Discussion in 'Chevy Silverado Forum (GMC Sierra)' started by BlackBowtie, Mar 4, 2013.
lost me ,what is amf,learing as i go on here ,thanks
When it goes from 8 to 4 Cyl and back.. There is a TSB on this I just had the work done to my 08 5.3.
AFM this is active fuel management. the engine PCM determines when you need more power then it has all 8 cylinders working when at idle coasting you drop out cylinders to conserve fuel. this type engine has issues with oil .
I have read GM plans to dump these engines. new engines 2014. direct injection with variable valve timing . this is a good design to get max power and MPG. The question is can GM do it successfully??????
Who wants to be a TEST Rat for GM?
WE DO, WE DO; and everyone with a 5.3 AFM waves their hands
I'm still in it..
This conversation is reminding me, that I should check my oil level in the morning.
Ah yes, I do have the AMF motor.. so im guessing that explains alot.
I warm the vehicle up on cold mornings.. is this hurting it?
So I guess I have to live with this?
Go to dealer and talk to the Service guy..
I'm not familiar with this engine but due to mileage, age, or other gremlins you could have a problem with valve seals. I have an older GMC truck that currently has this problem. Cheers, Old Iron nut.
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