JB4tech.com - International Turbo Tuning Discussion
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Payam @ BMS's Avatar
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Default 06-06-2022, 08:45 PM

Doesn't look like the dyno run.

Always good to log dyno runs so we can see what it reflects.


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Default 06-08-2022, 10:10 AM

Gotcha Payam,

I'll keep that in mind the next time I go to the dyno.

Thanks again.
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xceleron428 xceleron428 is offline
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Default Car stuttering/misfiring - 07-19-2022, 07:58 PM

Hello,

I am new to tuning/JB4. I have a 2021 Honda Accord 2.0T that I recently installed the JB4 on. I usually keep it on map 2/3. Shortly after I've noticed that the car kind of stutters when I am trying to accelerate almost like the cyclinders are misfiring. It's a little scary since the first time it was on the freeway. I've attached a log of me just going around the block and the stuttering is still occurring. I have tried both v6 and v7 firmware but it made no difference. Hoping someone can shed some light on what might be happening. Thank you.
Attached Files
File Type: csv P90-M2-R1-220719-1926.csv (222.6 KB, 22 views)
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Payam @ BMS's Avatar
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Default 07-20-2022, 10:08 AM

Quote:
Originally Posted by xceleron428
Hello,

I am new to tuning/JB4. I have a 2021 Honda Accord 2.0T that I recently installed the JB4 on. I usually keep it on map 2/3. Shortly after I've noticed that the car kind of stutters when I am trying to accelerate almost like the cyclinders are misfiring. It's a little scary since the first time it was on the freeway. I've attached a log of me just going around the block and the stuttering is still occurring. I have tried both v6 and v7 firmware but it made no difference. Hoping someone can shed some light on what might be happening. Thank you.
Looks pretty normal here. Do you have any codes or CEL popping up, have you tried reading codes?
Attached Images
 


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It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.
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xceleron428 xceleron428 is offline
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Default 07-20-2022, 06:08 PM

I haven't tried to recreate the situation from the time I was on the freeway but the warning I got on my dashboard was "Emissions System Problem. Power May Be Reduced. See Your Dealer". Don't remember if it gave a code. When that warning came up it felt like no matter how hard I pushed on the accelerator the car was struggling to go. I pulled over, unplugged the tuner and everything was back to normal. I had about 2 months where everything went super smooth and then this issue starting happening out of nowhere. Can't seem to put my finger on possible causes. Trying to avoid having the tuner plugged in and getting on the freeway to try to reproduce the exact error.
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Terry @ BMS's Avatar
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Default 07-23-2022, 04:46 PM

Ideally lets try to get the code, it might be an issue with your high pressure fuel pump not keeping up at the higher power levels for example.


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