Neighbours 02. Idle is very unstable. All diagrams show iacv toward front of plenum close to throttle body. I got no wires anywhere around there. Possibly toward rear on drivers side. Resembles parts I see. Looks like tough access.

Should be right on top next to the brake booster.

I'm curios why there is an idle speed adjustment screw. Haven't seen one of those since 85. The placard under the hood states idle speed is not adjustable.
Also under the TB is a heat activated solenoid which appears to control idle speed. It has adjustment screw also but no wiring to ecm. .

I'm curios why there is an idle speed adjustment screw. Haven't seen one of those since 85. The placard under the hood states idle speed is not adjustable.
Also under the TB is a heat activated solenoid which appears to control idle speed. It has adjustment screw also but no wiring to ecm. .

Charleytuna wrote: ↑

Tue May 18, 2021 5:23 am

I'm curios why there is an idle speed adjustment screw. Haven't seen one of those since 85. The placard under the hood states idle speed is not adjustable.
Also under the TB is a heat activated solenoid which appears to control idle speed. It has adjustment screw also but no wiring to ecm.

The VG33 Frontiers (up to '04 I think) were just about the last vehicles on earth with an idle speed screw. With Nissan the trucks are almost always the last vehicles to get new technology, that's just the way it is.

The FICD Solenoid you're talking about functions only with the A/C, to increase idle speed when the compressor is on. The AAC is temperature controlled and handles increased idle speed when cold, the solenoid isn't used for that.

Thanks. That explains a lot.

Got her fixed. Was trying to fix idle problem that popped up after changing dist. First I'm a gomer. Next changed plugs And wires, no help. Bought a timing light . Had no idea spark could be retarded that far and still run. Dist. One tooth out in retard direction plus adjustment. Sure glad I didn't take plenum top off looking for non exsistant IAC problem.

Cheers Chuck in Texas

Glad to hear you got it straightened out!