greensi00

delete

speedooo

You need to convert your iacv wiring...all d16y7 and all auto d16y8's are 3 wire

greensi00

i cut the auto iacv plug off and changed the plug to two sensor and the orange wire is hanging out

boost and bass

i have this problem to I have a d15b but im using a y8 manifold and it surges all the time when warmed up im using a y7 harness and have tried many things someone please help me too

Danja

Throttle adjustment issue? I know on some cars the ECU will pull back if it thinks the throttle is closed (sensor position) but the engine is running too fast (getting too much air), which causes repetitive surging as the cycle occurs repeatedly.

boost and bass

ok that makes some sense if it matters my engine is idleing up not down as in it goes from about 1100-1400 and what about the iacv wire i think it was converted to a 2 wire to fit the d15b manifold, alos just to throw in there i have a b18 60mm throttle body

Danja

I know essentially nothing about honda specific wiring (just picked one up myself) so I can't help you there or with the throttle body. If what I said were going on, the ECU would be pulling fuel at 1400 RPM to slow the engine down and it would repeatedly speed back up once it dropped below the threshold. I'm not sure if it works this way, but I know for a fact this can happen on some cars.

z6hatchboy

Ok, if the wiring is right, then: if it only does it on warm up its the fitv, if all the time then iacv, clean/replace them. For the y8 manifold person, make sure your intake mani and tb gaskets are all good. Also, with later year y8 mani's they had air holes in them (maybe around the runners) but those need to be plugged.

speedooo

Let me repeat myself, you need a civic ex engine harness or you need to repin the harness at the ecu. the y7 harness is made for a 3wire iacv

FearTheH

iTrader: (5)

X2! or X3 since you said it twice...anyways.... do this and report back.

boost and bass

my iacv is converted to a 2wire and the b18 throttle body i have has no fitv and i did clean the iacv very well still no change all the time when fully warmed and with my solid motor mounts and my exaust its really a pain in my behind

speedooo

did you repin it at the ecu or just cut/spliced a 2 wire plug on?

greensi00

on mine i just spliced it in to the 2 wire plug i got a different iac gonna try that but im runnin a ex auto harness three wire but what do u mean repin it by the ecu i hate it its been doing it for along time. at first i had a y8 auto intake manifold not realizing that they had auto and manual iacv but i put a 5spd one on and got the same crap

speedooo

research a little...the manual y8 ecu doesnt have the same pinout as a y7 ecu or an auto y8 ecu.

do this

greensi00

i got my idle screw all the way out so it wont stall out it dont jump anymore unless i give it gas around 1500rpms mad confused also when you go down the road at a constant rpm it will jump

speedooo

greensi00

bout to now you the man if it works

boost and bass

i also put a 2 wire clip on but im using a p28 ecu not y8 and a obd2b-obd1 conversion on my y7 original harness harness so how will this work for my setup?

I also heard that with big injectors its nearly impossible to get a steady idle im running 450's is this a possibility or BS

thanks for all your help

greensi00

good **** had that problem for awhile idles at 900rpms now you the man