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SES light flashingcralarcon_IROCZ 03-08-2005, 05:18 AM I just changed my spark plugs. I put in some ngk tr55...they came gapped at .058...the same gap the stock delco's had. I was driving around the block for a test run and my ses light starts flashing. Then after a while it started to stay on and only flash when i reach about 2500 rpm. I dunno wtf is going on here. any suggestions? mike 96 ws6 03-12-2005, 12:17 AM A flashing SES light indicates a catalyst damaging condition like a dead miss. If all you did was change plugs, I'd check for a cracked insulator, crossed-up plug wire {wrong firing order}, trash in the electrode picked up off the head upon installation, plug wire not snapped into proper position on the plug, did a terminal pull out of the end of a wire when you pulled them off?.... It would help to find out if a particular cylinder is is dead {cold}. mike 96 ws6 03-12-2005, 12:21 AM I guess since you have an LS1 it's pretty unlikely you have the wires crossed up. :D cralarcon_IROCZ 03-12-2005, 04:46 AM yea well i found the problem. my dumb @$$ didn't snap the wire on my #6 cylinder. oh well....problem solved. thanks for the help guys mike 96 ws6 03-12-2005, 08:18 AM yea well i found the problem. my dumb @$$ didn't snap the wire on my #6 cylinder. oh well....problem solved. thanks for the help guys Cool! :cool: Glad it was somethimg simple. | ||