Uaefi to honda help

Steveweippert · Post by **Steveweippert** » Mon Dec 09, 2024 8:44 pm

Hi guys I've almost got my uaefi wired up to my honda obd1 dcwerx ss-obd1 breakout board but want to make sure my connections are correct and do I need to use the cyp and ckp connections or can I just run the tdcp and tdcm from the honda into vr1+ and vr1-. I finally got the rusefi tunerstudio plugin to work so would love to get this thing in the car. I've gotten it to run on a speeduino v0.4 but wanted more so I got a uaefi to run it. The car is a 1993 honda civic d16z6 engine the distributor setup is the same as a b16 twin cam. Attached is a rundown of what connections I've made so far the list on the right are the uaefi pins and the honda ecu are on the left. Thanks a ton in advance.

Steveweippert · Post by **Steveweippert** » Mon Dec 09, 2024 8:45 pm

Hi guys I've almost got my uaefi wired up to my honda obd1 dcwerx ss-obd1 breakout board but want to make sure my connections are correct and do I need to use the cyp and ckp connections or can I just run the tdcp and tdcm from the honda into vr1+ and vr1-. I finally got the rusefi tunerstudio plugin to work so would love to get this thing in the car. I've gotten it to run on a speeduino v0.4 but wanted more so I got a uaefi to run it. The car is a 1993 honda civic d16z6 engine the distributor setup is the same as a b16 twin cam. Attached is a rundown of what connections I've made so far the list on the right are the uaefi pins and the honda ecu are on the left. Thanks a ton in advance.

Steveweippert · Post by **Steveweippert** » Mon Dec 09, 2024 8:46 pm

The list

Steveweippert · Post by **Steveweippert** » Mon Dec 09, 2024 8:48 pm

My spaghetti

Post by **AndreyB** » Mon Dec 09, 2024 9:55 pm

there is an official obd1 pinout - please hit the button in "popular vehicles"

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Steveweippert · Post by **Steveweippert** » Mon Dec 09, 2024 11:31 pm

Were do I find that menu? There is an actual pinout on there?

jasaircraft · Post by **jasaircraft** » Thu Oct 02, 2025 6:44 pm

Steveweippert wrote: ↑
Mon Dec 09, 2024 11:31 pm
Were do I find that menu? There is an actual pinout on there?

how is your build going?
i made one uaefi run that distributor some days ago, b16/b20 engine.
i had however issues with triggers at idle although im not sure its uaefi, sensors or noise/ bad rotor setup
however past 2krpm it sings amazing.
i have concluded that its best to bin the dizzy and go COP and a hall effect crank trigger kit.
i had to use a 3.75kohm resistor across the one tooth signal as it would mess up trigger around 2krpm.
seems results on this setup is still on a gray area.

Wombat · Post by **Wombat** » Sun Jan 11, 2026 3:42 am

You are better off by far going to coil on plug.
If you are on a budget you can use the dizzy sensors - one 24 tooth and one single tooth for your coil on plug triggers, just disable power to the internal ICM and coil/ remove them, they are unreliable and will leave you stranded without warning.
Most people have trouble with Honda internal coils and Dizzys because the coil interferes with the sensor signals, the exception was the old OBD-1 ignition systems that had separate coils and igniters which were very reliable.

Hope this helps.

rusefi.com