TexEx
Well-Known Member
Recently changed the cop & spark plug on the #8 because the coil was reading as bad, so I always make an effort to go ahead & change out plug since I'm there(high mileage)..as I was backing out the plug it was screaching & difficult to get out at first but eventually came out. I NOTICED a bit of slight damage to the old plug's threads but put new one in & immediately thought it wasn't seated all the way in. I torqued it to specs (25-30lbs) & put it back together. Sounded great in idle but with foot on brake & in drive noticed a rough, jumping action & also drives rough around 1800rpms. Could this mean the plug is not down completely? Btw the engine light went off after a few miles of driving as well. Ive heard of cleaning or reshaping threads with 14mm thread chaser tool will fix?? Anyone ever deal with this?