Engine Misfiring and Stalling - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

FIREISFUN135 · 09-19-2016, 12:13 AM

So this problem came up after my battery died. The car starts and idles but after it warms up it just bogs and misfires when you give it gas then dies. No CEL or codes.

2013 BRZ 45K
-Avo turbo kit
-Delicous tuning flash & go reflash
-Nameless 3 inch downpipe
-Perrin 3 inch catback
-Avo catch can
-3 Bar MAP

Tried-
Cleaning the MAF
Checking the Cat to see if it was clogged

Any Ideas?

pantdino · 09-19-2016, 12:19 AM

Quote:

Originally Posted by FIREISFUN135

So this problem came up after my battery died. The car starts and idles but after it warms up it just bogs and misfires when you give it gas then dies. No CEL or codes.

2013 BRZ 45K
-Avo turbo kit
-Delicous tuning flash & go reflash
-Nameless 3 inch downpipe
-Perrin 3 inch catback
-Avo catch can
-3 Bar MAP

Tried-
Cleaning the MAF
Checking the Cat to see if it was clogged

Any Ideas?

I know nothing about flashes, but does it have to be reflashed after losing battery power for X amount of time?

Sounds like the mixture is way off, like the CEU is giving way too little fuel.

steve99 · 09-19-2016, 01:39 AM

Quote:

Originally Posted by FIREISFUN135

So this problem came up after my battery died. The car starts and idles but after it warms up it just bogs and misfires when you give it gas then dies. No CEL or codes.

2013 BRZ 45K
-Avo turbo kit
-Delicous tuning flash & go reflash
-Nameless 3 inch downpipe
-Perrin 3 inch catback
-Avo catch can
-3 Bar MAP

Tried-
Cleaning the MAF
Checking the Cat to see if it was clogged

Any Ideas?

flat battery wont effect tune in ecu its in flash memory.

did you relpace battery or just charge it, check battery volts

check any connections you touched

check maf plugged in correctly and gasket under maf is good

Mr.ac · 09-19-2016, 03:57 AM

Could be a vacuum leak. Check turbo hoses for leaks and clamps are tight.

guybo · 09-19-2016, 06:19 AM

How is your total trim after it warms up and starts to run like crap? AFR?

FIREISFUN135 · 09-19-2016, 07:42 AM

New battery, checked the alternator, and all other electronical connections. No obvious lose turbo or vacuum lines. It drove around fine but once it warm up same problem. It didn't want to restart and you could smell gas for alittle bit. Let it sit and fired right up. Trying to find my cable so I can log this

guybo · 09-19-2016, 08:17 AM

Also does your fuel pressure look good? First task is is to figure out if it's missing because of a prob with fuel or fire, then work back. If you don't have a CEL, I'd suspect fuel pump since it's a hot soak issue.

The battery problem could be incidental. Why did you replace the battery? Did you have it tested?

FIREISFUN135 · 09-19-2016, 03:19 PM

It's getting fuel at least from the pump. Battery went bad and it was tested and replaced.

09-19-2016, 12:13 AM	#1
FIREISFUN135 Member Join Date: Mar 2012 Drives: 2013 BRZ DGM Location: USF,Tampa, FL Posts: 69 Thanks: 32 Thanked 35 Times in 12 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Engine Misfiring and Stalling So this problem came up after my battery died. The car starts and idles but after it warms up it just bogs and misfires when you give it gas then dies. No CEL or codes. 2013 BRZ 45K -Avo turbo kit -Delicous tuning flash & go reflash -Nameless 3 inch downpipe -Perrin 3 inch catback -Avo catch can -3 Bar MAP Tried- Cleaning the MAF Checking the Cat to see if it was clogged Any Ideas? __________________ 2013 DGM BRZ <-current 2006 WRB STi <-sold 2004 ES1 Civic <-sold

09-19-2016, 03:57 AM	#4
Mr.ac [insert cool phrase here] Join Date: Aug 2015 Drives: BRZ Premium Location: Central Coast CA Posts: 2,369 Thanks: 709 Thanked 1,558 Times in 930 Posts Mentioned: 30 Post(s) Tagged: 0 Thread(s)	Could be a vacuum leak. Check turbo hoses for leaks and clamps are tight. __________________ New daily driver - Subaru BRZ Premium Weekend fun/track car - '91 MR2 Turbo Gen3 Old daily driver - '88 MR2 Supercharged

09-19-2016, 07:42 AM	#6
FIREISFUN135 Member Join Date: Mar 2012 Drives: 2013 BRZ DGM Location: USF,Tampa, FL Posts: 69 Thanks: 32 Thanked 35 Times in 12 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	New battery, checked the alternator, and all other electronical connections. No obvious lose turbo or vacuum lines. It drove around fine but once it warm up same problem. It didn't want to restart and you could smell gas for alittle bit. Let it sit and fired right up. Trying to find my cable so I can log this __________________ 2013 DGM BRZ <-current 2006 WRB STi <-sold 2004 ES1 Civic <-sold

09-19-2016, 03:19 PM	#8
FIREISFUN135 Member Join Date: Mar 2012 Drives: 2013 BRZ DGM Location: USF,Tampa, FL Posts: 69 Thanks: 32 Thanked 35 Times in 12 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	It's getting fuel at least from the pump. Battery went bad and it was tested and replaced. __________________ 2013 DGM BRZ <-current 2006 WRB STi <-sold 2004 ES1 Civic <-sold

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09-19-2016, 06:19 AM	#5
guybo Huge E85 fan! Join Date: May 2016 Drives: 2016 Scion FRS Location: Tampa, FL, USA Posts: 1,850 Thanks: 539 Thanked 1,010 Times in 605 Posts Mentioned: 32 Post(s) Tagged: 0 Thread(s)	How is your total trim after it warms up and starts to run like crap? AFR?

09-19-2016, 08:17 AM	#7
guybo Huge E85 fan! Join Date: May 2016 Drives: 2016 Scion FRS Location: Tampa, FL, USA Posts: 1,850 Thanks: 539 Thanked 1,010 Times in 605 Posts Mentioned: 32 Post(s) Tagged: 0 Thread(s)	Also does your fuel pressure look good? First task is is to figure out if it's missing because of a prob with fuel or fire, then work back. If you don't have a CEL, I'd suspect fuel pump since it's a hot soak issue. The battery problem could be incidental. Why did you replace the battery? Did you have it tested?

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