since i already have done the mpfi conversion to my harness, im going to keep that. then i need to add vtec control (4 wires). so i keep the old ecu or i use the ecu that came with the motor? and if i switch will the wiring i already did still function? or do the pins change?.. sorry if i seem redundant,,. electrical involving more than a speaker becomes quite a chalenge when you cant tell one wire from the one next to it. i had to have my daughter point out the correct wires for me.. (no, im not stupid, i am colorblind)

 

What ecus do you have?

 

the stocker in my '88, also from the '91 si, and the one that came with the vtec engine (37820-pr3-j00)
hows that acceleration problem? did ya fix it?

 

No, my car sucks. Its still pretty quick though lol.






id toss in the VTEC ECU. If it runs like crappo ya can swap it with the other one.

 

no, thats too simple. im sure theres a harder way!! haha
(did you try puttiong a little slack in your throttle cable, between the tensioner and the throttle itself? hondas seem to get confused if they dont have a little slack..

 

yea, i tried everything. Im having the timing belt replaced soon, and timing RE-SET. If its not taht.......then IDFK

 

good luck with it!

 

your stock ecu wont run the VTEC, so you have to use the one that came with the motor. you might have to run a couple more wires for vtec and maybe a knock sensor, but its not too bad. you can find the diagrams on google.

 

listen to sacs hes the man

 

always have