P0300 Multi cylinder misfire!

[Ry' N Jen]

On the way home this evening our KJ generated a P0300 multi cylinder misfire
trouble code.
I searched the FSM but didn't really find what I was looking for.
I bought 6 new spark plugs (NGK G Power)which I'll install Friday morning...
Any other items I should inspect?
Such as the six coil packs?

 

[LibertyTC]

Ryan,
Once those plugs are out see how much larger the gap is over stock. (curious)
Clean the bottom of coil packs and for sure use new die-electric slime..LOL.
Hopefully it is just the plugs not something more evil!

 

[Ry' N Jen]

It will be enjoyable to get my cripple carcass under the hood!

 

[LibertyTC]

Look at the bright side it is actually suppose to be sunny tomorrow.
Check ur email...Mr. Multiple Misfire....

 

[Ry' N Jen]

Look at the bright side it is actually suppose to be sunny tomorrow.
Check ur email...Mr. Multiple Misfire....

Thanks Tim!

 

[JeepJeepster]

Yeah, change the plugs and reset the code. Then if it comes back switch coils and reset again. After that check the compression.. Could be a bad fuel injector also..

 

[Dave]

Socks, maybe it is just some bad gas. (since it was just the multiple misfire code 0300 and you didn't get other specific cylinder codes with it like 0301,0302, etc)

Hopefully that is it. Doesn't hurt to change the plugs. Mine were at least worn to .070 or so after 30,000 miles. Almost double what they should have been. How many miles on those plugs??

Dave

 

[JeepJeepster]

Socks, maybe it is just some bad gas. (since it was just the multiple misfire code 0300 and you didn't get other specific cylinder codes with it like 0301,0302, etc)

Hopefully that is it. Doesn't hurt to change the plugs. Mine were at least worn to .070 or so after 30,000 miles. Almost double what they should have been. How many miles on those plugs??

Dave

Good point. Didnt see the 'multi' cylinder at first. Could just bad gas.

 

[Ry' N Jen]

Bad gas!
The code has not come back... Yet!
I'll swap out the plugs Saturday.

 

[RageOfFury]

Bad gas!
The code has not come back... Yet!
I'll swap out the plugs Saturday.

Bad gas hmm? Where did you fill up? Some station out in the middle of nowhere?

 

[Ry' N Jen]

Bad gas hmm? Where did you fill up? Some station out in the middle of nowhere?

No, a Shell station that always has a line up!
Jen and I did a full day of stop and go city driving today and didn't have any problems!
The KJ started and idled smooth all day... No loss of power, and ran like a champ!

 

[Luke]

OH NO! ..not Shell! .. That's the closest station to me, although I usually hit PetroCan for my 2 cent discount

Good Luck with the plugs dude!

 

[LibertyTC]

Right now I think I'm having a bad gas problem too...
But I don't think it is causing a hick-up...

 

[Ry' N Jen]

The KJ is still running really good!
Couldn't change plugs out today...
I have 3 Teenage girld over this weekend
First thing Sunday I'll tackle it!

 

[ThunderbirdJunkie]

I have 3 Teenage girld over this weekend

You must be registered for see images

 

[JeepJeepster]

Bahahaha

 

[Ry' N Jen]

You must be registered for see images

Ya, nice Eric!


Two age 13 and one 15!
Plus 69% more gray hair as of now!

Boy, and what language!

But that's my fault...
I taught them all the bad words they know!

 

[04jeepliberty]

need help with p0300 code

hi im haveing a problem on my 04 jeep liberty for some reasion my jeep has a hard time to start some times and when it rains even harder to start i scanned the code got p0300 so i changed my spark plugs thinking it was that and drove it for a week then it raind and still haveing a hard time to start in the rain and just a normal day any ideas? i was thing coils but dont no ?

 

[04jeepliberty]

On the way home this evening our KJ generated a P0300 multi cylinder misfire
trouble code.
I searched the FSM but didn't really find what I was looking for.
I bought 6 new spark plugs (NGK G Power)which I'll install Friday morning...
Any other items I should inspect?
Such as the six coil packs?

hi im haveing a problem on my 04 jeep liberty for some reasion my jeep has a hard time to start some times and when it rains even harder to start i scanned the code got p0300 so i changed my spark plugs thinking it was that and drove it for a week then it raind and still haveing a hard time to start in the rain and just a normal day any ideas? i was thing coils but dont no ?