I've noticed some threads referring to fixing some idle issues with tuning devices by pulling the IACV plug off, then turning the engine off, and connecting and turning the engine back on....

My car just shuts off after a couple seconds after I pull the plug off the IACV. Is this normal or should the car stay on?

... maybe I'm reading too much into the wording? (pull plug off, THEN turn engine off)

 

With the IACV plug disconnected, the car won't turn on, it dies right away. Clogged IACV problem?

 

if the car is OBD0, it will more than likely die and throw a check engine code. you can insert a 10w 10ohm resistor into the plug to bypass it

 

I cleaned my IACV yesterday and it still idles a bit rough once in a while, but it does seem somewhat better...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Takumi Fujiwara &raquo;</TD></TR><TR><TD CLASS="quote">My car just shuts off after a couple seconds after I pull the plug off the IACV. Is this normal or should the car stay on?

... maybe I'm reading too much into the wording? (pull plug off, THEN turn engine off)</TD></TR></TABLE>They're probably talking about setting base idle speed. When you unplug the IACV the engine will almost stall, or maybe it will stall. Especially if base idle is not correct, it WILL stall. Usually, it goes something like this...

Engine warmed up completely.
All loads turned off (electrical loads & AC).
Unplug IACV, use throttle to keep engine running.
Slowly, gently, close throttle.
Adjust idle screw (in throttle body) for 450 to 500 rpm.
Shut off engine, reset ECU, plug IACV back in.
Start engine without touching throttle.
Let it idle xx?? minutes without touching throttle (ECU 'learns' idle behavior).

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JimBlake &raquo;</TD></TR><TR><TD CLASS="quote">They're probably talking about setting base idle speed. When you unplug the IACV the engine will almost stall, or maybe it will stall. Especially if base idle is not correct, it WILL stall. Usually, it goes something like this...

Engine warmed up completely.
All loads turned off (electrical loads & AC).
Unplug IACV, use throttle to keep engine running.
Slowly, gently, close throttle.
Adjust idle screw (in throttle body) for 450 to 500 rpm.
Shut off engine, reset ECU, plug IACV back in.
Start engine without touching throttle.
Let it idle xx?? minutes without touching throttle (ECU 'learns' idle behavior).
</TD></TR></TABLE>

u forgot about using a jumper wire on the 2pin connector under the passenger side dash to keep the ecu from making adjustments

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jdm420da6 &raquo;</TD></TR><TR><TD CLASS="quote">u forgot about using a jumper wire on the 2pin connector under the passenger side dash to keep the ecu from making adjustments</TD></TR></TABLE>

He didn't forget because it's not something you do in first place, not according to my 96-00 Civic Helms FSM anyway.

 

I read on another thread that if you unplug the iacv plug while the car is running, if the car dies out, the iacv is functioning correctly.... therefore if it doesn't do anything, there is a problem with your iacv.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EE_Chris &raquo;</TD></TR><TR><TD CLASS="quote">

He didn't forget because it's not something you do in first place, not according to my 96-00 Civic Helms FSM anyway.</TD></TR></TABLE>

i guess its just obd0 cars i guess

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EE_Chris &raquo;</TD></TR><TR><TD CLASS="quote">

He didn't forget because it's not something you do in first place, not according to my 96-00 Civic Helms FSM anyway.</TD></TR></TABLE>

i guess its just obd0 cars i guess

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jdm420da6 &raquo;</TD></TR><TR><TD CLASS="quote">u forgot about using a jumper wire on the 2pin connector under the passenger side dash to keep the ecu from making adjustments</TD></TR></TABLE>Yeah, you should always check for little procedure differences for different years & models. I guess I should have said that. But Takumi still hasn't said what car/engine he has.

 

ooops, it's OBDI