my girlfriend just crashed her 87 crx si i have a 91 dx hb and i am swapping the intake maniold with one from a 91 si. i still need a throttle position sensor which i can't seem to find. can i take her throttle body off her car and put it on my 91 si hb manifold that way i can splice her throttle position sensor into my wiring.

 

I had a 1st gen rex si and I believe your dx throttle body is to small but if it bolts up try it the worst thing that will happen is it won't fit.

 

you can probably use the TPS sensor off of her TB.

 

I really doubt it. The 85-87 CRX Si and 86-87 Civic Si used a throttle body that has a strange bolt pattern, and a plastic spacer. If it does fit, I would be very suprised.

Edit:
This is what I'm talking about, this is from my Si.

 

your MAP sensor isn't conected!
edit: n/m, looks like that vac hose goes to a tee that point sdown on the other side...h:

 

You had me worried there for a minute! The MAP better be connected, I just replaced it's vac line, but you can only see a wee bit in that pic A disconnected MAP would still be the least of this thing's problems, though

 

so is the tps different?

i know d and b series from 92+ use the same tps.