Ok I am doing a dpfi to mpfi and have run into something weird..it is a 91 crx dx manual transmission and in ecu pin b12 which should be empty there is a wire white w/red stripe and I am not sure if I want to cut it just yet because I have done this on two other cars a 90,and 89 dx civic and crx and did not see this wire on either of them??

This car is completely untouched prior to this and is 91 crx dx with d15 anyone else seen this wire before?

 

ok figured it out some models have crank sensor in b12 already, kinda weird but traced the wire and double checked with my buddy through honda's online tech support for tech's.

 

Ya no biggie, I always see that wire... Still just do the swap the same way