2002 KJ 3.7l Missfire on cylinder 1 and 4

stealthynips · **Joined:** Wed Aug 22, 2012 9:38 pm **Posts:** 23

hi today
I keep getting the error codes for a misfire on cylinder 1 and 4. my plugs and coils are good. I'm going to do a compression test soon. i will post result on that.
I have also found a small amount of anti freeze in my oil, located on the bottom of my filler cap when i changed the oil so i got a head gasket leak.

so could it be my head gasket, dirty fuel, or maybe i need a valve job?
suggestions or questions anyone?

lfhoward · **Posted:** Wed Oct 03, 2012 8:57 am

Sorry to hear about the head gasket leak. You'll want to take care of that ASAP or else not drive it a lot because once coolant is in your oil the oil doesn't lubricate properly. It won't be long before the bearings take damage, and then you'll be looking at a much more expensive repair. (Speaking from experience here.)

tommudd · **Posted:** Wed Oct 03, 2012 9:34 am

Is it a yellow like crud under the fill cap? If so that is pretty normal if you only take short trips

lfhoward · **Posted:** Wed Oct 03, 2012 11:33 am

The motor oil can be tested for the presence of coolant. Check out: http://www.blackstone-labs.com

stealthynips · **Joined:** Wed Aug 22, 2012 9:38 pm **Posts:** 23

yes the oil is a yellow white ish looking goop. looks like snot. and theres not much of it, but its there.

stealthynips · **Joined:** Wed Aug 22, 2012 9:38 pm **Posts:** 23

On my drive home from work today my check engine light started flashing. and when i got up to high rpms while speeding up the engine started to sputter.
I know i shouldnt drive it not, but what does that mean?

tommudd · **Posted:** Thu Oct 04, 2012 1:27 am

stealthynips wrote:

yes the oil is a yellow white ish looking goop. looks like snot. and theres not much of it, but its there.

Lots of folks have that during short drives etc
so may not be an issue as far as that goes

But you still have an issue with valves or ..........

stealthynips · **Joined:** Wed Aug 22, 2012 9:38 pm **Posts:** 23

did a compression test. all cylinders checked out normal. check the coils 1 was completely dead and one had a really high resistanced. auto shop only had one coil so i picked it up and replaced the dead one. put everything back to normal cleared engine codes. been running the jeep all day and no issues. crossing fingers.

but i gotta still to the head gaskets.

2002 KJ 3.7l Missfire on cylinder 1 and 4

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