Persistent Misfire cylinder 3

[wjburken]

So do I Brother. There will always be a little something to do though. Thing is the more I do myself the more I learn. Parts are a lot cheaper than labor.


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Very true!

I fully stand by the phrase in my signature about experience and how you gain it.

 

[HiHoeSilver]

Anyone use this service?

http://alldatadiy.com/?gclid=CjwKCA...Fho9BoDiZtUyX0S1bAogfOUgoJLpaaLBoCaUwQAvD_BwE

Also what’s everyone think of Delphi parts ?


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Many use alldatadiy. Great source for your specs and procedures. @swathdiver can speak more to it, I'm sure.

Delphi is good for most things. They make alot of OEM electronics. I would say it depends on the part, really.

 

[swathdiver]

Been using AllDataDIY for a long time, probably over a decade. Use it more to help y'all out then myself these days!

 

[Nap73]

Many use alldatadiy. Great source for your specs and procedures. @swathdiver can speak more to it, I'm sure.

Delphi is good for most things. They make alot of OEM electronics. I would say it depends on the part, really.

Yea it looked real good online I’m going to go ahead and get the AllDataDIY. I want to have something other than this message board & YouTube to rely on for repairs.


That’s what I read they make a lot of the OEM electronics. The ignition coils are on Amazon for a great price. I’m just going to by all new. I’ll also get the harness for the other side. Can’t hurt.


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[Nap73]

Well I just got home from the 1st half of My trip today.

All said and done it was a round trip 3 hour 90 mile drive. Only stopping to drop My Wife and Daughter off.

The Truck was subjected to every driving condition possible.

“”Sitting in stop & go traffic for 2 hours heading in.

“”To clear sailing all the way home for over an hour of 70 mph driving.

Not one code shown or stored.

“”Should be noted since the issue started I haven’t been able to make those kinds of long trips without at least a couple of stored codes.

I have to go back to the city in a few hours so that to Me will be the deciding factor. But I think it’s safe to say the misfire was caused by that coil wire harness.

“”Also should be noted that My gas gauge never since I bought the truck showed all the way full. No matter how much gas was in the tank. Now after the Techron & I believe more so the sea foam it shows full.

Thanks Guys for all the help. It is very much appreciated. Anyone needs anything shoot me a PM.




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[wjburken]

Well I just got home from the 1st half of My trip today.

All said and done it was a round trip 3 hour 90 mile drive. Only stopping to drop My Wife and Daughter off.

The Truck was subjected to every driving condition possible.

“”Sitting in stop & go traffic for 2 hours heading in.

“”To clear sailing all the way home for over an hour of 70 mph driving.

Not one code shown or stored.

“”Should be noted since the issue started I haven’t been able to make those kinds of long trips without at least a couple of stored codes.

I have to go back to the city in a few hours so that to Me will be the deciding factor. But I think it’s safe to say the misfire was caused by that coil wire harness.

“”Also should be noted that My gas gauge never since I bought the truck showed all the way full. No matter how much gas was in the tank. Now after the Techron & I believe more so the sea foam it shows full.

Thanks Guys for all the help. It is very much appreciated. Anyone needs anything shoot me a PM.




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Glad to hear your problem seems to be resolved and it was a fairly simple fix.
(*cough* post #2 *cough*)

 

[Nap73]

What is the condition of the harness going to the coil?

Yea I know. You called it.




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[Nap73]

Glad to hear your problem seems to be resolved and it was a fairly simple fix.
(*cough* post #2 *cough*)

My gut feeling to be totally honest was to change it out in the beginning. Only reason I didn’t do it at first was I couldn’t find any info on how to do actually do it. I ended up just taking it apart & figuring it out Myself.


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[wjburken]

Yea I know. You called it.




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In all seriousness, thank you for posting back with how things turned out. It will be useful for the next guy that has a similar problem.

 

[Nap73]

In all seriousness, thank you for posting back with how things turned out. It will be useful for the next guy that has a similar problem.

Of course Man. That’s what this is all about Helping each other. If any part of This helps the next guy out it’s worth it.

I just wish the “search” of these forums yielded better results. Every time I have a situation I find myself having to start a whole new post because the search function works so poorly.




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[Nap73]

Just got home from My 2nd drive to NY today.

All in All I drove 180 miles and was on the road 5 hrs. Not one code or pending code and I checked several times.It’s safe to say the harness was causing My misfire.

The Chariot is running beautifully.

All is good in the world.




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[Sam Harris]

Hell yeah! Glad to hear it.

 

[2017 yukon slt]

What’s up guys

Need some help here

About 2 months ago I had a misfire in cylinder 3 with a flashing check engine light

I replaced the ignition coil and it immediately fixed the issue. I then went ahead and changed all the plugs and wires.

Now the 2 days ago about 45 min into an hour drive and I get another cylinder 3 misfire code P0353 solid check engine light and 2 pending codes P0303 & P0353. The mechanic cleared the codes and I went about my business.

Then yesterday I’m taking another hour plus drive and I get a flashing check engine light that stops about 3 mins after it starts. And I have 2 new pending codes P0303 & P0353. Light goes off and never comes back on. I clear the pending codes

I go to the mechanic today and he moves the coil from cylinder 3 (the one that was changed ) and exchanges it with the cylinder 1 coil. Now driving I get the same pending codes again P0303 & P0353.

What do you guys think ??

Any assistance or comments are appreciated.





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Had the same issue on my 2017 yukon slt now I'm out $1000 to replace fuel injector #6 cleaning was first option that set me back $200 from the dealer, then check engine light back on the next week, dealer advised #6 was not spraying at all. From what I've read there are Yukons and Escapades with same issue. I only have 53000 miles no good vehicle should should out a owner out of pocket with low miles. Never had an issue with my Toyota Sequoia and it had 300k