looked almost new [no cracks, tracks or carbon buildup]

live and learn.........

 

Glad it was something cheap and easy to fix - thanks for sharing
I've seen my share of bad brand new plugs, it seems that careful handling of parts like that is not the norm at most parts shops and they are often damaged before you even receive them.