Im in the military and went TAD for two months on orders and had to leave my truck and take a government f-450 that wasnt bad but when i got back i started my truck up and tried to get over the withdraw but when i started to drive it i went about 15 miles and my check engine light turned on so i stopped to check it out i got out of the truck and i was like wtf when i saw it was leaking gas by the gallon and the coolant was leaking out so i drove back and fixed those two problems but i still have a second cylinder miss fire p302 so i changed my plugs wires cap and coil and im still running the missfire any suggestions to what can be the problem maybe a vacuum leak

 

Did you put fresh gas in it? Try a bottle of techron and drive a while and see if it clears up

 

I did i ran all sorts of inject cleaners like lucas and sea foam but sit no good i reset the codes everytime they pull up but it turns right back on

 

sounds like a mouse chewed on your engine, check the wires going to that injector.

 

Then swap the injector with another and see if the misfire migrates. If it does, it's the injector.

 

This may not help you with the problem but it may help you get paid. When i was in Germany and had to travel on orders one time I came back and a mouse had chewed the underhood harness, i was able to claim it to Jag and have the military pay for repairs since I was on orders. Good luck

 

hi would agree with aim4squirrels a rat may have moved in to your truck.
check your heater dicts thay love to build there nests there.

good luck