How to log cylinder misfire count with an OBD 2 Reader ? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

LeMeteor · 06-30-2023, 05:32 AM

My engine is misfiring at idle, it's very subtle but there's definitely something wrong.
I'd like to log the misfire count but I cannot find that data in my OBD 2 app ( Car Scanner )
I'm guessing I have to add a custom PID or something ?

I also have an OFT, but same, I can't find how to log cylinder misfire count

Thank you

humfrz · 06-30-2023, 06:54 PM

If a code is showing, it should tell which cylinder is misfiring.

Back in the day, we used to pull the spark plug wires off one at a time till the engine speed changed.

Never mind me - It's PAST ma nap time -

LeMeteor · 07-01-2023, 03:54 AM

Thank you ! It's not throwing a CEl but I can definitely feel some intermittent vibration and RPM dip at idle (without the AC)

humfrz · 07-02-2023, 03:03 PM

Quote:

Originally Posted by LeMeteor

Thank you ! It's not throwing a CEl but I can definitely feel some intermittent vibration and RPM dip at idle (without the AC)

How many miles on your spark plugs?

If much over 50,000, it may be time for some new plugs.

Turdinator · 07-03-2023, 10:00 PM

Quote:

Originally Posted by LeMeteor

Thank you ! It's not throwing a CEl but I can definitely feel some intermittent vibration and RPM dip at idle (without the AC)

What mods do you have?

GJR726WY · 07-19-2023, 09:16 AM

Quote:

Originally Posted by LeMeteor

Thank you ! It's not throwing a CEl but I can definitely feel some intermittent vibration and RPM dip at idle (without the AC)

I use Torque with an OBDII bluetooth adapter and it logs misfires by default without a custom PID. It does however take the scan quite a while to display the data, and it's at the bottom of the list.

LeMeteor · 07-26-2023, 07:23 AM

Hey guys, thanks for the help
I actually managed to log the Misfire with the OFT, I just had to go back to the settings and set "My car" to GT86

I had a lot of misfires on cylinder 4, changed the port injectors, coilpacks and all of the sparks, it made things slighty better but the problem was still there.
Went back to the garage, changed the direct injector on cylinder 4, now all good

06-30-2023, 05:32 AM	#1
LeMeteor Junior Member Join Date: May 2021 Drives: 2013 gt86 Location: France Posts: 4 Thanks: 0 Thanked 2 Times in 2 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	How to log cylinder misfire count with an OBD 2 Reader ? My engine is misfiring at idle, it's very subtle but there's definitely something wrong. I'd like to log the misfire count but I cannot find that data in my OBD 2 app ( Car Scanner ) I'm guessing I have to add a custom PID or something ? I also have an OFT, but same, I can't find how to log cylinder misfire count Thank you Last edited by LeMeteor; 06-30-2023 at 08:11 AM.

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06-30-2023, 06:54 PM	#2
humfrz Senior Member Join Date: May 2013 Drives: 2013 FR-S, white, MT Location: Puyallup, WA Posts: 29,872 Thanks: 28,793 Thanked 31,826 Times in 16,429 Posts Mentioned: 708 Post(s) Tagged: 2 Thread(s)	If a code is showing, it should tell which cylinder is misfiring. Back in the day, we used to pull the spark plug wires off one at a time till the engine speed changed. Never mind me - It's PAST ma nap time -

07-01-2023, 03:54 AM	#3
LeMeteor Junior Member Join Date: May 2021 Drives: 2013 gt86 Location: France Posts: 4 Thanks: 0 Thanked 2 Times in 2 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Thank you ! It's not throwing a CEl but I can definitely feel some intermittent vibration and RPM dip at idle (without the AC)

07-26-2023, 07:23 AM	#7
LeMeteor Junior Member Join Date: May 2021 Drives: 2013 gt86 Location: France Posts: 4 Thanks: 0 Thanked 2 Times in 2 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Hey guys, thanks for the help I actually managed to log the Misfire with the OFT, I just had to go back to the settings and set "My car" to GT86 I had a lot of misfires on cylinder 4, changed the port injectors, coilpacks and all of the sparks, it made things slighty better but the problem was still there. Went back to the garage, changed the direct injector on cylinder 4, now all good

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