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Schematics for 1227165 (1227808 with additional IC U2)
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bf6379
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Schematics for 1227165 (1227808 with additional IC U2)
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antus
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Re: Schematics for 1227165 (1227808 with additional IC U2)
Thanks for that. I'll make it a sticky.
For anyone looking for simiar content for other ECMs around the same era there is also a mirror of the original source (Ludis' site) with schematics and other content which we have mirrored here https://pcmhacking.net/ludis/
For anyone looking for simiar content for other ECMs around the same era there is also a mirror of the original source (Ludis' site) with schematics and other content which we have mirrored here https://pcmhacking.net/ludis/
Have you read the FAQ? For lots of information and links to significant threads see here: http://pcmhacking.net/forums/viewtopic.php?f=7&t=1396
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pman92
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Re: Schematics for 1227165 (1227808 with additional IC U2)
Awesome. I know you've also got the memcal page mirrored here. What else is mirrored here, or is that it?
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antus
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TX Gemini SR20 18psi
Datsun 1200 Ute
Subaru Blitzen '06 EZ30 4th gen, 3.0R Spec B
Subaru WRX 2007
Re: Schematics for 1227165 (1227808 with additional IC U2)
https://pcmhacking.net/memcals.html
Thats the only two. They both seemed like great information we couldnt afford to loose.
Thats the only two. They both seemed like great information we couldnt afford to loose.
Have you read the FAQ? For lots of information and links to significant threads see here: http://pcmhacking.net/forums/viewtopic.php?f=7&t=1396
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Holden202T
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Re: Schematics for 1227165 (1227808 with additional IC U2)
No matter what the question is, the answer is always more horsepower! 
Just starting out? Have a read of the getting started guide
Basic tuning of a delco ECM with $12P thread
Advanced tuning of a delco ECM with $12P thread
Just starting out? Have a read of the getting started guide
Basic tuning of a delco ECM with $12P thread
Advanced tuning of a delco ECM with $12P thread
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charlay86
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Re: Schematics for 1227165 (1227808 with additional IC U2)
For those of you who can't get simulated narrowband O2 signal from a wideband lambda controller to work with these (and later) ECMs:
If you look at the inputs schematic and take note of the O2 sensor amplifier, you will note that it has two inputs pins.
O2HI - obvious, the narrowband signal comes in here.
O2LO - perhaps less obvious, it needs to connect directly to the signal ground PIN on the wideband controller.
Ideally you would splice the wideband controller signal ground wire (goes to engine block ) and O2LO wire (to ECM) as close as possible to the wideband controller, ideally in the connector.
If you look at the inputs schematic and take note of the O2 sensor amplifier, you will note that it has two inputs pins.
O2HI - obvious, the narrowband signal comes in here.
O2LO - perhaps less obvious, it needs to connect directly to the signal ground PIN on the wideband controller.
Ideally you would splice the wideband controller signal ground wire (goes to engine block ) and O2LO wire (to ECM) as close as possible to the wideband controller, ideally in the connector.