Hey guys, I'd like some help from you integra guys. Doing a LS engine swap into an EF for a friend and he brought me a B18A1. Only problem is I'm not sure which it is. The head is stamped PR4-3 9/1 and such, and also, the intake manifold is stamped PR4 on the back side. Also, the throttle linkage holder thats bolted onto the front side of the manifold is also stamped PR4. Does all this add up to a 91 B18A1 OBD0?? If so, I assume correct that I will need the PR4 ECU to run it. Thanks for any answers.

 

Come on guys, just need a simple answer.

 

a b18a is obd 0

 

I believe thats incorrect because I read somewhere here that the B18A1 came in 90-95 with OBD0 from 90-91 and OBD1 from 92-95. Is this correct?

 

well 92 and up iss obd 1....

 

Well still haven't found the definitive answer I'm looking for. Do I have an OBD0 engine and if so, the correct ECU is the PR4? Thanks for any info.

 

Come on guys.....anyone?

 

Look at the casting date on the head.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dogginator &raquo;</TD></TR><TR><TD CLASS="quote">Look at the casting date on the head.</TD></TR></TABLE>

beat me to it. i think you may have said 91? if so its obd0.

 

Thanks for all the input guys. So far, we've come to the conclusion that it is a 1991' OBD0 1.8L . Here are some pics just to help close the deal.

 

That casting mark certainly looks like 1991.

 

Thanks guys. Really appreciate all the help.