First Post

Okay here is my problem my jeep started running terrible a little while ago and i have another car so i just parked it for most of the winter waiting for some warmer i have been reading posts and tested all the sensors on the engine couldn't find anything wrong the only codes my jeep is giving off are 300 303 and 304 all miss fire codes.

Might have found the culprit today I was testing compression and it goes as follows:
1-110
2-75
3-0
4-0
5-75
6-110
it seems like it is most likely that the head is warped and i am blowing fuel and air in between the two cylinders but it is also kind of suspicious teh firing order is
1-110
5-75
3-0
6-110
2-75
4-0
It makes me think it could also be a timing issue but then you think all of the cylinders would be low or the same

I was also only getting about 250 km or 150 miles to a tank.
ouch

I am going to put my money on a head gasket and warped head it has been over heated a few times bush running

Let me know what you think

 

Yea, id say head gasket.

and definetly get the head resurfaced. then you should be good.

 

Low or no compression on two adjacent cylinders is usually the head gasket.