Are the 88-91 crx si engine harnesses the same as 88-91 civic si hatch engine harnesses?....my car is a 89 civic si....also, are they interchangeable amongst themselves (years)?....for example: can i use a 91 civic si engine harness in my 89 civic si ?

Last Question: Does anyone know if i need to do anything to an si engine harness for a B18a1 pr4 to work properly?

 

I am 95% sure they are. Same obd0. With the pr4, just make sure you plug into all the same sensors as the sohc. I think the pr4 has its iacv/idle regulator on the firewall instead of the intake manifold.

 

thx....do u know if i need to modify anything on the stock si harness for the B18a1 to run properly?

 

your going to need to extend your tps and eacv wirs.. thats about it though

i think...

 

slpnz....do u know if the 88-91 crx si engine harnesses the same as 88-91 civic hatch engine harnesses.....i have tried to research it, but no one can give me a deffinant answer to it.

example: will the 89 crx si harness fit in my 89 civic si hatch?

 

They are both civics, they are both the same

 

YES for sure. i believe 89-91 civic si harnesses are the same
-Kyle

 

yeah the harnesses are the same..88 is different from 89-91 though..

 

if im correct....a crx si harness will plug and play in my 89 civic si hatch??

 

89 CRX and Civic Si engine harness have the same part no. - 90-91 CRX and Civic Si have same part no. but part no. is different from 89 - don't know what is different

 

thanks...hey umm...i replied to that message in question with that HF manifold..

hey the part on the left (canister looking thing) is the EGR valve?.....on my b18a1 in my 89 civic si i have the same thing on the manifold...but i dont see anywhere to plug it in at??.....any suggestions???...do i need it?