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My gut tells me that I have deteriorated catalytic converters, but I guess that’s hard to confirm without taking them off, correct? My check engine light is on for what I assumed was my EGR valve being unplugged, but I’ll get it scanned to make sure the cat efficiency below threshold code hasn’t returned. I don’t really mind spending money on new cats, but it would be nice to confirm that they need replacing somehow before I do.
So is there a consensus here on where the ground wire or electrode of the spark plug should be indexed on one of these cars? 12 o’clock? (in other words, that the open, unshrouded spark should face the front of the vehicle?)
I’ll report back after I install the new coils and mess with the spark plug shims.
Thanks for the kind words and encouragement.
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