idle and hunting
02-24-2002, 11:59 PM
#1
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Join Date: Aug 2001
Location: Newman, California
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idle and hunting
Recent problems with idling and hunting.
Idle will occasionally vary from 800-1100 rpm down to 600 with a slight miss. I have had to adjust the air screw to bring up idle. Then occassionally it will be to high.
Most recent changes.
1. Cat Bypass, with original ox sensor. No difference in performance or idle with/or without the sensor connected.
2. New Fuel accumulator and filter.
3. Plugs, plug wires
4. Timing
5. Fuel distributor adjustment
Idled fine for about 500 miles
What is the most likely cause?
1. Warm up regulator?
2. Cold start valve?
3. Aux air valve?
Other than annoying idle, the vehicle runs very strong
Idle will occasionally vary from 800-1100 rpm down to 600 with a slight miss. I have had to adjust the air screw to bring up idle. Then occassionally it will be to high.
Most recent changes.
1. Cat Bypass, with original ox sensor. No difference in performance or idle with/or without the sensor connected.
2. New Fuel accumulator and filter.
3. Plugs, plug wires
4. Timing
5. Fuel distributor adjustment
Idled fine for about 500 miles
What is the most likely cause?
1. Warm up regulator?
2. Cold start valve?
3. Aux air valve?
Other than annoying idle, the vehicle runs very strong
02-25-2002, 12:43 AM
#2
Engine hot or cold when hunting occurs? Frequency of hunting? If it's when engine is cold and frequency is 1 or 2 seconds, search and read my previous posts. It's probably your AAV. After twenty years there shouldn't be a single SC around with the AAV still connected.