I have a 2010 Jeep Grand Cherokee automatic with almost 180,000 on it. It has an error code of P0304 engine misfire. I have used different injector cleaners with no success. Both spark plugs and the coil have been replaced. My suspect is that it might be fuel injector as next thing replaced, but when it is turned on, it has rough idleand even when i shift into drift you can feel it is rough riding. It burns through gas as two months ago it was getting over 350 mpg, but now barely makes it 220 mpg. Any thoughts or suggestions would be great as well as average cost of what the problem could be?
Which engine does this one have?
I stopped. I swapping fuel injectors in the mess moves. You know it's a bad fuel. Injector. If not that it could be computer, it could be wiring. It could even be a blowing head gasket that you'd have to test for
