thundernoodle

I recently swapped a 99' GSR engine into my 90 civic. I runs fine but when I hit VTEC it has no power. I can hear the engagement but it stops accelerating. The ecu is a Phearable p28, rywire harness. The green plug isnt plugged in on the vtec solenoid but the grey one is. There are no CEL's and the clutchis good. Any ideas?

sirtef9

iTrader: (4)

That's the pressure switch you have disconnected. I would check the mechanical timing first.

thundernoodle

Okay. Would it feel ok at low rpm though if the timing was off. It pulls right up to the engagement point then falls on its face

Blue Bulet

u have to have the pressure switch and vtec solenoid wired right for vtec to engage how about just plug the green wire in.

thundernoodle

there is no plug for it on the harness

speedjunkie_g35

Thats your problem, your not hitting vtec until you wire that up.

Eg.ls.turbo

^^^^agreed.Run wire to ur ecu directly to the pressure switch

thundernoodle

Is there any way to bypass the switch?

Davi_Vtec

works fine for me ......

but if you don`t have any check engine lights you don`t need this bypass trick...
or you already have it done.