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Hey its been a few days & the car is still running. oil level is good. can't figure out why it hesitates & has alil ruff idel. changed plug, checked for vacumleaks. is therea fuel filter on a 2002 Toyota corolla? If so where is it??. Could it be the fuel injectors? If i unplug the number 4...

OK I forgot to mention this sometimes it rides fine but everytime I get to 50mph I hear a loud knocking sound coming from the engin. Take my foot off the gas and it stops. Step on the gas and as soon as I hit 50 its aloud knocking noise that vibrates . Meanwhile the check engin lite is on an...

Misfire cylinder 4 bought. A new coil pack. No change. Replaced spark plugs. . No change. Its running ruff & & the code said cylinder 4 misfire. Changed what I just stated above. And its still doing the same thing. Hesitation when I step on the gas and u can feel the misfire. When I unplug...