weird issue after BPB & OFT install - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

DAN_BRZ · 06-09-2014, 02:21 PM

I am experiencing a few issues since ive installed my BPB w/OFT tune.
When the car is cold, it will randomly stall when i come to a light or stop sign, this has happened 4 times now since installing 3 weeks ago. normally happens if im leaving in a rush and dont let the the car warm up. i normally let the the car warm to reg idle and then go.

Second issue i am having appears to be with the tune itself. i seem to get a hicup/misfire or some weird lag around 3-3100 rpm range, hard to explain, but u can feel it. car seems to act strangely around that rpm under but only during light throttle. if im on the gas a bit more i dont notice it at all. anyone else experience this.

Thanks.

Basket Case · 06-09-2014, 10:31 PM

Have you tried pulling a battery terminal and resetting the ecu?

Andrew025 · 06-09-2014, 10:37 PM

Quote:

Originally Posted by Basket Case

Have you tried pulling a battery terminal and resetting the ecu?

Shouldn't be necessary after flashing a new tune.

Basket Case · 06-09-2014, 10:39 PM

It shouldn't be, but it's worth a try.

EAGLE5 · 06-09-2014, 10:42 PM

If the problem occurs on your stock tune, you know it's a physical problem. If it goes away then it may be a tune issue.

jflogerzi · 06-09-2014, 11:04 PM

Quote:

Originally Posted by DAN_BRZ

I am experiencing a few issues since ive installed my BPB w/OFT tune.
When the car is cold, it will randomly stall when i come to a light or stop sign, this has happened 4 times now since installing 3 weeks ago. normally happens if im leaving in a rush and dont let the the car warm up. i normally let the the car warm to reg idle and then go.

Second issue i am having appears to be with the tune itself. i seem to get a hicup/misfire or some weird lag around 3-3100 rpm range, hard to explain, but u can feel it. car seems to act strangely around that rpm under but only during light throttle. if im on the gas a bit more i dont notice it at all. anyone else experience this.

Thanks.

Don't you need a tune for those to be even effective? Most people lost power till properly tuned. Did shiv send you a tune to support these mods?

JimmyMac · 06-09-2014, 11:51 PM

Yeah, I would try the stock tune and eliminate that possible cause. Also be sure your vacuum hose is zip tied down at the back of the intake. The hose is too short once the BPB is/are installed and needs to be checked. An air leak will cause idle problems. This happened to me when I first installed my BPB. Zip tied both ends and no issues since.

calmtigers · 06-09-2014, 11:52 PM

I would suggest just directly calling Vishnu.

Shiv@Openflash · 06-10-2014, 12:29 AM

Quote:

Originally Posted by JimmyMac

Yeah, I would try the stock tune and eliminate that possible cause. Also be sure your vacuum hose is zip tied down at the back of the intake. The hose is too short once the BPB is/are installed and needs to be checked. An air leak will cause idle problems. This happened to me when I first installed my BPB. Zip tied both ends and no issues since.

This would be my suggestion as well. When we first installed BPB on our shop car, we ran into this issue. If you have a leak there, you will have stalling issues. Definitely worth checking out. It's unlikely to be a tune issue since the BPB maps are 99% the same as the standard OTS maps. Only difference is some minor tweaks to fuel/timing/vvt at high RPM. Definitely wouldn't introduce any idle issues.

Cheers,
shiv

DAN_BRZ · 06-10-2014, 11:09 AM

Quote:

Originally Posted by JimmyMac

Yeah, I would try the stock tune and eliminate that possible cause. Also be sure your vacuum hose is zip tied down at the back of the intake. The hose is too short once the BPB is/are installed and needs to be checked. An air leak will cause idle problems. This happened to me when I first installed my BPB. Zip tied both ends and no issues since.

I did zip tie the top vac hose and i know that its good and tight but im a dumb ass and didnt think about zipping down the bottom part of the vac line. i will do that tonight. its not really an idle issue, the does idle fine 99% if the time. just random stalls when not fully warm coming to a stop... but ill zip my lower hose tonight.

Turdinator · 06-10-2014, 10:53 PM

A vacuum leak would be my first guess also.

06-09-2014, 02:21 PM	#1
DAN_BRZ Senior Member Join Date: Apr 2013 Drives: 2013 WRB BRZ Sport Tech Location: Mississauga Posts: 413 Thanks: 311 Thanked 122 Times in 73 Posts Mentioned: 7 Post(s) Tagged: 2 Thread(s)	weird issue after BPB & OFT install I am experiencing a few issues since ive installed my BPB w/OFT tune. When the car is cold, it will randomly stall when i come to a light or stop sign, this has happened 4 times now since installing 3 weeks ago. normally happens if im leaving in a rush and dont let the the car warm up. i normally let the the car warm to reg idle and then go. Second issue i am having appears to be with the tune itself. i seem to get a hicup/misfire or some weird lag around 3-3100 rpm range, hard to explain, but u can feel it. car seems to act strangely around that rpm under but only during light throttle. if im on the gas a bit more i dont notice it at all. anyone else experience this. Thanks.

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06-09-2014, 10:31 PM	#2
Basket Case Senior Member Join Date: Jun 2013 Drives: 2013 Raven fr-s Location: Southwest Florida Posts: 450 Thanks: 193 Thanked 176 Times in 99 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	Have you tried pulling a battery terminal and resetting the ecu?

06-09-2014, 10:39 PM	#4
Basket Case Senior Member Join Date: Jun 2013 Drives: 2013 Raven fr-s Location: Southwest Florida Posts: 450 Thanks: 193 Thanked 176 Times in 99 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	It shouldn't be, but it's worth a try.

06-09-2014, 11:51 PM	#7
JimmyMac Senior Member Join Date: Aug 2012 Drives: 2013 FR-S, 2016 Miata Club Location: NC Posts: 785 Thanks: 183 Thanked 258 Times in 171 Posts Mentioned: 7 Post(s) Tagged: 0 Thread(s)	Yeah, I would try the stock tune and eliminate that possible cause. Also be sure your vacuum hose is zip tied down at the back of the intake. The hose is too short once the BPB is/are installed and needs to be checked. An air leak will cause idle problems. This happened to me when I first installed my BPB. Zip tied both ends and no issues since.

06-09-2014, 11:52 PM	#8
calmtigers Senior Member Join Date: Oct 2013 Drives: 2014 Whiteout TRD FR-S 6MT Location: Fresno / DTLA Posts: 928 Thanks: 628 Thanked 376 Times in 214 Posts Mentioned: 8 Post(s) Tagged: 0 Thread(s)	I would suggest just directly calling Vishnu.

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