Misfire engine

[Asset]

I have Thoe 2018. Today in the morning, check engine start blinking and ABS is off. I can feel the car is vibrating pretty bad, even when car is not driving.
Went to dealer and they check codes. Find out that engine is misfire and something wrong with cylinder #6
When i was driving the car was shacked as well.
How serious it is? they say that it takes 3-5 days for diagnostic, but i just want to be prepared.

 

[Joseph Garcia]

It should not take 3-5 days for diagnosis, and the cause can be from many sources. The use of a quality bi-directional scanner should be able to locate the source of your issue in a matter of hours.

 

[Doubeleive]

I have Thoe 2018. Today in the morning, check engine start blinking and ABS is off. I can feel the car is vibrating pretty bad, even when car is not driving.
Went to dealer and they check codes. Find out that engine is misfire and something wrong with cylinder #6
When i was driving the car was shacked as well.
How serious it is? they say that it takes 3-5 days for diagnostic, but i just want to be prepared.

could be anything from simply needing a induction service, spark plug, coil, injector, to internal engine damage.
without checking it out thoroughly it's just a guess

 

[Asset]

Hopefully it is simple. He said the same thing. Can be serious or not , diagnostics will help. But why car is shaking?

 

[Asset]

It should not take 3-5 days for diagnosis, and the cause can be from many sources. The use of a quality bi-directional scanner should be able to locate the source of your issue in a matter of hours.

they said, they behind for repair

 

[Asset]

To be mor specific, it is Cylinder 6 Misfire Detected

 

[Doubeleive]

Hopefully it is simple. He said the same thing. Can be serious or not , diagnostics will help. But why car is shaking?

the engine runs smooth with all 8 cylinders firing, when 1 is missing, it's like a table or chair with 1 leg shorter than the rest so it wobbles
same thing applies for many moving things like fans, unbalanced wheels, drivelines, all kinds of things basically anything that spins has to be balanced.

 

[Asset]

Got update from dealer, i don't know details, but basically, they are saying that need new engine. They said something with drive shaft in cylinder #6
NEW ENGINE with 80K miles. Are you kidding me??

 

[Doubeleive]

Got update from dealer, i don't know details, but basically, they are saying that need new engine. They said something with drive shaft in cylinder #6
NEW ENGINE with 80K miles. Are you kidding me??

it might be worthwhile to get a 2nd opinion from a different shop, dealers tend to not want to make repairs and instead want to just replace it.

 

[Asset]

How about cost assistance from GM? anyone heard about it

 

[Fless]

If they gave you a written explanation of the diagnosis it would be great if you could post it for us to see.

 

[ReaperHWK]

I can’t see how one misfire code means a new engine. Take that truck to another mechanic!

95% of the time it’s a plug and/or coil. Then if that’s not it the injector.

 

[Fless]

I can’t see how one misfire code means a new engine. Take that truck to another mechanic!

95% of the time it’s a plug and/or coil. Then if that’s not it the injector.

Or a valve spring, bent pushrod.

 

[ReaperHWK]

Or a valve spring, bent pushrod.

Yep, but that would be much of a “low probability” cause of a misfire but even that can be fixed without a new motor. Seems like a lot of these dealers don’t want to open the engine and repair it and just take the big money job and replace the motor.


I’d also check to see if an independent mechanic would take a second look instead of a dealer.

 

[PPV_2018]

Wow, get a second opinion. Don’t tell the new mechanic what the dealer said.

 

[Doubeleive]

How about cost assistance from GM? anyone heard about it

not unless you happened to have some kind of warranty that maybe just ended like very recently, sometimes,,,,,,,,if you were extremely lucky
but being it is a 18 and 80k, pretty sure that's a hard no

 

[Asset]

80k Millage and new engine, you gotten be kidding me.
I will get tomorrow details explanation what the problem and will speak with the manager.
Can i drive that car? i need to drive line 15 miles to another dealer. Or i have right next to my House, Dillon automative repair, i don't know if you heard about it

 

[Asset]

not unless you happened to have some kind of warranty that maybe just ended like very recently, sometimes,,,,,,,,if you were extremely lucky
but being it is a 18 and 80k, pretty sure that's a hard no

It is called policy evaluation and i spoke with GM customer service and I'm eligible for it since i only have 80k miles.

 

[Asset]

I told them that if after 80k i need new engine, it is mean that GM has really really bad engines.
That tells me probably that cylinder was bad from the beginning and it took 7 years before it shows up.

 

[Taco]

I personally think you should skip the new diagnosis and have a different shop put a plug and possible coil and see if that fixes the issue if not possible injector. I just think with paying for diagnosis again might as well try and fix the issue in my opinion. Good luck.