I had this fixed about a month ago and just yesterday I got the hesitation again then the engine light came on. Searched the code and p0307 shows on the display. why do I get it again?

 

P0307 Cylinder #7 Misfire

 

What type of truck you running?
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How did you fix this code originally?
Al.

 

tune-up on plugs are due every 30kmi. Buy cheap copper plugs that are reccomended for replacement NOT the better one's. I'd start there.

 

Replaced the coil on cylinder 7 again, still has a bit of misfire. What could it be?

 

You check the compression on that cylinder yet?

 

What did the plugs look like? Did you check the gapping on them? Also, I wouldn't rule out the possibility of a clogged fuel injector either.

 

Hi i need help.on a 2004 dodge ram 1500 hemi?can anyone.help please ill.appreciated

 

I would recommend to perform a compression test on the cylinder that you have the misfire problem. Remember remove only one spark plug. Not both or you will show that you have no compression. A lot of people make this mistake. If the engine is running bad and you know which cylinder is misfiring, Remove the valve cover and inspect the valve springs. You could either have a broken valve spring or a valve seat that fell out the head and is holding the valves open.