4th Gen IACV cleaning

[Beancooker]

How to clean IAC valve

You will need; 10 and 12 mm sockets 3 inch socket extension Swivel socketRatchet Philip's screwdriver rag throttle body cleaner

1. Unplug the 4 connectors from the IAC assembly. Undo the hose that connects the IAC to the intake assembly.

2. There is a metal bracket that is blocking one of the IAC mounting bolts. Using a 10mm socket, remove the bolt that holds the metal bracket.

3. Remove the 3 mounting bolts using the 12mm socket. The lowest bolt may require the swivel socket.

4. Pull out your IAC valve and clean it w/throttle body cleaner, rag, and old toothbrush.

Now reverse steps 1-4.

How to adjust IACV -

1. Warm the engine up to operating temp.

2. Turn off the engine.

3. Disconnect the TPS.

4. Start the engine and adjust the idle speed using the stop screw on the throttle body to 650 RPM's.

5. Turn off the engine.

6. Reconnect the TPS and restart the engine.

If the IACV is working correctly your idle should be correct. If it's a bit low, try adjusting the screw on the IACV bypass to get your idle speed to 700 RPM’s in neutral with no load.

[nitink]

Long back I read on maxima.org that once you clean IACV, you can spary little carb cleaner in IACV pipe monthly to keep it clean.

[jltibbs]

Long back I read on maxima.org that once you clean IACV, you can spary little carb cleaner in IACV pipe monthly to keep it clean.

good piece of info nitink. i would recommend using valvoline synpower throttle body, carb, and choke cleaner. any other suggestions?

[freakyjason]

good write-up! thats just what i needed!