Could it be the alternator?
I’m hoping it’s the alternator otherwise it may be the voltage regulator which is part of the ecm/pcm doohickey.
https://wranglertjforum.com/threads...hile-driving-check-gauges.78127/#post-1534619
How far up and down does it climb and dip? From the pics looks like at least it's not going into the red zone.
Swapped out the crumbling original heat shield for a NOS Mopar one. Also put the TSB recommended injector insulation on the #6 injector. The insulation solved my intermittent cylinder 3 miss fire, so I thought I'd try it on my intermittent cylinder 6 miss fire.
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Does the engine rpm change?
The reviews show several that were broke at the small section between the left and middle piece. Mine was fine, it could see how it would break easily.Where'd You get your heatshield ? I ordered one as well but it came to me in pieces....In my head i said "wow this really is New old stock dude......dayum"
With that being said i just went with a DEI one instead! Also are your injectors in OK condition? I had that issue on my Lj due to the stock injectors being cracked...not even they were split,they didn't leak somehow but it was causing havoc for me for a few days ! Ordered some renewed 4 hole units from amazon and they have treated me right ever since after about 8k+ miles !
^^^ This.Double check all grounds.
I used the full Design Engineering kit and resolved the intermittent heat soak issue.Where'd You get your heatshield ? I ordered one as well but it came to me in pieces....In my head i said "wow this really is New old stock dude......dayum"
With that being said i just went with a DEI one instead!
The reviews show several that were broke at the small section between the left and middle piece. Mine was fine, it could see how it would break easily.
https://www.amazon.com/dp/B011VMXEHQ?tag=wranglerorg-20
Injectors look fine. Other than the Jeep getting the intermittent miss fire after it sits for 10ish minutes after shutting it off, it runs great. It only started doing that after the outside temps started getting hotter and I was running the AC keeping the engine at the 210-220 temps. I can see where with the heat shield being crappy allowing the fuel to vaporize in the injector. It would stumble for a few minutes after starting until the injector got good fuel pressure.
I thought about the DEI kit, but didn't since I wasn't planning on pulling the fuel rail. When I replace the injectors, I will probably get it.
Great news.... FINALLY GOT MY REFUND FROM AMAZON !!!!
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Now I can roll the dice again with something else for the Jeep![]()