Need MaxxECU base tune
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chris white
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BTW - the ground signal from the ECU is quite short - hard to measure on anything but a scope
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chris white
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BTW - plan B is to let your buddy hold the spark plug and you can judge the signal strentgh by how loud he screams at you.
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blueline
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chris white wrote: Wed Apr 16, 2025 7:49 am BTW - plan B is to let your buddy hold the spark plug and you can judge the signal strentgh by how loud he screams at you.
Tim
Current:
'26 911 Carrera S - PTS Verde British Racing Green
'24 Cayenne S - Algarve Blue Metallic
'21 718 Cayman GTS - Black
'22 911 Turbo S - Carmine Red
'21 718 Cayman GT4 - White
'11 GMC 1500 Quad Cab 4x4 - Black
Musik-Stadt Region
Current:
'26 911 Carrera S - PTS Verde British Racing Green
'24 Cayenne S - Algarve Blue Metallic
'21 718 Cayman GTS - Black
'22 911 Turbo S - Carmine Red
'21 718 Cayman GT4 - White
'11 GMC 1500 Quad Cab 4x4 - Black
Musik-Stadt Region
Here are my ignition settings in case anything jumps out.
As far as I can tell everything is registering correctly. I’m seeing good RPM, IAT, CLT, trigger sensors.
As far as I can tell everything is registering correctly. I’m seeing good RPM, IAT, CLT, trigger sensors.
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cda951
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That "output voltage" setting of 5V seems like a good place to look, 944 coil needs 12V. This also could explain the dim test light.
Post a screen shot of the other options in the output voltage drop-down menu.
Post a screen shot of the other options in the output voltage drop-down menu.
Chris A.
---'86 944 Turbo track rat
---'90 944S2 Cab daily/touring car
---'73 BMW 2002tii road rally car
---'81 Alfa Romeo GTV6 GT car/Copart special
---'99 BMW Z3 Coupe daily driver/dog car
---'74 Jensen-Healey roadster
---other stuff
---'86 944 Turbo track rat
---'90 944S2 Cab daily/touring car
---'73 BMW 2002tii road rally car
---'81 Alfa Romeo GTV6 GT car/Copart special
---'99 BMW Z3 Coupe daily driver/dog car
---'74 Jensen-Healey roadster
---other stuff
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chris white
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is the ECU powering the coil? the 5v setting seems odd - you mentioned that you were reading 12v at the coil.cda951 wrote: Wed Apr 16, 2025 6:41 pm That "output voltage" setting of 5V seems like a good place to look, 944 coil needs 12V. This also could explain the dim test light.
Post a screen shot of the other options in the output voltage drop-down menu.
Not sure what the 5v setting means?!
I don’t know, yetchris white wrote: Thu Apr 17, 2025 8:01 amis the ECU powering the coil? the 5v setting seems odd - you mentioned that you were reading 12v at the coil.cda951 wrote: Wed Apr 16, 2025 6:41 pm That "output voltage" setting of 5V seems like a good place to look, 944 coil needs 12V. This also could explain the dim test light.
Post a screen shot of the other options in the output voltage drop-down menu.
Not sure what the 5v setting means?!
but this is where I’m focusing my troubleshooting for now. Also looking at dwell time per your earlier comment. And yes, the ECU is powering the coil with the help of an IGBT driver, which is installed. Need to make sure that’s working too.-
chris white
- Posts: 434
- Joined: Wed Aug 11, 2021 11:40 am
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yes, it is. so i wonder what the 5v setting it for?