In this video we have a look at a 2006 Jeep Grand Cherokee with the big 4.7 that came in with a customer complaint of an engine light and an obvious misfire at idle. This one was not your run of the mill bad coil pack or injector.
-Enjoy!
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Ok please help so I have a 2008 doing the same thing except it doesn’t specify a cylinder it just says P0300 random misfire. Runs rough after starting up and starts misfiring I’ve replaced top 8 plugs and 8 ignition coils, as well as the map sensor. All this and it still misfires
Do you know why they called 7 up 7 up . Strongs meaning of 7 is destroy. Destroy up !
Which injectors should i use to replace the ones in my 2012 3.6
What are the chances of multiple cam followers on the same bank coming off?I've got a '02 with multiple misfires on the right bank
Did they even check with plug out and see it fires to ground on engine
Im literally going thru this problem right now with my 05 4.7 jeep Cherokee 😪 my mechanics all cant figure it out and its costing me so much?! I used to live in Geneseo NY but now im in TN ðŸ˜
$2500 dollars later 😂
Eric I have a 2004 Buick Lesabre with a miss fire. Took the coil packs off cleaned the ground still has a misfire?
Nice. Good to know! I have an 03 Ram 1500 with the 4.7
On Chevy Sonic LTZ coming to stop sonic wants to jerk what is the problem
Found this channel some time ago and been watching religiously since, both educative and entertaining, have learned a lot and love your back-and-forth with Mrs. O 😀
Decided to finally comment too, to me how you could tell that cylinder 4 exhaust valve was stuck from the compression test and explain the logic behind it is nothing short of black magic, lol!
A real pro is a real pro. Greetings from Finland!
I have the 2.4 it's doing this same thing and funny thing is when engine cold no miss fire engine gets hot bam miss fire comes back then some time the problem will just go a way and come and when it does seems to not want to go back to normal I changed spark plug move coils around the only thing I haven't changed is the injector
Great video, I think I may have a rocker problem with my 2015 Cherokee. 3.2 still mis firing after coil and plug swap.
I have an 06 Jeep Grand Cherokee with a blown head gasket. If somebody wants you to do one. Run away from it. Very painful process.
the lifters can fail, compress and lose their full height and come loose. that lifter might have needed to be replaced
Thank you so much
Excellent 👌ðŸ»
I wish I was as good you are one hell of a mechanic, it's wicked smart and good
Kind of a long shot here, but recently bought an 07' Jeep Commander with the 4.7L gas engine, has 178k miles and I'm possibly having a random misfire but no codes. I can definitely feel the misfire, and hear the misfire in the exhaust tone. So far it seems to be pretty consistent on cylinder 5, but I have seen it on a few different cylinders. I can see the misfire on the mis-fire data, but have no CEL or any other symptoms besides being able to feel it. I'm still working out when it's more prominent, but it appears to be more noticeable towards idle. Idk if it's worth noting, but my Idle Air Control current has a value of anywhere from 4000-5000 mA which seems high but I'm not sure.
My caravan has the same Missfire problem, and no one has found the problem. Could it be the same cause?
The 2010 jeep liberty im trying to fix im praying its the injector po202
"big" 162 cubic inch?
From the scope, how does he know which hump is cylinder 1
dude if they were a mechanic Olympics you would bring home gold every single time…. man I wish your shop was closer
I Have a 2010 Jeep Discovery with a 3.7 , replace injector , plugs, coil,Rocker arms in place, so what do you think burn valves,,,, ????????????
Thank you sir, for such a volume information 😊
Good job…
Great videos Eric.
I get a random misfire cylinder 7 . I tried new plug and coil and still get the random misfire cylinder 7. Any Ideas ? I’m thinking maybe a failing lifter on 7
What about the hydraulic lifter not pumping up completely causing sloppy cam follower ?
I am so grateful that I came across This Video. Buddy! you are blessing.. Thank you so much for your knowledge and especially for sharing it all with us. God Bless you..
I mean the 4.7 is really known to do that it's pretty easy to tell for me at least by the exhaust tone. Not much diag needed
God I love this fing channel. Fascinating diagnosis. So impressive. Experience is everything
Very nice!! Time for an ice cream!!
But there's a reason it came out…..weak lifter usually. Im shocked u didnt address the cause. It should have gotten new melling lash adjusers cuz it's just gonna spit it out again and they may not be so lucky next time.
Not just a great example of deductive reasoning, while understanding the proper diagnostic tools for the job, but someone who takes GREAT pride in their work. WELL DONE!