Fouled Plugs from Non-use?

[shstrang98]

So we have (had) a 2016 Tahoe LT with the 5.3 8 banger and it started giving a blinking check engine light and later a continuously illuminated check engine light. It idled rough and sometimes ran rough running up through RPMs. We bought it new and only put
14500 miles on it. The warranty was aged out.
We traded it in on a new 2020.
A friend of my wife bought it. The dealer said it just had two fouled plugs from not being driven often.
I figure this is BS. It’s not a late 60s Muria.
What do you think?

Thanks


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[007matman]

It's possible.. the symptoms you're describing are in line with that issue.

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[shstrang98]

It's possible.. the symptoms you're describing are in line with that issue.

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Thanks for your reply.

 

[dnt1010]

Some of the 5.3 engines were notorious oil burning engines and that will foul a plug pretty quickly. Good thing you got rid of it. It must have been an early 2015 buy for the factory 5year-60k powertrain warranty to already be out?

 

[shstrang98]

Some of the 5.3 engines were notorious oil burning engines and that will foul a plug pretty quickly. Good thing you got rid of it. It must have been an early 2015 buy for the factory 5year-60k powertrain warranty to already be out?

Funny thing is that the oil level never dropped.
It may have been built in 2015 but it was purchased new in 2016 and said 2016 on it. The bumper to bumper had aged out. Plugs are not covered by power train.
On my new one I bought the 75k bumper to bumper. It's a 2020 and the last year they're making this generation. Maybe they got it right.

 

[007matman]

I do like buying later models specifically for that reason. First year or two they're always working out the bugs.

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[swathdiver]

So we have (had) a 2016 Tahoe LT with the 5.3 8 banger and it started giving a blinking check engine light and later a continuously illuminated check engine light. It idled rough and sometimes ran rough running up through RPMs. We bought it new and only put
14500 miles on it. The warranty was aged out.
We traded it in on a new 2020.
A friend of my wife bought it. The dealer said it just had two fouled plugs from not being driven often.
I figure this is BS. It’s not a late 60s Muria.
What do you think?

Thanks


Sent from my iPhone using Tapatalk

How often did y'all drive it? How long was the commute to work or wherever? If only a few miles, the motor never got hot enough to burn off deposits, such as if it was burning inexpensive fuel.

 

[drakon543]

the ultimate catch to owning or buying vehicles. occasionally driving the vehicle is a must and proper maintenance the same. if its not driven things dry out and can rust and corrode faster. if its not driven long enough the engine wont warm up it can also lead to the exhaust system prematurely rusting out. engines are certainly more advanced than back in the day when old timers used to run different spark plugs on the farm truck. basic concept of suck bang blow are still the same so it doesn't happen quite as often as it used to but it still does happen. its also why im more leary of buying the grandmas grocery getter bingo car than i am someones daily driver.

 

[JonnyTahoe]

the ultimate catch to owning or buying vehicles. occasionally driving the vehicle is a must and proper maintenance the same. if its not driven things dry out and can rust and corrode faster. if its not driven long enough the engine wont warm up it can also lead to the exhaust system prematurely rusting out. engines are certainly more advanced than back in the day when old timers used to run different spark plugs on the farm truck. basic concept of suck bang blow are still the same so it doesn't happen quite as often as it used to but it still does happen. its also why im more leary of buying the grandmas grocery getter bingo car than i am someones daily driver.

I'll take Grandma's any day. Plugs are cheap.

 

[drakon543]

I'll take Grandma's any day. Plugs are cheap.

plugs are then universals or cv shafts based on the vehicle due to drying out. then potential gaskets after gaskets because the engine was never allowed to properly heat up and go through its heat cycles. and now that you would actually be taking it out of town 55mph plus you start finding more problems blah blah. its not just fouled spark plugs from sitting. 15 20 yr old vehicle thats never seen anything above 35 mph. that or vs a vehicle thats been regularly driven by a responsible person. then lets be honest some of the truely elderly shouldn't be driving anymore for various reasons. before my great grandmother past away and before they finally took her driving privileges she swung by our old house. her inspection was over due by 7 yrs and she honestly had no clue. obviously wasn't being maintained.

 

[drakon543]

not that i wouldn't buy a grandmas car id just be alot more picky about checking it over.