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Hey fellas, so I have been all go no quit doing some upgrades to my GT500. Wasting no time. I don't believe in leaving plugs in for more than 30k miles, so I went and picked up some Motorcraft SP405's, which is what it calls for stock. I felt a little misfire and some sputtering here and there. Anyways, took the plugs out and this is how they came out:
Car is bone stock. No CAI or tune yet. Car is running much better now and throttle response has become more crisp. Those are pretty shot for a car with 29k miles on it... What do you all think?
Car is bone stock. No CAI or tune yet. Car is running much better now and throttle response has become more crisp. Those are pretty shot for a car with 29k miles on it... What do you all think?