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Pickups Chevrolet Silverado & GMC Sierra 2007/2008 Silverado and Sierra Active Fuel Management Problems
106 messages, Last post on Sep 01, 2009 at 9:04 PM
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Replying to: dyma82 (May 14, 2009 7:43 am) |
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Replying to: rednecktroy (Dec 09, 2008 7:45 am)  HAS ANY ONE FOUND THE PROBLEM
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hey guys i got a 08 silverado crew 5.3L Z71 ltz w/ 10k on it & im just wondering if anyone is having this same problem when putting the vehicle in reverse (from drive only) there is a significant 3-5 sec. delay basically leaving me stranded in the middle of the road on a 3 pointer i've been to the dealer they updated the flashdrives for motor & tranny etc.. & still does the same thing & as usual its within the GM tolerance haha. tranny fluid levels are normal & i was just thinking if & i know this sounds out of this world ridiculous the afm has anything to do with it i wanna shut the afm off i think it just effects the total performance of the motor. I've been a long time gm owner & the 04' 5.3L is a monster thats why i stuck with the 5.3 & besides that ticking noise after 60mph the truck is a great truck oh 1 more thing can the afm be shut off by a tuner & is the hypertech tuner worth it thanks in advance guys "i just think afm shouldn't be a option when buying a truck a truck is a truck for power & balls fuel management is for the 4bangers & buy american we gotta keep this country alive & trucks is the reason why "
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Replying to: bspinz9 (May 27, 2009 10:04 am) |
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Replying to: hunter9296 (Dec 18, 2008 2:34 pm) I am having exactly the same issue with my 2007 Silverado 5.3 (Not Flex-Fuel). Thanks for your time.
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Replying to: bspinz9 (May 27, 2009 8:43 am) |
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Replying to: dyma82 (May 28, 2009 5:01 am)
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Replying to: rednecktroy (May 28, 2009 2:32 pm) I agree. Soft lifters could actually explain this problem (shaky idle), and reinforcing the theory is the fact that additionally to the shaky idle, my truck has always been affected by another issue, which is definitely caused by soft lifters (since it was 54 miles old). The other issue being: If I left my truck unused for more than two days, when I start it on the morning of the third day the engine sounds like a very bad diesel. Then little by little the lifters recharge and the sound goes away. It does it 3 times out 5 times I leave it unused for more than two days. I am trying to gather as much info as possible about this issue, its cause, and the solution, so that by the time I take it to the dealer I can “try” to get something useful out of them. |
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My 5.3 ltr 2008 Silverado runs great, but just doesn't cool effectively. The AFM seems smooth to me, and it makes good power for a 5.3 ltr engine. But long grades on the Freeway cause the temp to keep rising. I have to turn on the heater full blast, and slow down, to keep the gauge from continuing on up. I have had a few puzzling electrical problems, including stabilitrac system errors that are intermittent - wondering if the computer controls the electric fans ? and maybe that is the common root cause of my problem ? But the AFM works good - just not good gas mileage (around 12.6 to 13.2 mpg). Any hints from anyone ? Anyone else have cooling issues and low mileage ? (I have about 8000 miles on the truck now)
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Replying to: owns5chevys (Jul 08, 2009 6:57 pm) |
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