i just swapped b16a2 into a 93 cx everything runs fine but my idle is speratic. im not throwing any codes and when the car gets to operating temp it stops. I tryed 2 differnt iac and still the same thing and 2 differnt ecus as well. And if this is any help i tryed p28 and cx ecu and both are for sohc, my other p28 was fryed when i got it

im running a type r maifold and type r iac the plugs work fine on my harness

 

my b16a does the same, only it always does it. it revs to 3000 then back down. the only code im throwing is 02 sensor but ive been throwing that forever lol. you can try taking the IACV apart and cleaning it with carb cleaner it may be stuck. i havent gotten around to cleaning mine.

 

i tryed 2 differnt iac and still does the same thing

 

i dunno what it could be. my car ran fine then all of the sudden it started to idle all crazy. people keep think im revving at them at lights. pretty embarrasing

 

Check for vacuum leaks and make sure your idle adjustment screw is not out of adjustment.

 

Try your computer I had the same problem on a car it would not go away I pluged a another p28 and this problem went away.

 

it's wierd that you'd still be able to run w/ a p28 and a cx ecu for sohc, that shouldn't be.... i suggest cleaning out the iac.... or else use the search button

 

no vacum leaks at all iac is very clean but i did find some bubbles in the radiator lines i will see if that works

but i will try a new p28 chipped for b16a some this week i allready used the search

 

I have a spare p28 AUTO eco that im gonna ship out tomorrow, but if i were to plug it in would the car start? just to see if it is the computer.

 

realy i dont no

 

you think it could be the ecu that i am running

usdm p28 chipped and or cx all sohc i tryed both still nothen

 

well i use a JDM Pr3 and it does what your car does.

 

to clear it up for me, in the open loop mode it surges and in closed loop it doesnt?

 

u are correct

 

if your talking about the iac valve under the TB theres two thing you can do
#1 you can bypass it
or
#2 take off the valve and take off the two 8mm screws and there will be
a white part with two notches and a balbearing type thing in the center
take two flat head screw drivers or needle nose pillars and tighten it down all the way.
those two things will fix the idle jumping

 

its no under the throttle body it is allong the back of the intake manifold

 

Im right there with you dude
https://honda-tech.com/zerothread?id=714346
i already bypassed the one under the throttle body and replaced the big one on the back 3 times, and got a new harness, and used diff ecus i dont knwo dude im about to just quit and buy a new motor.
What you can do for a temp fix is unplug it but at 1400 while slowly giving it gas it tried to surge. You will get it when u unplug it and slowly give it gas.

 

then im gonna say its a vac leak also if it was the one on the back of the intakeit would throw code 14 and sometimes it wont. so do this drive over
60 mph for 20 miles and see if it throws that code. do this after you reset your ecu

 

 

I put a b16b in my 97 hatch and right off the bat it would not stay on without me holding down the gas pedal a little to keep the idle up. Once it warmed up it would idle fine. Then sometimes when I am driving and stop a light it starts to idle crazy. I messed with the screw on the TB and also checked for VAC leaks. I don't know what else it could be. I also running a p28 that has been chipped. Any ideas.........

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ghettochild &raquo;</TD></TR><TR><TD CLASS="quote">then im gonna say its a vac leak also if it was the one on the back of the intakeit would throw code 14 and sometimes it wont. so do this drive over
60 mph for 20 miles and see if it throws that code. do this after you reset your ecu</TD></TR></TABLE>
Mine is throwing the code. And has been throw countless drives to tally and ecy resets.

 

bumpity

 

cuckoo

 

found out the problem very simple i had the evap purge sensor plug switched with the iac plug it pissed my off so bad that it was something so minor but i got the problem fixed

 

TPS, Map Sensor, IAC, Vacumm leaks, and Bleed your coolant lines and **** to?