Engine Performance problem
1998 Infiniti Q45 V8 Two Wheel Drive Automatic 141000 miles
I get a knock or ping when I drive and the accelerator is stationary, not accelerating or deccelerating, I dont think the engine has had a tune up for some time, and has COS system, I am not getting a " service engine soon" light. Will a colder or hotter spark plug help and or bosch platinum +2 or +4 spark plugs be advisible. I have replaced the air cleaner, put Mobil 1 oil and Mobil 1 filter recently, the engine has plenty of power during acceleration and is responsive. Please advise.
Sunday, October 19th, 2008 AT 11:10 AM