Another AFM issue?

g2full · November 2, 2019

12 minutes ago, bg1988 said:

5k is good you have 8qt

Yes. 8 always comes out and goes back in

Slash L86 · November 7, 2019

On 11/1/2019 at 1:29 PM, g2full said:

Another update -

Truck came back today. They did 2 lifters, the solenoid valley pan thing that controls the AFM lifters, Head Gasket, Oil Change, and Push Rod.

Was speaking with the tech and he's concerned that I also have an injector failing. He said my one fuel trim is at 18% and typically he likes to see plus or minus 5% of 0.

My concerns are - injectors aren't covered under my extended warranty/powertrain. Second concern is that I just ordered my Autocal and if I have an injector issue obviously I'll need to sort that out before I get it tuned. While running in the shop it actually came down 2%(to the 18%) so maybe the truck is just un happy that everything was apart?

What is everyones thoughts and or suggestions at this point?

Lucked out with extended warranty. I think head gasket would have been around 2000.

Definitely get a range afm delete.

Sierra Dan · November 7, 2019

Range type devices only add a band aid to the potential problems and are not a true "delete".

Here is a great site explaining why a delete kit works better than tuning afm out electronically.

Just my 2 cents.

http://bdturnkeyengines.com/afm-dod-info

g2full · November 7, 2019

12 minutes ago, Sierra Dan said:

Range type devices only add a band aid to the potential problems and are not a true "delete".

Here is a great site explaining why a delete kit works better than tuning afm out electronically.

Just my 2 cents.

http://bdturnkeyengines.com/afm-dod-info

Would definitely agree that a true delete kit would be better. However time and having the truck down that long to do such a thing isn’t in the cards right now.

Nick191847478393 · April 19, 2023

On 10/27/2019 at 5:01 PM, g2full said:

So, decided to beat on my truck a little last night, which I don't do often but from time to time I do stretch its' legs a bit.

Threw a check engine light and could feel a misfire.

So, pulled codes and sure enough misfire on cylinder #7. Today I swapped plugs and wires, cleared the code and fired it back up to have the same results. Pulled codes again - cylinder #7 misfire. Swapped coil packs around and the misfire stayed on #7.

Did a compression test - just a hair under 125 on cylinder #7. I didn't check the other cylinders, at this point I'm frustrated.

New plug is oil soaked from a 10 mile drive.

No obscure noises coming from the engine. Could this be an AFM lifter issue?

I do have a Zurich powertrain and will be taking it to the dealer tomorrow. Just want some opinions from the knowledge here.

Thanks!

15 Silverado 5.3 non flex fuel motor. 78k miles on it.

Old Thread but I am having same issue on my 2015 Silverado 1500. 118k miles CEL came on flashing when I was getting on the highway. Cyl #7

I suspect it’s going to be failed lifter because of the stupid AFM.
Sucks I literally bought the truck 6 months ago. Thankfully I also did the Zurich extended warranty. Truck goes into dealership tomorrow. Truck is bone stock and I baby it. Kind of disappointing