I found a great deal on a 89 crx si with front end damage for $300 and need help converting the engine over to my 90 HF
Does anyone have any info on how to convert a CRX 91 HF to 89 SI
I've done my research and only found a walkthrough in resource.crx.org. Awhile back I ran into a website that show mini me, dpfi to mpfi and hf to si, but can't find that site any longer......
I thought it was a plug and play, but I'm running into some issue.

 

take the HF motor out, then put the Si motor in. then change the ECU...

 

and after that ignor the 5000 rpm redline and go up to 6500 and use the si manifold and cat setup to much better then the hf take the disk brakes to and the seats

 

the HF to SI conversion was successfull, but i have 2 issue.....
1. O2 sensor code (which I think I resolve it already)
with a new O2 sensor...
2. idling issue....
I try closing the throttle body all the way, but it's still doing the same thing
It's idling @ 2-25k rpm and it won't drop....

any suggestion on what could have cause issue #2 and to resolve it..........thanks in advance


note: I had some issue starting the vehicle with the si wiring harness, so I had to use the HF wiring harness. I'm using both the si ecu and map sensor that came with the car.

 

did you install your TPS right??

 

Gasket on the throttle body is most likely shot. Try some hondabond should sell it all up.

 

thanks guys......i got it fix already