hey guys, I have an 06 ram with a 4.7 and I keep getting a #7 cylinder misfire. I changed the plugs, coils, injector, swapped themm all around, ohms checked all the wires to the coils and injectors. Still misfiring on #7 but only at interstate speeds. any ideas?

 

Has it ever been overheated at all? If not mechanical failure due to over heating and you have done everything as said above then it is electrical

 

has not been overheated. but I already found the problem I pulled it apart today and found that the coolant vein cracked by the #7 piston. so a junk head pretty much.

 

I was just gonna ask if you checked for coolant in #7 before I read your latest post. The 4.7 is known for it in one thats over-heated, but it's quite rare if the engine hasn't...

 

yeah thats what I thought, ripped it apart and there was a big ol nice crack next the the intake valve. anybody know where I can find a cheap head or pair of heads at?

 

There was a guy, horseapples, or something like that, that had a set of heads laying around he was going to let ME get when I was dealing with my 4.7 with the blown head gaskets and everything....


Could try to find him and see if he still has them? lol. It was a while ago though =\

 

Try calling www.junkyarddog.com

 

They have some on ebay also. I just looked at a few