Cylinder 1 misfire check engine light rough idle

[curtnc]

hello my 2014 Yukon SLT with 97k miles. Auto zone shows code of P0301 cylinder 1 misfire detected. Watch YouTube the ignition coil pack looks easy to replace myself. Any advise Thank you Curtnc

 

[Doubeleive]

what looks easy to replace?

 

[curtnc]

what looks easy to replace?

sorry the coil pack on cylinder #1

 

[Doubeleive]

sorry the coil pack on cylinder #1

well before you go out and spend money on one swap it with one from the other side and see if the problem follows the coil pack or not, could be a bad wire also.

 

[wjburken]

Might not hurt to pull the plug and check it. You’re close to 100K and if you haven’t changed your plugs lately, they might be getting used up.

 

[BG1988]

hello my 2014 Yukon SLT with 97k miles. Auto zone shows code of P0301 cylinder 1 misfire detected. Watch YouTube the ignition coil pack looks easy to replace myself. Any advise Thank you Curtnc

the first Step is to STOP driving it you will burn up the cat
it only takes a mile or two and you just burning up a good part

 

[Kraig]

There are almost an infinite amount of things that can cause a misfire on one cylinder—unless you just have money to burn, don’t use autozone’s suggestions for what you should buy. As someone suggested, swap it with another coil and see if the problem stays or follows.

 

[curtnc]

After. Complete replacement of all plugs and wires. Seems to be just fine.

 

[wjburken]

Glad to hear you got your Yukon back up and running and it was a simple fix.

2014 Yukon SLT with 97k miles.

I question all the claims by OEM’s and others that plugs can last 100K or more.

 

[donjetman]

Did I ever show you my sparkies? and it was NOT mis-firing. I'm not sure how many miles were on them when I took these pics. I had recently(Oct.2018) purchased our Yukon off a used car w/132k miles and a unknown mx history. It was burning and consuming oil like crazy then. I replaced the pass side valve cover, rear main seal, and performed TSB 10-06-01-008M https://f01.justanswer.com/ebrock63...il+Consumption,+MIL+ON,+Engine+Runs+Rough.pdf. I cleaned the sparkiies up in my media blast cabinet, checked/set the gaps at .040", and screwed them back in. Now, 15k miles later, it doesn't leak or consume any oil. YEAH!! and still NO mis-fires.
View media item 27442View media item 27443View media item 27441View media item 27444