question on MPG before and after AFM delete

[tiktok4321]

Another source of failure from what my mechanic told me is the lifter tray. These plastic trays can crack and cause the lifter to rotate, getting stuck.

 

[iamdub]

Another source of failure from what my mechanic told me is the lifter tray. These plastic trays can crack and cause the lifter to rotate, getting stuck.

Good point. It's cheap insurance to replace these, AFM or not, when the heads are off and torque their retaining bolts to spec to prevent cracking them around the bolt hole. It's not that sensitive of an issue, but there are plenty of gorilla-handed mechanics.

 

[the highlander]

anyone on the forum do programming? Anyone local to Michigan, Detroit or surrounding area?

Yes I can do it.. I am located in michigan. PM for info.

 

[conchasjim]

Well, it looks like I have a collapsed lifter on the number 6 cylinder. I've had a superchips tune with the tow haul tune which includes a AFM delete. I believe it does, as I haven't seen the prompt when it would go into the V4 mode in years.
With that in mind, it seems you can still have problems even when AFM has been deleted. So, what's the point in deleting it?
Also, if I replace all the lifters with ones that don't allow AFM, i.e. Collapsible lifters, do I still need to run a deleted AFM tune?

 

[swathdiver]

Well, it looks like I have a collapsed lifter on the number 6 cylinder. I've had a superchips tune with the tow haul tune which includes a AFM delete. I believe it does, as I haven't seen the prompt when it would go into the V4 mode in years.
With that in mind, it seems you can still have problems even when AFM has been deleted. So, what's the point in deleting it?
Also, if I replace all the lifters with ones that don't allow AFM, i.e. Collapsible lifters, do I still need to run a deleted AFM tune?

Less wear and tear is the point of tuning it out but it is still best to remove the system for ultimate reliability. If you're going to delete it, you must run a tune with it disabled or it'll throw codes. You must get a new camshaft, non AFM. When you start a new thread about collecting parts and selecting a cam, remind us of the year of your truck.

 

[PG01]

What he said^^^

 

[iamdub]

Well, it looks like I have a collapsed lifter on the number 6 cylinder. I've had a superchips tune with the tow haul tune which includes a AFM delete. I believe it does, as I haven't seen the prompt when it would go into the V4 mode in years.
With that in mind, it seems you can still have problems even when AFM has been deleted. So, what's the point in deleting it?
Also, if I replace all the lifters with ones that don't allow AFM, i.e. Collapsible lifters, do I still need to run a deleted AFM tune?

You disabled it with your tune, but didn't delete it which is going into the motor and removing the components. As James said, it's a midpoint way to hopefully buy you more time by not letting the system activate. It's better than nothing, but the crappy lifters are still in place and are still prone to failure, as you have experienced. Do you mean that your Superchips tune only disables AFM when in Tow/Haul mode?

 

[PG01]

You disabled it with your tune, but didn't delete it which is going into the motor and removing the components. As James said, it's a midpoint way to hopefully buy you more time by not letting the system activate. It's better than nothing, but the crappy lifters are still in place and are still prone to failure, as you have experienced. Do you mean that your Superchips tune only disables AFM when in Tow/Haul mode?

Thats a first......

 

[iamdub]

Thats a first......

What is?

 

[PG01]

What is?

Go back a few pages in this thread when you stop ******’ with Christmas lights....