Your 2002 jeep liberty has a skip to it the plugs where changed at 30000 miles it now has 48000 miles no engine light on any ideas?

Answer 1

I would try adding some fuel injection cleaner with your next tank of gas. This has helped me with minor engine misses and/or hard starting conditions. HAVE THE COMBUSTION CHAMBER AND THE FUEL INJECTORS CLEANED. It sounds like this did not start with the last plug change. I have found in the past that the "Coils on Plugs" seem to start loosing the spark about 50,000 to 65,000 miles on my Fords. It happens cause they run so hot. At least here in the Texas heat....Anyway, it sounds like you have one weak plug or one weak coil. There is a way to check these coils to find the bad ones and I'm sure someone one the web will tell you. But, I'm lazy, if I'm going in there for one coil, I will do them all and the plugs at the same time. My luck would be to have another one go bad after a week or so, so, change them all. It is always worth the investment.