PicoScope 7 Automotive
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2005 honda hrv misfire problem
2005 honda hrv misfire problem
Ok i have 2005 honda hrv with 1.6l engine with distributor that has buy ecu multiple misfire. I scoped exhaust and intake to verify which cyl. is missing and i got cyl no4 on idle. I did running compression on cyl 4 and cyl 3 with wps 500 and i didnt find any problems. I cant get secondary what ever i do it not readable so i got primary. Im uploading all of my takes maybe i missed some thing
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- Honda_HR-V_2005_20220903-0035.psdata
- (10.77 MiB) Downloaded 201 times
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- Honda_HR-V_2005_20220903-0034.psdata
- (26.15 MiB) Downloaded 181 times
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- Honda_HR-V_2005_20220903-00031.psdata
- (11.91 MiB) Downloaded 171 times
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- Honda_HR-V_2005_20220903-0002.psdata
- (11.89 MiB) Downloaded 176 times
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Tomblueprintauto
- OneWave
- Posts: 12
- Joined: Fri Oct 01, 2021 4:06 am
Re: 2005 honda hrv misfire problem
Please add more channel labels and notes about what we are actually looking at. Makes it more likely that you will get good help
I notice that in your secondary ignition waveform that the energy at the end of the burn time is quite high when compared with the firing voltage. The height first oscillation is almost the same voltage in some cases. Maybe a lean condition? What are your fuel trims?
I notice that in your secondary ignition waveform that the energy at the end of the burn time is quite high when compared with the firing voltage. The height first oscillation is almost the same voltage in some cases. Maybe a lean condition? What are your fuel trims?
Re: 2005 honda hrv misfire problem
Honda_HR-V_2005_20220903-0002 in this one red trace is intake manifold vacuum blue is exhaust back pressure and green is inj no 1 captured idle no load
Honda_HR-V_2005_20220903-00031.psdata same as above but it is on idle under the load
Honda_HR-V_2005_20220903-0034.psdata running compression on cyl #3 + full throttle
Honda_HR-V_2005_20220903-0035.psdata primary ignition
I will check today how are my fuel trims before it was ok but it was not missing so much. Yesterday i found interesting thins i was measuring alt ac ripples and exhaust pressure and ac is running high 90mv and when car is missing ac ripple is mimicking exhaust back.I will put up screen capture tummorow. One more think costumer stated that car was running fine when winter comes and when it gets hot car starts to miss. I even tried to move inj #4 to inj#3 to see if the miss is going to move bu it didnt
Honda_HR-V_2005_20220903-00031.psdata same as above but it is on idle under the load
Honda_HR-V_2005_20220903-0034.psdata running compression on cyl #3 + full throttle
Honda_HR-V_2005_20220903-0035.psdata primary ignition
I will check today how are my fuel trims before it was ok but it was not missing so much. Yesterday i found interesting thins i was measuring alt ac ripples and exhaust pressure and ac is running high 90mv and when car is missing ac ripple is mimicking exhaust back.I will put up screen capture tummorow. One more think costumer stated that car was running fine when winter comes and when it gets hot car starts to miss. I even tried to move inj #4 to inj#3 to see if the miss is going to move bu it didnt