Ok my friend is swapping a 1990 b18a into his 93 hatch...We used obd1 injectors, dizzy, ecu, and 93 civic wiring harness... We have everything covered to switch from obd0 to obd1. There are three sensors on the back of the block. One of them plugged up but the other 2 i have no clue what to do with or what they are...On the dx engine there is a plug on the thermostat housing and there isnt one on the b18a, what do we do about that? Please respond ASAP!!!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LudeSH &raquo;</TD></TR><TR><TD CLASS="quote">On the dx engine there is a plug on the thermostat housing and there isnt one on the b18a, what do we do about that?</TD></TR></TABLE>

That is the coolant temp switch which is now on the back of the block for the B18A. The sensor that has 2 male connectors coming out, that is the coolant temp for the B18A. You will need to extend the wiring on the DX harness down to there and use 2 female connectors so it plugs up.

 

Thanks for the reply! Ok there is another sensor back there that has a green plug which is the secondary water temp sensor...Does the obd1 pr4 look for that because i know the b18b does not have that sensor?