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1/22/2020 12:12:56 PM
Posted: 1/20/2015 6:16:27 PM EST
I know there are different forms of this, and that some manufacturers have been more successful than others.

What are the different approaches, what works, what doesn't, and is it worth it?
Link Posted: 1/20/2015 6:19:47 PM EST
Originally Posted By Bassgasm:
I know there are different forms of this, and that some manufacturers have been more successful than others.

What are the different approaches, what works, what doesn't, and is it worth it?
View Quote


It makes a fully loaded 5000lb+ pound v6 Honda Odyssey get 30mpg on the highway.
Link Posted: 1/20/2015 6:22:50 PM EST
Cadillac pioneered it. 8-6-4.

It didn't work very well.
Link Posted: 1/20/2015 6:24:46 PM EST
[Last Edit: 1/20/2015 6:25:26 PM EST by digitalebola]
My 2005 dodge magnum 5.7l had cylinder deactivation.

If I was sensible I could get 22mpg all day long on the highway. Otherwise it was 15mpg.

Deactivation occurred when the car was in 4th or 5th gear, steady throttle and I think it was 40mph or above.
Link Posted: 1/20/2015 6:28:12 PM EST
Just had the AFM camshaft replaced on my 2011 silverado @ 75k miles. Dealer rep said that issues with them were pretty common.

That and the cylinder deactivation only really seems to work if you stay out of the throttle completely several seconds at a time.
Link Posted: 1/20/2015 6:28:51 PM EST
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By DarkCharisma:
Cadillac pioneered it. 8-6-4.

It didn't work very well.
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So true..I worked at a GM dealership back in 1981.. it was a very low water
mark time for GM.
Link Posted: 1/20/2015 6:31:09 PM EST
I think it's a stopgap.

I have a newer chevy V8 with it and an older Chevy V8 without it. Curious to see if any issues arise on the newer V8, we shall see.
Link Posted: 1/20/2015 6:46:24 PM EST
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By MillerSHO:
I think it's a stopgap.

I have a newer chevy V8 with it and an older Chevy V8 without it. Curious to see if any issues arise on the newer V8, we shall see.
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AFM kills lifters.

Do a DOD delete, imho. The 5.3L is plenty efficient without it.
Link Posted: 1/20/2015 7:17:57 PM EST
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By DarkCharisma:



AFM kills lifters.

Do a DOD delete, imho. The 5.3L is plenty efficient without it.
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Discussion ForumsJump to Quoted PostQuote History
Originally Posted By DarkCharisma:
Originally Posted By MillerSHO:
I think it's a stopgap.

I have a newer chevy V8 with it and an older Chevy V8 without it. Curious to see if any issues arise on the newer V8, we shall see.



AFM kills lifters.

Do a DOD delete, imho. The 5.3L is plenty efficient without it.


I've heard the 5.3s have had problems related to this, but I've heard it has something to do with oil usage.

Do other engines have issues related to cylinder deactivation?
Link Posted: 1/20/2015 8:11:22 PM EST
[Last Edit: 1/20/2015 8:12:00 PM EST by DarkCharisma]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By Bassgasm:


I've heard the 5.3s have had problems related to this, but I've heard it has something to do with oil usage.

Do other engines have issues related to cylinder deactivation?
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View All Quotes
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By Bassgasm:
Originally Posted By DarkCharisma:
Originally Posted By MillerSHO:
I think it's a stopgap.

I have a newer chevy V8 with it and an older Chevy V8 without it. Curious to see if any issues arise on the newer V8, we shall see.



AFM kills lifters.

Do a DOD delete, imho. The 5.3L is plenty efficient without it.


I've heard the 5.3s have had problems related to this, but I've heard it has something to do with oil usage.

Do other engines have issues related to cylinder deactivation?



As far as I know, all the Gen IV's that use AFM have either oil consumption and/or lifter problems. FWIW it seems that the folks that are having problems aren't following maintenance routines, but there are some low-cost AFM deletes out there that basically just turn it back into a non-AFM variant.

As it relates to other engines, I have zero knowledge about the robustness of their cylinder deactivation systems.
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