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08-14-2011, 10:00 AM
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#1 |
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Banned
Drives: 2011 2SS/RS Silver Join Date: Jul 2011
Location: Morristown NJ
Posts: 103
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AFM Question
I've noticed on my new 2011 SS A6 that while tooling around town 30-40 mph, the car seems to pull forward then coast, pull forward then coast, etc, but I am not accelerating or taking my foot off the gas. I don't think it's gearing up and down either, could this be the AFM system? Does anyone else notice such a thing?
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08-14-2011, 10:30 AM
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#2 |
 
Drives: 2011 Victory Red Auto 2SS Join Date: Aug 2010
Location: West Tn
Posts: 628
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Yep. But notice it at other speeds also. It will seem as it is lugging and them start running smoothly again, as it switches back to 8 cycl mode.
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08-14-2011, 10:34 AM
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#3 |
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Go Blue!!!!!
Drives: 2012 Cruze LT Join Date: Mar 2009
Location: Indiana
Posts: 23,290
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Yes, that is the AFM system that you are experiencing.
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08-15-2011, 07:55 AM
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#4 |
 Drives: 2009 Pontiac G8 GT Join Date: Sep 2009
Location: Victoria, TX
Posts: 52
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It may be AFM kicking in and out, but it also may be the cam going from a retarded intake centerline (sometimes 25 degrees retarded) to fully advanced. The engine has more cylinder pressure with the cam in the fully advanced position and will be peppier. The retarded cam position is where you pick up fuel economy, but the engine is lazier. In a nutshell, you could be feeling the cam phasing.
__________________
 2013 Corvette Grand Sport A6 Forged 416, Greg Good ported TFS 255 LS3 heads, ECS NOVI 1500 blower, 222/242 .629/.604 121LSA EPS cam, ARH 1 7/8" headers, NPP exhaust, 747rwhp/709rwtq on 93 octane, no meth, w/stock street manners. 2014 GMC Yukon XL Denali, Air Raid MIT, tuned. 2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph Texas Mile 2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 Texas Mile LS1,LS2,LS3,LS7 Custom Camshaft Specialist |
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08-16-2011, 10:27 PM
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#5 | |
 
Drives: 85 Vette, 07 Escalade ESV, 03 GMC, Join Date: Nov 2009
Location: Austin, TX
Posts: 927
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Quote:
It's just the retarded AFM system at its best 
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 ADM Performance installed and tuned: Maggie, Stainless Works Power LTs, ADM race cai, ADM ZL1 scoop Whiteside Customs Super Street 2 Package w/ coilovers BC Racing Coilovers and lowered, Whiteline Bushings & Swaybars MBRP catback exhaust, ZL1 bumper conversion, Drake billet shifter, Hurst paddles, NLP rear spoiler, OEM GFX, Vis Racing hood, ASA GT5 wheels |
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08-17-2011, 08:03 AM
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#6 |
 
Drives: 2010 CAMARO 850 RWHP/733 RWTQ Join Date: Sep 2010
Location: Lafayette,LA
Posts: 300
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 So very true !!
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08-22-2011, 08:40 PM
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#7 |
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Banned
Drives: 2011 2SS/RS Silver Join Date: Jul 2011
Location: Morristown NJ
Posts: 103
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Thanks guys!
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