GreensleeperB16

JDM B16a
DOHC Del sol IM ECU and electronic goodies

however.. i have the typical erratic honda idle
850-1500rpms

I replaced the iac valve....

however the port for the IAC valve at idle still has a vacuum on it.?????

could the new IAC valve not be working also?

what kind of voltage reading should i get for this valve
Iam at a loss for what to do..... i have adjusted the tps and it reads .5v at idle
the tb has been cleaned.... and i also put a new TB gasket in..

anyone have any suggestions

thanks a bunch

bryan

Shawn C

iTrader: (1)

of course it has vacuum, it's a hole in the intake manifold? i might recommend checking for another vacuum leak, possibly a hose, the IM gasket, or around another sensor on the IM.

Relic1

why did you replace the IAC in the first place? was it bad? (code?)
to test it take it off and place 12 volts across the two pins. the plunger should move all the way to one side, remove 12 volts and it should drop to the other side.

by the way, one side of the IAC should have vacuum on it at adle.

erratic idle can be lots of things.
what else have you tried?

GreensleeperB16

I was told by a few others that was my problem.... They said that at idle on the two ports that the one leading to the IAC when u put ur finger over it there should not be a vacuum. If there was, then i need to replace the IAC.. i have bleed the cooling system, replaced the TB gasket and adjusted to the TPS to spec. what else could it be?

O2?

thanks

GreensleeperB16

also
when u put ur finger over the port the engine quites and idles fine..... you can definitely hear a vacuum leak

GreensleeperB16

im in dire need of fixing this issue... i have driven the car like this for almost 1.5yrs.... i think its making me insane!

any one?

thanks
bryan

B_CRUZ!

buy a lot of carb cleaner. start the motor and spray the cleaner near hoses, gasket areas and sensors. if the idle fluctuates when you spray, then thats where your leak is.

xhatchracerx

ive had the same problem for around 1.5 yrs as well, haha. but seriously though that stupid idle thing is no joke, good luck man