- Sun Mar 23, 2014 12:04 am
#343649
Ok that helps a lot
You have an OBD1 car, obd1 edu, obd1 harness and obd2 motor. Instead of converting everything to obd2, just convert the motor to OBD1. We still don't know what motor was in your car before... but Here's what i would do...
Put your OBD1 distributor onto the OBD2 motor. (not sure which motor the hatch had originally, it may not fit) OBD1 distributors have the crank position sensor built in. OBD2 motors have the crank position sensor behind the lower timing cover. So by using the OBD1 dizzy, you won't have to extend wiring to get to the obd2 crank sensor. Just leave the obd2 crank sensor alone, unplugged on your motor.
OBD2 motors came with secondary o2 sensor after the cat. OBD1 did not, so don't worry about that.
OBD2 blocks have knock sensors, OBD1 do not. So the OBD1 ecu is not going to look for one so just leave it unplugged on the block and forget about it.
The OBD1 injector clips may not fit the OBD2 injectors (or maybe it is OBD2 clips that don't fit OBD1 injectors) Either way, try it and if they don't fit then install your obd1 injectors into the obd2 intake manifold.
The IAT sensor on the obd2 motor is located on the intake tube, right before the throttle body. On OBD1 motor, it's on the lower back of the cyl 2 intake runner. Easiest thing to do is to extend the wiring to reach the obd2 IAT sensor. Another option is to replace the intake manifold on the obd2 motor with the OBD1 intake manifold. (do it while it is out of the car - much easier)
This way you'll have everything on the intake manifold converted to OBD1 in one shot.
Same with the alternator - put obd1 on the obd2 motor. That way you won't have to cut the square plug from your OBD2 harness and solder it to your OBD1 harness to fit the obd2 alternator.
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My 1992 SOHC Turbo HatchMy Youtube Channel: 6th Gear Garage