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Old 09-15-2012, 04:16 AM   #1
Rei_k's
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Join Date: Feb 2010
Default Fuel cut no CEL?

Hi all I wanted to know if anyone else has experienced fuel cut without getting a CEL? 1st time at the track I ran a 13.8 with no fuel cut, second attempted run I experienced what I believe to be fuel cut in the top of 1st gear shortly after launching the car "Dont remember exact rpm". Confused by what had just happend I did a 2nd gear pull which again resulted in fuel cut in the higher rpms approx 5-6k.

My car is a 2011 STI and I am running a catless TBE with cobb ap flashed for stage 2 93oct and I havent received any CEL. I ensured FFS remained off and checked for error codes with the AP and didnt find any. After checking all my hoses I decided to reflash the stage 2 map, refill my tank after low fuel light lit with vpower 93oct from shell and try some pulls. Only fuel cut was in the top of 1st gear around 5k and in 4th gear at 6k. I am calling this fuel cut but it doesnt really feel violent like I have read in other threads, it just loses all throttle response and lets the rpms drop at which time I quickly put the car in neutral. I have been data logging and my motor appears healthy and runs great as long as I stay out of high boost. I will post a data log when im home but I never saw boost get high enough to cause fuel cut. Also I have been stage 2 for roughly 900 miles with zero issues until this happened.

Thanks! Any constructive thoughts appreciated.
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Old 09-15-2012, 08:09 AM   #2
Rei_k's
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Default

Well I cannot post attachments for some reason. I did a 2nd-4th gear wot data log in and didn't have any fuel cut, and everything looks good. Max boost was 19.94 "target is 19 in S#" in 4th gear at 5k I did not continue to run past that due to a light rain. Not sure if .94 above target is enough to be concerned about.

Last edited by Rei_k's; 09-15-2012 at 08:16 AM.
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Old 09-15-2012, 03:45 PM   #3
Cobb Tuning
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Quote:
Originally Posted by Rei_k's View Post
Hi all I wanted to know if anyone else has experienced fuel cut without getting a CEL? 1st time at the track I ran a 13.8 with no fuel cut, second attempted run I experienced what I believe to be fuel cut in the top of 1st gear shortly after launching the car "Dont remember exact rpm". Confused by what had just happend I did a 2nd gear pull which again resulted in fuel cut in the higher rpms approx 5-6k.

My car is a 2011 STI and I am running a catless TBE with cobb ap flashed for stage 2 93oct and I havent received any CEL. I ensured FFS remained off and checked for error codes with the AP and didnt find any. After checking all my hoses I decided to reflash the stage 2 map, refill my tank after low fuel light lit with vpower 93oct from shell and try some pulls. Only fuel cut was in the top of 1st gear around 5k and in 4th gear at 6k. I am calling this fuel cut but it doesnt really feel violent like I have read in other threads, it just loses all throttle response and lets the rpms drop at which time I quickly put the car in neutral. I have been data logging and my motor appears healthy and runs great as long as I stay out of high boost. I will post a data log when im home but I never saw boost get high enough to cause fuel cut. Also I have been stage 2 for roughly 900 miles with zero issues until this happened.

Thanks! Any constructive thoughts appreciated.
You can post the logs on google docs and put the link here (make sure to set the permissions to public and to convert the file to google docs' native format). Or you can attach the log(s) at the cobb forums and then link here.

Bill
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