Afm failure cylinder 6

[Justin Yeager]

Would it show different code if valves weren't seating correctly? Maybe head gasket leak sucking in air? I was hoping it would clear up after fuel treatment with every tank but same problem still there. If I drive under 60 and like a grandma codes will not show up

 

[Kraig]

Anyone think a TPS relearn would help synchronize the TPS, MAP, and MAF correlation?
OP; have you looked at TPS position with it running/driving?

 

[Kraig]

After thinking more about this, I don’t think you have carboned valves or a leaky head gasket—you’d be pushing air out or drinking coolant, not getting a vacuum leak.
Have you watched MAF or MAP values while driving under the conditions that trip the codes. I’m kinda wondering if maybe hammer time causes you to lose a ground that affects all three sensors.

 

[Justin Yeager]

I actually replaced tps over the weekend and did relearn without scan tool. Idles fine till p0106 shows up. I have service brakes soon after cam swap as well. Pads are brand new. Maybe not making enough vacuum? Wish I had a better scanner, just don't have the funds for a nice unit. I have toque pro with cheap bluetooth adapter. It has new cam sensor that was changed when swap was done

 

[swathdiver]

I've swapped intake tube with maf from 07 suburban no change. Best friend drives burb 220000 miles and afm just failed on his. Cylinder 1 for him but same crap. Ate the cam. Been over intake checking every seam and factory plugs nothing seemed wrong. And i spayed staying fluid and I mean I soaked entire intake. No change in trims or idle. I've ruled out leak in intake tube and intake. Tried propane even to Get under intake thinking it was there. I've swapped everything I can think of from his with no change. Might just throw his intake on and see what happens

I actually replaced tps over the weekend and did relearn without scan tool. Idles fine till p0106 shows up. I have service brakes soon after cam swap as well. Pads are brand new. Maybe not making enough vacuum? Wish I had a better scanner, just don't have the funds for a nice unit. I have toque pro with cheap bluetooth adapter. It has new cam sensor that was changed when swap was done

I think you're doing everything right to eliminate each possibility Justin. As for vacuum, the ECM takes a reading from different places in different scales. If the Torque Pro can read the Brake Control Module, it should pick up inches of vacuum off the booster.

You might want to post over at Performance Trucks forum.

@01ssreda4 @Scottydoggs @soulsea @67RS427 @SnowDrifter @Galante @kbuskill @OneofFew @gpracer1 @randeez

 

[SnowDrifter]

You mentioned you had a different tune on there for the afm delete

What happens if you you put the stock one back? Map/maf codes come back?

 

[Justin Yeager]

Had ams racing tune the computer. Can I change it without hp tuners?

 

[Kraig]

A stock tune is going to include AFM and throw different codes—it needs a custom tune with this cam in mind. It may or may not be the tune, but I doubt it’s a vacuum leak like they’re saying.

 

[PG01]

The tune they loaded better of had afm delete in it since they sold him an afm delete kit..... but ya never know.

I don’t think you have vacuum leaks/ problems i think you have a bent pin or connector or wire shorting on exhaust or pinched somewhere and when you get on it it moves or grounds throwing your code, that is, if you are really stomping on it. Maybe your motor mount is bad and the motor lifts just enough to pull on one of your connectors that you plugged back in....

 

[SnowDrifter]

A stock tune is going to include AFM and throw different codes—it needs a custom tune with this cam in mind. It may or may not be the tune, but I doubt it’s a vacuum leak like they’re saying.

Indeed. But my thoughts were this:

Chasing down wiring can be a time consuming process. If OP has the means of quickly applying the stock tune, we can determine if it's an issue with the tune or something else and start looking from there.