Thank You GM AFM

[Rob Okray]

All comes down to cost. Cheaper to adapt existing platforms and deal with warranty issues if any than to start with a clean sheet. They will only innovate when they have to.

[swathdiver]

The same guy who did those 4-6-8 Cadillacs did AFM.  I loved my old 5.7 diesel Cutlass Supreme Brougham!

[Rob Okray]

https://www.carcomplaints.com/news/2016/gm-53l-oil-consumption-lawsuit.shtml

 

[Rob Okray]

http://www.hotrod.com/articles/simplifying-gen-iv-chevy-removing-active-fuel-management/

[Rob Okray]

I'm going to toss out a wild ass guess that supplier engineering plays a huge part in any AFM failures. Cheap parts will kill even the best design. We'll set aside the fact that we have yet to see a production engine designed from the ground up to be multi displacement. 

[swathdiver]

Gen IV AFM engines now have updated De-Ac lifters, a valve cover and VLOM.  How reliable are they?

 

How reliable have the Gen Vs been?  The newest ones are supposed to cut out more or less than just 4 certain cylinders now too.  Get the adults in Washington to eliminate the foolish CAFE standards and AFM/DOD will quickly head for the dust bin of history. 

[Bad Bowtie2]

On 3/17/2018 at 11:48 AM, Rob Okray said:

My buddy says I am paranoid and that the engine is "supposed to work that way" when I told him I was going to get a Range AFM defeat module. I said a v8 was designed to run on 8 cylinders and that the AFM was bound to fail. 21st century EPA appeasement tech grafted onto an engine that is an updated version of a near century old idea there was really nothing wrong with.

EXACTLY.