Need some help, CEL and 10.0 AFR at idle
05-13-2017, 07:25 PM
#1
Need some help, CEL and 10.0 AFR at idle
After switching to an O/R X-pipe the car started acting strange a couple days later.
One night after a run in Mexico the CEL started flashing and eventually turned off. Later that night made another pull and CEL came on and has stayed on ever since.
Now, the car seemed completely normal for a while with the CEL on.
Lately when I start the car and take it around the block, the AFR is reading 10.0 in drive under light throttle whenever I'm trying to move from a stop. The car bogs and feels like it wants to stall.
Could this be a bad MAF? My tuner is not in town right now and I cant datalog anything yet.
The first couple times this happened I pulled over and restarted the car and everything was fine. AFR was good in drive and everything.
Now upon starting AFR in park starts around 12 and slowly drops to 10.0....
The stuttering under light throttle is so bad I am afraid to try and drive through it to see if it cleans up. I may have to end up towing the car to the tuner next week.
Just frustrated and wanted to know if any of yall have experienced this or have any clue what is going on. And yes, I know this is going to be practically impossible to diagnose over the internet lol.
2011 GS A6
93/meth
ECS 1500
restricted
long tubes
no cats
10.7 PSI
stock motor
One night after a run in Mexico the CEL started flashing and eventually turned off. Later that night made another pull and CEL came on and has stayed on ever since.
Now, the car seemed completely normal for a while with the CEL on.
Lately when I start the car and take it around the block, the AFR is reading 10.0 in drive under light throttle whenever I'm trying to move from a stop. The car bogs and feels like it wants to stall.
Could this be a bad MAF? My tuner is not in town right now and I cant datalog anything yet.
The first couple times this happened I pulled over and restarted the car and everything was fine. AFR was good in drive and everything.
Now upon starting AFR in park starts around 12 and slowly drops to 10.0....
The stuttering under light throttle is so bad I am afraid to try and drive through it to see if it cleans up. I may have to end up towing the car to the tuner next week.
Just frustrated and wanted to know if any of yall have experienced this or have any clue what is going on. And yes, I know this is going to be practically impossible to diagnose over the internet lol.
2011 GS A6
93/meth
ECS 1500
restricted
long tubes
no cats
10.7 PSI
stock motor
05-14-2017, 09:56 PM
#3
Race Director
Member Since: May 2004
Location: Raleigh, NC
Posts: 16,664
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St. Jude Donor '15
Yeah without logs or error codes or something to go by it's pretty much shooting in the dark
Could be MAF
Could be IAT
Could be O2 sensor
Tough to say
Could be MAF
Could be IAT
Could be O2 sensor
Tough to say
05-15-2017, 08:08 AM
#4
Team Owner
Flashing CEL is BAD. Sounds like you may have melted a plug.
But as others said, pull the CEL first, otherwise it is just shooting in the dark. After that pull the plugs and inspect them to make sure something didn't come apart. Flashing CEL under boost indicates a misfire.
But as others said, pull the CEL first, otherwise it is just shooting in the dark. After that pull the plugs and inspect them to make sure something didn't come apart. Flashing CEL under boost indicates a misfire.
