AFM Question
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No problems thus far in my 2014. Only have 10K miles on the car and have been using the Range AFM Eliminator since I bought the car with 2600 miles on it.
Melting Slicks
Joined: Aug 2018
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From: Clermont, Florida
Yes. Purchased 2019 C7 M7 brand new and never had it in ECO Mode once. Lifter failed at 50,000 miles and took out the camshaft. Repaired under manufacturer's warranty.
Last edited by DrivesWithTwoFeet; Mar 1, 2026 at 08:24 PM.
Melting Slicks
Joined: Aug 2018
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From: Clermont, Florida
AFM elimination by Range Device or tune doesn't solve the issue. The AFM parts are still there and can fail even if car never went into V4 mode. The only resolution is an AFM delete were all the AFM parts are replaced with none AFM parts.
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I've never had an issue. I have a manual and only use it on the freeway.
As said the parts are there unless you remove them. The rumor is that the time they are most likely to fail is during the transition which is why a lot of people turn it off. If you have a stick that's easy, just don't use Eco mode.
I think like most things failures are over blown in terms of the percentage, for every catastrophic failure there are 1000 people who have no issue.
As said the parts are there unless you remove them. The rumor is that the time they are most likely to fail is during the transition which is why a lot of people turn it off. If you have a stick that's easy, just don't use Eco mode.
I think like most things failures are over blown in terms of the percentage, for every catastrophic failure there are 1000 people who have no issue.
Instructor
Joined: Aug 2021
Posts: 237
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From: Jacksonville Fl
[QUOTE=Wmpjr;1609475849]Has anyone here had a problem with the afm system in their corvette?[/QUOTE
]
I own a shop and we do several per year. Corvette, Tahoe, Silverado. It's not always a dod lifter either. Sometimes it's one of the reg lifters that failed or a broken valve spring.
]
I own a shop and we do several per year. Corvette, Tahoe, Silverado. It's not always a dod lifter either. Sometimes it's one of the reg lifters that failed or a broken valve spring.
Melting Slicks
Joined: Feb 2018
Posts: 2,151
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From: North Texas
Kind of like 'poking' a bear just to give him some exercise............................or maybe you!
AFM lifters don't need to be poked and exercised. My advice is to just leave them turned off. A lot of failures occur durning the transisition between V8 and V4. GM had a video on the AFM system and mentioned this failure mode.
AFM lifters don't need to be poked and exercised. My advice is to just leave them turned off. A lot of failures occur durning the transisition between V8 and V4. GM had a video on the AFM system and mentioned this failure mode.
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I Love My C7
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Team Owner
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It involves the camshaft and lifter replacement. THIS is the kit. After that, I would probably have it tuned. From past experience, almost any tune will be able to give you a WOT tune, The hard part would be to get the part between idle and WOT, which is where the car spends most of the time, to be as smooth as factory.
I Love My C7
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[QUOTE=GreenVette9;1609477727]
THis really just gives me the warm and fuzzys...SMH. We had a torque tube failure already in the Silverado...that was 5k to fix. Now we can look forward to the AFM failure too- 