I just finished swapping my JDM b16 into my 91 crx SI. I did everything myself along with a few friends and did everything right. I already ran the wires, tap the vtec to the ecu, mounts, etc. The car starts fine with good adle and everything. There's no check engine light what so ever. The problem is that when the car is revved(probably around 3500RPM), the car suddenly makes a noise around the intake or manifold area. The noise is like some AIR noise and then after that, my rpm will dropped all the way down. I will try to revved it up again but wouldn't work..i will need to let my foot off the gas pedal and then step on it again, but the problem will reoccur. There's is no check engine light also that's why the problem is hard to solve. So basically, i can't drive the car to any shop for them to diagnoise it and it's in my garage right now. Any ideas of what could be the problem? Any suggestions will help..Thanks a lot.

 

have you tried to see if you have a vaccum leak on the intake somewhere? try and spray some carb cleaner or water around the intake mani. and see if the car idles up. maybe like a hose is busted or disconnected? idk i'm just throwing ideas out there.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by lsveg &raquo;</TD></TR><TR><TD CLASS="quote">have you tried to see if you have a vaccum leak on the intake somewhere? try and spray some carb cleaner or water around the intake mani. and see if the car idles up. maybe like a hose is busted or disconnected? idk i'm just throwing ideas out there.</TD></TR></TABLE>

use the carb cleaner, not the water. Just in case you find yourself with a leak, you want something combustible to go into the intake runner rather than water which might give you yet another problem.

 

check the fuel pressure regulator and the iacv.

 

Do you guys think it has anything to do with the FUEL?

 

If it happens around the same rpm every time, then check to make sure your oxygen sensor wires are not switched.