Rough start/spitting?

[TheCanadian]

I've noticed now when I get to operating temperature and turn off the engine then turn it back on after a few minutes to where it hasn't cooled down at all it will start super rough.

It will have RPM's and what not but almost seem like it's not fully started and something is stuck it will also start to shake by the feel of it as well.

So far I've replaced the starter fuse and relay as well as the fuel pump fuse as well just to be on the safe side. Was good for about two startups then back to doing the rough start. No, check engine light displays during this either.

Any ideas?

 

[tommudd]

What spark plugs?
Had one come in that had similar issues, removed the junk platinum plugs installed NGK coppers and ran like new
Owner couldn't believe plugs could make that much difference

 

[TheCanadian]

This issue happened last year during the winter It would happen once, turn it off then back on good as gold. Now it's doing it multiple times and I gave to wait and let it cool down a bit then start it up and all good.

I have bosch iridium plug currently in it.

 

[TheCanadian]

Checked CanadiaChecked Canadian tire and it seems like they don't have copper plugs that fit.

- Platinum
- Iridium
- Ruthenium
- And whatever the E3 plugs are made of.

 

[LibertyTC]

These are the only correct spark plugs for the KJ. 2002-2007 years.
The 2008 to 2012 KK needs NGK ZFR6F-11 (Gap.043 in)
David could you add the year of your jeep to the signature line please..
Lordco & Napa should stock these.

KJ spark Plugs 2002- 2007 below.

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KK 2008 to 2012 -needs NGK ZFR6F-11 (Gap.043 in)

 

[TheCanadian]

These are the only correct spark plugs for the KJ.
Lordco & Napa should stock these.

Napa does have the V-power plugs. I'll check the plugs tomorrow if I have time. It's strange how when cold it startup just fine but at operating temp is causing issues.

 

[LibertyTC]

Check the KK's owners manual for the spark plug specs for the 2008 kk..ooops.
Ill see if I can find the 08 spec though.
2008 KK needs NGK ZFR6F-11 (Gap.043 in)

 

[TheCanadian]

Checked and it says 4291 ZFR6F-11.

Now when I search Napa I get nothing. Canadain Tire tells me nothing on the plug that comes up besides that it doesn't fit.

 

[LibertyTC]

ya just looked up the 08 owner manual ..
NGK ZFR6F-11 (Gap.043 in)

 

[TheCanadian]

ya just looked up the 08 owner manual ..
NGK ZFR6F-11 (Gap.043 in)

I just have to figure out who sells them now haha. Seems like no one where I live seems to have them and dodge will want an arm for each one probably.

 

[TheCanadian]

Does 20lbs-ft sound correct for the spark plugs? Kinda seems a bit high to me but who knows. Can anyone confirm?

 

[LibertyTC]

20 ft lb is spec'd. I also use a very slight hint of ant seize to threads for ease of removal.

 

[TheCanadian]

20 ft lb is spec'd. I also use a very slight hint of ant seize to threads for ease of removal.

Perfect, I just wanted to make sure. It seemed a bit much to me haha.

 

[TheCanadian]

Replaced the plugs in it. Started up just fine...Misfire in cylinder 5. Checked the wrong cylinder apparently, looked a bit harder. I forgot to plug the damn coil in.

Plugged it in, cleared the codes, and test drove. I went for a good hour drive or so to make sure everything was nice and hot since the issue only was when it was hot. Started back up just fine. I did this a few times with no issue. I went out later that night, and guess what issue came back around.

My only other guess is that maybe it's the crankshaft position sensor or camshaft sensor.