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STFT Failure (Help)

nissan gtr loss loss of power no boost troubleshoot stft failure stft fuel cut fbo

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#1 majj35

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Posted 03 March 2017 - 11:51 AM

Updated.

 

I'm hoping for help and input while I work on finding shop(s)/appointments etc..and parts to order. I DAILY my 2014 FBO on flexfuel for 2+ years now. I barely run on e85. been a year i haven't. Always on pump 93.

 

2 years ago, I got a CEL and checked my accessport showing:

 

-P0138 - O2 Sensor circuit high voltage (Bank 1 Sensor 2)

-P0139 - O2 sensor slow response (Bank 1 Sensor 2)

-P0158 - O2 Sensor circuit high voltage (Bank 2 Sensor 2)

-P0159 - O2 Sensor slow response (Bank 2 Sensor 2) 

 

I cleared the codes and never got it again for 2 years, until recently. In the past 2 months, I've been getting the same codes (not all 4 together-varies) probably 5-6 times (2-3 days apart after clearing codes).

 

Before these codes starting showing up more often, I drove one night on an empty strip on manual.. floored from 2nd to 5th ran fine. On my way back, the boost cuts at 4K rpms and car won't accelerate even when pedal is fully pressed. But no CEL. I stop for a second and its back to normal. 

I noticed this keeps happening when I accelerate over 4K rpms, and shift up... then won't pass 4K. Using cobb I had the following Limp Status: 02 (which is STFT failure). Also STFT ranges from 85%-125%. I ran a datalog to send to tuner...just waiting to get a cable. I lost it lol.  

 

in the meantime .. until I send the datalogs. I would appreciate any help so I could speed things up.  is this just a fuel pump failure that needs to be replaced? is it caused by the O2 sensor that ive been ignoring lol? Thanks!

 

 

 


Edited by majj35, 29 March 2017 - 11:55 AM.

2014 Black Edition | Alpha 7

unnamed_zpsocgsfbgd.jpg

FBO • FlexFuel

Engine:    Alpha Street fmic | Sakura 3" intakes | Asnu 1100cc | Asnu 330lph | Visconti FlexFuel v2


Exhaust: Alpha Downpipes | Cobb Midpipes | HKS Legamax Titanium


Exterior: Rexpeed K-style Splitter | Rexpeed Skirts | Difflow Fins | '15 Lights | 3M Trunk Wrap


Interior:  DCT Steering Wheel | COBB ApV3-005


Wheels: Advan RS-D 20x9.5/20x10.5 | TiTek Lugs | Eibach Spacers 15F/20R | Pzero 285/295


 


603whp/605wtq (pump 93)
  

646whp/661wtq (e85)



 

1968 Camaro SS 350V8 (for sale)

Instagram: @gwynethbluepearl


#2 Wicked

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Posted 03 March 2017 - 12:22 PM

Safety trip?


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#3 majj35

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Posted 03 March 2017 - 01:24 PM

Safety trip?

 

not sure what that is


2014 Black Edition | Alpha 7

unnamed_zpsocgsfbgd.jpg

FBO • FlexFuel

Engine:    Alpha Street fmic | Sakura 3" intakes | Asnu 1100cc | Asnu 330lph | Visconti FlexFuel v2


Exhaust: Alpha Downpipes | Cobb Midpipes | HKS Legamax Titanium


Exterior: Rexpeed K-style Splitter | Rexpeed Skirts | Difflow Fins | '15 Lights | 3M Trunk Wrap


Interior:  DCT Steering Wheel | COBB ApV3-005


Wheels: Advan RS-D 20x9.5/20x10.5 | TiTek Lugs | Eibach Spacers 15F/20R | Pzero 285/295


 


603whp/605wtq (pump 93)
  

646whp/661wtq (e85)



 

1968 Camaro SS 350V8 (for sale)

Instagram: @gwynethbluepearl


#4 Wicked

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Posted 03 March 2017 - 01:48 PM

Did you log the events?


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Switzer Stage 1 Tranny Build
Switzer 90mmSS Exhaust = Loud as Fawk!!

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#5 majj35

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Posted 03 March 2017 - 03:31 PM

Did you log the events?

I haven't since it goes back to normal once I park the car or fully stop


2014 Black Edition | Alpha 7

unnamed_zpsocgsfbgd.jpg

FBO • FlexFuel

Engine:    Alpha Street fmic | Sakura 3" intakes | Asnu 1100cc | Asnu 330lph | Visconti FlexFuel v2


Exhaust: Alpha Downpipes | Cobb Midpipes | HKS Legamax Titanium


Exterior: Rexpeed K-style Splitter | Rexpeed Skirts | Difflow Fins | '15 Lights | 3M Trunk Wrap


Interior:  DCT Steering Wheel | COBB ApV3-005


Wheels: Advan RS-D 20x9.5/20x10.5 | TiTek Lugs | Eibach Spacers 15F/20R | Pzero 285/295


 


603whp/605wtq (pump 93)
  

646whp/661wtq (e85)



 

1968 Camaro SS 350V8 (for sale)

Instagram: @gwynethbluepearl


#6 majj35

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Posted 05 March 2017 - 06:36 PM

Limp status 2... any idea?? Sent from my iPhone using Tapatalk

2014 Black Edition | Alpha 7

unnamed_zpsocgsfbgd.jpg

FBO • FlexFuel

Engine:    Alpha Street fmic | Sakura 3" intakes | Asnu 1100cc | Asnu 330lph | Visconti FlexFuel v2


Exhaust: Alpha Downpipes | Cobb Midpipes | HKS Legamax Titanium


Exterior: Rexpeed K-style Splitter | Rexpeed Skirts | Difflow Fins | '15 Lights | 3M Trunk Wrap


Interior:  DCT Steering Wheel | COBB ApV3-005


Wheels: Advan RS-D 20x9.5/20x10.5 | TiTek Lugs | Eibach Spacers 15F/20R | Pzero 285/295


 


603whp/605wtq (pump 93)
  

646whp/661wtq (e85)



 

1968 Camaro SS 350V8 (for sale)

Instagram: @gwynethbluepearl


#7 iamnotthestig

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Posted 05 March 2017 - 06:48 PM

boost leak maybe? not bad enough to affect the car at idle, but once you hit boost, it bleeds off all the pressure?



#8 majj35

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Posted 05 March 2017 - 07:11 PM

boost leak maybe? not bad enough to affect the car at idle, but once you hit boost, it bleeds off all the pressure?


It did that same issue again, loss of power and wont go past 4k rpms. Then i go on auto mode and its back to normal


Sent from my iPhone using Tapatalk

2014 Black Edition | Alpha 7

unnamed_zpsocgsfbgd.jpg

FBO • FlexFuel

Engine:    Alpha Street fmic | Sakura 3" intakes | Asnu 1100cc | Asnu 330lph | Visconti FlexFuel v2


Exhaust: Alpha Downpipes | Cobb Midpipes | HKS Legamax Titanium


Exterior: Rexpeed K-style Splitter | Rexpeed Skirts | Difflow Fins | '15 Lights | 3M Trunk Wrap


Interior:  DCT Steering Wheel | COBB ApV3-005


Wheels: Advan RS-D 20x9.5/20x10.5 | TiTek Lugs | Eibach Spacers 15F/20R | Pzero 285/295


 


603whp/605wtq (pump 93)
  

646whp/661wtq (e85)



 

1968 Camaro SS 350V8 (for sale)

Instagram: @gwynethbluepearl


#9 AndyR35

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Posted 06 March 2017 - 12:46 PM

Have you run a check with the AP for any codes?

#10 majj35

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Posted 06 March 2017 - 02:10 PM

Have you run a check with the AP for any codes?

 

 

yeah i had the Accessport running. No codes or CEL came up. Dynamic ADV was -1/0  , and limp status 0/2   ( but not at the same time)


2014 Black Edition | Alpha 7

unnamed_zpsocgsfbgd.jpg

FBO • FlexFuel

Engine:    Alpha Street fmic | Sakura 3" intakes | Asnu 1100cc | Asnu 330lph | Visconti FlexFuel v2


Exhaust: Alpha Downpipes | Cobb Midpipes | HKS Legamax Titanium


Exterior: Rexpeed K-style Splitter | Rexpeed Skirts | Difflow Fins | '15 Lights | 3M Trunk Wrap


Interior:  DCT Steering Wheel | COBB ApV3-005


Wheels: Advan RS-D 20x9.5/20x10.5 | TiTek Lugs | Eibach Spacers 15F/20R | Pzero 285/295


 


603whp/605wtq (pump 93)
  

646whp/661wtq (e85)



 

1968 Camaro SS 350V8 (for sale)

Instagram: @gwynethbluepearl


#11 yianni

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Posted 11 March 2017 - 08:53 AM

I had a similar issue and it was a secondary pump failure Sent from my SM-G930V using Tapatalk

#12 GODzilla LIN

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Posted 11 March 2017 - 04:56 PM

Last time it happen to me, my intake tube was not tight and loose air, check all bolts to be secure. But this is me tho....

Have you done any installs after this happen?


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#13 majj35

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Posted 16 March 2017 - 07:44 AM

Last time it happen to me, my intake tube was not tight and loose air, check all bolts to be secure. But this is me tho....

Have you done any installs after this happen?

 

I've been on this setup for almost 2 years now. This is the first time it happens... no installs have been done since.


2014 Black Edition | Alpha 7

unnamed_zpsocgsfbgd.jpg

FBO • FlexFuel

Engine:    Alpha Street fmic | Sakura 3" intakes | Asnu 1100cc | Asnu 330lph | Visconti FlexFuel v2


Exhaust: Alpha Downpipes | Cobb Midpipes | HKS Legamax Titanium


Exterior: Rexpeed K-style Splitter | Rexpeed Skirts | Difflow Fins | '15 Lights | 3M Trunk Wrap


Interior:  DCT Steering Wheel | COBB ApV3-005


Wheels: Advan RS-D 20x9.5/20x10.5 | TiTek Lugs | Eibach Spacers 15F/20R | Pzero 285/295


 


603whp/605wtq (pump 93)
  

646whp/661wtq (e85)



 

1968 Camaro SS 350V8 (for sale)

Instagram: @gwynethbluepearl


#14 majj35

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Posted 16 March 2017 - 07:45 AM

I had a similar issue and it was a secondary pump failure Sent from my SM-G930V using Tapatalk

 

Oem or aftermarket pumps?


2014 Black Edition | Alpha 7

unnamed_zpsocgsfbgd.jpg

FBO • FlexFuel

Engine:    Alpha Street fmic | Sakura 3" intakes | Asnu 1100cc | Asnu 330lph | Visconti FlexFuel v2


Exhaust: Alpha Downpipes | Cobb Midpipes | HKS Legamax Titanium


Exterior: Rexpeed K-style Splitter | Rexpeed Skirts | Difflow Fins | '15 Lights | 3M Trunk Wrap


Interior:  DCT Steering Wheel | COBB ApV3-005


Wheels: Advan RS-D 20x9.5/20x10.5 | TiTek Lugs | Eibach Spacers 15F/20R | Pzero 285/295


 


603whp/605wtq (pump 93)
  

646whp/661wtq (e85)



 

1968 Camaro SS 350V8 (for sale)

Instagram: @gwynethbluepearl


#15 tjlazer

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Posted 16 March 2017 - 02:01 PM

You need to log the Safety trip to see if that is what it is.  Cobb has a Safety feature that will do as you describe if anything exceed the safety levels set by tuner.  It will pull power to protect the engine.


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#16 majj35

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Posted 17 March 2017 - 11:21 AM

You need to log the Safety trip to see if that is what it is.  Cobb has a Safety feature that will do as you describe if anything exceed the safety levels set by tuner.  It will pull power to protect the engine.


Is that an option i can choose to log? Because i found "Limp Status" cant remember if safety trip was on the list


Sent from my iPhone using Tapatalk

2014 Black Edition | Alpha 7

unnamed_zpsocgsfbgd.jpg

FBO • FlexFuel

Engine:    Alpha Street fmic | Sakura 3" intakes | Asnu 1100cc | Asnu 330lph | Visconti FlexFuel v2


Exhaust: Alpha Downpipes | Cobb Midpipes | HKS Legamax Titanium


Exterior: Rexpeed K-style Splitter | Rexpeed Skirts | Difflow Fins | '15 Lights | 3M Trunk Wrap


Interior:  DCT Steering Wheel | COBB ApV3-005


Wheels: Advan RS-D 20x9.5/20x10.5 | TiTek Lugs | Eibach Spacers 15F/20R | Pzero 285/295


 


603whp/605wtq (pump 93)
  

646whp/661wtq (e85)



 

1968 Camaro SS 350V8 (for sale)

Instagram: @gwynethbluepearl


#17 tjlazer

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Posted 17 March 2017 - 01:32 PM

That's it


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#18 majj35

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Posted 20 March 2017 - 01:54 PM

That's it


I'll try to datalog, but when i had the accessport running w safety limp it said 2


Sent from my iPhone using Tapatalk

2014 Black Edition | Alpha 7

unnamed_zpsocgsfbgd.jpg

FBO • FlexFuel

Engine:    Alpha Street fmic | Sakura 3" intakes | Asnu 1100cc | Asnu 330lph | Visconti FlexFuel v2


Exhaust: Alpha Downpipes | Cobb Midpipes | HKS Legamax Titanium


Exterior: Rexpeed K-style Splitter | Rexpeed Skirts | Difflow Fins | '15 Lights | 3M Trunk Wrap


Interior:  DCT Steering Wheel | COBB ApV3-005


Wheels: Advan RS-D 20x9.5/20x10.5 | TiTek Lugs | Eibach Spacers 15F/20R | Pzero 285/295


 


603whp/605wtq (pump 93)
  

646whp/661wtq (e85)



 

1968 Camaro SS 350V8 (for sale)

Instagram: @gwynethbluepearl


#19 haul s

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Posted 20 March 2017 - 10:00 PM

I'll try to datalog, but when i had the accessport running w safety limp it said 2


You're tripping STFT safety (see https://cobbtuning.a...t/view/78610496 for other safety codes).

I had a similar issue and it was a secondary pump failure


Yep, either a pump is on its way out, or the post-filter finally got plugged up.

Either way, I see a Visconti fuel basket in your future. ;)
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#20 majj35

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Posted 21 March 2017 - 08:15 AM

You're tripping STFT safety (see https://cobbtuning.a...t/view/78610496 for other safety codes).


Yep, either a pump is on its way out, or the post-filter finally got plugged up.

Either way, I see a Visconti fuel basket in your future. ;)

 

 

Hi, thanks thats very helpful. Could you please educate me more.. lol  I currently have 1100cc ASNU injectors and ASNU 330lph pumps... which pumps are you talking about? 

 

I might be going for service this weekend, is it an oem part replacement or.. what do I need? Thanks !

 

note: I haven't used e85 for over a year now. I've had the injectors/pumps for almost 2yrs now.


Edited by majj35, 21 March 2017 - 08:22 AM.

2014 Black Edition | Alpha 7

unnamed_zpsocgsfbgd.jpg

FBO • FlexFuel

Engine:    Alpha Street fmic | Sakura 3" intakes | Asnu 1100cc | Asnu 330lph | Visconti FlexFuel v2


Exhaust: Alpha Downpipes | Cobb Midpipes | HKS Legamax Titanium


Exterior: Rexpeed K-style Splitter | Rexpeed Skirts | Difflow Fins | '15 Lights | 3M Trunk Wrap


Interior:  DCT Steering Wheel | COBB ApV3-005


Wheels: Advan RS-D 20x9.5/20x10.5 | TiTek Lugs | Eibach Spacers 15F/20R | Pzero 285/295


 


603whp/605wtq (pump 93)
  

646whp/661wtq (e85)



 

1968 Camaro SS 350V8 (for sale)

Instagram: @gwynethbluepearl



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