OBD 2 to OBD 1 sensor question for M52 OBD 1 conversion

[El Gato Liso]

hi

im unsure about something...

the knock sensors from my m50 don't look good. the knock sensors on the m52 look great! the wires for the OBD2 knock sensors are bigger (diameter) while the OBD 1 sensors are smaller in diameter. Can I just cut and splice the M52 knock sensors to the M50 knock sensor plugs, to create make shift OBD 1 knock sensors?

the same thing goes for the coolant temperature sensor. the M50 has 2, the M52 has 1. can I just use the OBD 2 sensor and plug, and splice it the OBD 1 M50 coolant temp sensors plugs? it will be like making the plug and play conversion kit by Turner Mother Sports!

Thanks
-rob

[valleymotorwerks]

Coolant temp yes - measure the ohmic value of the knock sensors, if they match splice away.

[20gmr]

doesnt the coolant temp read incorrectly when you splice into the obd2 sensor.....you need to use the brown single pin sensor from the m20

[Rugbyfan]

Buy a modded Temp sensor from Markert Motorworks. No drilling or tapping your head, no adapters, it's plug and play OBD-1:

http://www.markertmotorworks.com/MMWProducts.html

2nd one down under "e30 24V swap products"

[328ijunkie]

DONT splice the knock sensors. If you insist on running OBD1 buy new or good used OBD1 ones. The OBD2 ones will do nothing but cause you issues youll never be able to figure out. Theyre highly shielded and different than the OBD1 ones and any sort of splicing you do will make the ECU freak.