Car jerking hard at WOT - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

bryan.catano93 · 06-12-2018, 09:26 AM

i just installed my JDL turbo kit. car starts and drives. yesterday i received my first revision and went to take a WOT log but the car jerks very hard past 4k rpm. ( what i think its boost cut ). i went and checked all the lines and they seem okay to me. theres 2 logs attached, one is regular driving and the other one is my attempt to WOT. could someone please take a look at my logs and maybe try to help me out.

thanks

Mods: JDL turbo kit, base journal bearing turbo, recirc nameless catless overpipe/frontpipe combo, trd catback.

bryan.catano93 · 06-12-2018, 09:37 AM

i cant upload the. csv file from the datalog. i can email them

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secho · 06-12-2018, 10:27 AM

Quote:

Originally Posted by bryan.catano93

i cant upload the. csv file from the datalog. i can email them

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Hi, upload it to the datazap.me and post the link.

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bryan.catano93 · 06-12-2018, 11:09 AM

Quote:

Originally Posted by secho

Hi, upload it to the datazap.me and post the link.

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https://datazap.me/u/bryancatano93/l...og=0&data=7-19

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sid94 · 06-12-2018, 11:33 AM

Mine would do the same after 4K but my problem was that I was tuning for 10psi but had 20psi spring in the wastegate lol

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secho · 06-12-2018, 11:42 AM

Quote:

Originally Posted by bryan.catano93

https://datazap.me/u/bryancatano93/l...og=0&data=7-19

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Without seeing the tune it is hard to decide. It might be boost cut, load limits, incorrecty set load axis and calculation (seems it fuelcuts above 2g/s of load). But at krást, you should fix fueling first. Fuel trims Are highly out of reasonable limits. Also flkc goes almost -5degs. Not So good.

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bryan.catano93 · 06-12-2018, 11:47 AM

Quote:

Originally Posted by secho

Without seeing the tune it is hard to decide. It might be boost cut, load limits, incorrecty set load axis and calculation (seems it fuelcuts above 2g/s of load). But at krást, you should fix fueling first. Fuel trims Are highly out of reasonable limits. Also flkc goes almost -5degs. Not So good.

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anywhere i should start checking? would thr fuel trims be out of spec due go boost leak?

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bryan.catano93 · 06-12-2018, 12:31 PM

i bought the kit used and saw that it has a recirc kit option from the wastegate. i didnt mention that to my tuner. would that have ajlnything to do with my issue?

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secho · 06-12-2018, 01:40 PM

Quote:

Originally Posted by bryan.catano93

i bought the kit used and saw that it has a recirc kit option from the wastegate. i didnt mention that to my tuner. would that have ajlnything to do with my issue?

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It might be an issue. But you have to consult with your tuner. Do you have the tuning file in decoded/open form? Can you read it in the ProEcu?

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Kodename47 · 06-12-2018, 05:12 PM

I would say that looks like boost cut, probably on an early revision tune to make sure everything is OK.

Irace86.2.0 · 06-12-2018, 05:35 PM

You have the JDL 3bar map sensor, right?

bryan.catano93 · 06-12-2018, 05:38 PM

Quote:

Originally Posted by secho

It might be an issue. But you have to consult with your tuner. Do you have the tuning file in decoded/open form? Can you read it in the ProEcu?

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im not sure if i do. yeah i talked to my tuner, hes out of town for the week tho so i kinda wanna do some. digging on my own

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bryan.catano93 · 06-12-2018, 05:39 PM

Quote:

Originally Posted by Irace86.2.0

You have the JDL 3bar map sensor, right?

4 bar map from jdl yes.

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bryan.catano93 · 06-12-2018, 05:40 PM

Quote:

Originally Posted by Kodename47

I would say that looks like boost cut, probably on an early revision tune to make sure everything is OK.

yeah its the first revision after the basemap. what could be causing the boost cut?

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06-12-2018, 09:26 AM	#1
bryan.catano93 Member Join Date: Feb 2018 Drives: 2013 frs Location: CA Posts: 39 Thanks: 0 Thanked 3 Times in 3 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Car jerking hard at WOT i just installed my JDL turbo kit. car starts and drives. yesterday i received my first revision and went to take a WOT log but the car jerks very hard past 4k rpm. ( what i think its boost cut ). i went and checked all the lines and they seem okay to me. theres 2 logs attached, one is regular driving and the other one is my attempt to WOT. could someone please take a look at my logs and maybe try to help me out. thanks Mods: JDL turbo kit, base journal bearing turbo, recirc nameless catless overpipe/frontpipe combo, trd catback.

06-12-2018, 05:12 PM	#10
Kodename47 Senior Member Join Date: Oct 2012 Drives: UK GT86 Location: UK Posts: 3,040 Thanks: 185 Thanked 1,629 Times in 1,112 Posts Mentioned: 155 Post(s) Tagged: 1 Thread(s)	I would say that looks like boost cut, probably on an early revision tune to make sure everything is OK. __________________ .: Stealth 86 :. Abbey Motorsport/K47 Tuned Sprintex 210 Supercharger Kodename 47 DJ: Soundcloud / Instagram / Facebook

06-12-2018, 05:35 PM	#11
Irace86.2.0 Senior Member Join Date: Mar 2017 Drives: Q5 + BRZ + M796 Location: Santa Rosa, CA Posts: 7,884 Thanks: 5,668 Thanked 5,805 Times in 3,299 Posts Mentioned: 70 Post(s) Tagged: 0 Thread(s)	You have the JDL 3bar map sensor, right? __________________ My Build \| K24 Turbo Swap \| K24T BRZ SOLD

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06-12-2018, 09:37 AM	#2
bryan.catano93 Member Join Date: Feb 2018 Drives: 2013 frs Location: CA Posts: 39 Thanks: 0 Thanked 3 Times in 3 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	i cant upload the. csv file from the datalog. i can email them Sent from my VTR-L09 using Tapatalk

06-12-2018, 11:33 AM	#5
sid94 Senior Member Join Date: Jan 2014 Drives: 2013 frs Location: Miami fl Posts: 206 Thanks: 38 Thanked 49 Times in 38 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Mine would do the same after 4K but my problem was that I was tuning for 10psi but had 20psi spring in the wastegate lol Sent from my iPhone using Tapatalk

06-12-2018, 12:31 PM	#8
bryan.catano93 Member Join Date: Feb 2018 Drives: 2013 frs Location: CA Posts: 39 Thanks: 0 Thanked 3 Times in 3 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	i bought the kit used and saw that it has a recirc kit option from the wastegate. i didnt mention that to my tuner. would that have ajlnything to do with my issue? Sent from my VTR-L09 using Tapatalk

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