joeb Posted August 24, 2009 Report Share Posted August 24, 2009 chasing minor erratic engine miss. i put in autolite single tip platinum plugs 10k miles ago when i did the headgaskets. had a slight miss ever since. i changed them out this weekend to delco 41-950 plugs and noticed 3 of the plugs on the rear bank had carbon tracking. idle seems much improved now. wires are delco but 5yrs old? i have read that problem may return soon without also changing wires. i will monitor situation. Link to comment Share on other sites More sharing options...
Ranger Posted August 24, 2009 Report Share Posted August 24, 2009 Yeah, unfortunately the plug wire caps are probably carbon tracked as well and it may soon return. Link to comment Share on other sites More sharing options...
BodybyFisher Posted August 24, 2009 Report Share Posted August 24, 2009 The AC Delco ignition wire boots are impregnated with dielectric grease, if you use additional grease you can cause carbon tracking, do you recall if you used dielectric grease? Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
joeb Posted August 24, 2009 Author Report Share Posted August 24, 2009 no i have never added/used any type of grease. seems to me i noticed the miss almost immediately after doing the heads. perhaps it was not bad at first and than slowly got worse. Link to comment Share on other sites More sharing options...
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