[mick]

When I shift into neutral and push the brake pedal....my idle dives down to 500 rpm. It then comes back to normal when I stop the car. Is this the IAA or crank angle sensor?
The service manual says check the IAA and the FICD Solenoid. What is FICD and where is it?
When I unplug the IAA the idle drops---is that how you test it?

 

[mick]

Idle drops on braking

If you unplug the IAA and the idle speed drops, that indicates that there's dirt in the IAA assembly. The IAA I unplugged said AAC on it

Can I clean it or must it be replaced?

I'm wondering about the fuel pressure. The idle drops while braking which pushes the gas in the tank forward. It only happens when stopping for red lights. What fixes are available to maintain steady fuel pressure?

Is there any possibility the ECU could cause this?

Thanx for you help.

IAA consists of the IACV-FICD, IACV-AAC and the IACV-air regulator.

There are other things that could cause the idle drop:
- dirty fuel injectors
- dirty spark plugs
- low fuel pressure
- bad O2 sensor

 

[mick]

Yes I recently changed the fuel filter. Also I overoiled the K&N air filter and found it all over the MAF. I'll be cleaning that out next.
My FICD is putting out 1400rpm when the A.C. is on.
Where is the IACV? What is it?

 

[mick]

IACV

Is the IACV near the IAA?

 

[mick]

OK.......I found out.......the IAA and IACV are all together with the FICD. My A.C. pushes the idle up 400 rpm.............Would it just be the F.I.C.D.?