Replaced Old Spark Plugs at 200K miles
Not in bad condition, gap was still .05", but when ICE was hot and accelerating up hill it would run rough sometimes after I used injector cleaner. Seems to be working fine with no noticeable problems. I went from SP531 to SP530 plugs. Update the problem was right half shaft CV joint, no change in MPG's so I didn't need to replace Spark Plugs after all. :drop: Paul
Just changed my plugs with about 71k ICE miles and 33k EV miles. Well Ford you could at least torqued the plugs correctly. Take a look at the 3rd plug from the left. It took virtually no torque to loosen the plug. There was oil on the threads and clearly “baked” on body. The other 3 were tight but I'm not sure they were torqued correctly either (spec. 106 lb in) I've never had a car where the factory plugs were so easy to loosen. Total time was about 45 minutes. Gaps were about 0.053 i
