Making new plug wires.

CIS mixture adjustment method

Adjusting idle mixture, by Souk, the push/pull method

AAR info

Info on the AAR valve at AAR Revisited

and another AAR related When warm my AAR closes, not sure what the AAV is doing - (look for lots of pics)

And another Bad Auxillary Air Valve?? Says AAV but talks about the AAR and has a photo that points out the location of the various pieces from the back side (toward the front of the car).

CIS more checking info

This post 81 SC died and will turn over & fire but not start has some more info on checking settings, particular failure when warm. With a nice short check list from Lorenfb.


"The AAV is a vacuum-operated valve working in conjunction with the AAR."

All three valves (AAR, AAV, DECEL) provide parallel vacuum sources
bypassing the throttle butterfly:

1. The AAR's function controls fast idle during warmup, i.e. a steady-state
idle affected by engine temp and time.
Problems:
a. Low idle at cold start - valve stuck (closed)
b. High idle at warm engine - valve stuck (open), or no 12 volts
2. The AAV's function provides additional air during starting (zero/low vacuum),
i.e. both cold & warm starting, causing a momentary fast idle.
Problems:
a. High idle - valve stuck (open)
b. No momentary fast idle at startup - valve stuck (closed)
3. The DECL's function is to control the rate of change of RPMs to prevent
idle undershoot and to reduce emissions (HCs) during decel.
Problems:
a. High idle - valve stuck (open)
b. Idle undershoot or engine dies on decel - no small vacuum line, stuck valve (closed)