calgone47

Just swapped in a b16 into my crx. Everything works except for one thing. Vtec rarely kicks in and when it does it fades out and sometimes kicks back in. I've been told it may be a wiring issue, a bad ecu, or my speedo cable tranny connection. I've completely gone over the wiring over and over and it seems fine to me, grounds and everything. Bad ecu may explain it but i doubt its bad. Now the last possibility would be the speedo cable. That was really the biggest problem when i did the swap. My factory cable wouldnt fit in the new tranny because it came with an electrical unit. So we took the housing off the electrical one and put the mech. unit and elec. unit together. The speedo works fine now and never cuts out, but the cable is in there pretty loose.

I don't know about you guys but it's really frustrating. If I don't figure this out soon then I'll probably take it to tuners edge. But if anyone has any other idea's I'd appreciate it.

Cpt. Non-Spell

a lot of people say they run into something like that with the hf harness.... what they do is cut one of the revirse wire and it fixes it.... don't as me but it suppose to work..... i might be think of something else..... thats just what i have herd....

calgone47

i used my Si harness, i dunno ive never heard that

4g6?

take it to tuners edge the guys there kick much ass gene can help u

calgone47

helllpppppppp im too broke to take it anywhere right now

Fabrik8

Speedo cable shouldn't matter, the ECU doesn't care about speed, just engine RPM, throttle position, etc. Look elsewhere for your problem. Make sure you have good grounds for everything, because the VTEC solenoid takes a bit of current to engage, and a bad ground may not allow this. Also, make sure any VTEC wiring you've added is big enough, probably 20 guage or bigger should be fine. Check all other swap wiring too, any signal that the ECU looks at for VTEC should be checked and double checked at any solder joints, etc. Of course, the solenoid could be messed up also, but I doubt it.

Oh yeah, oil pressure. Have to have that for VTEC engagement. Look there too.

calgone47

ill just check ecu grounds tomorrow i suppose :/

MA-HALF-E

Are you throwing any codes?

calgone47

nope, none

calgone47

im told it may be the oil pump and that actually makes the most sense to me so far, oh well, thats gonna be a bitch