Different idle every stoplight
Completely stock down to the emission controls
1983 Jeep CJ5
6 cyl AMC 258 i6 / 4.2l
Carb: NAPA Carter BBD (California edition?) I rebuilt this last week. Made all adjustments per spec. Removed Dashpot, and plugged line.
Milage: Unknown but PO says 113k speedo is correct. As of now, nothing to insinuate otherwise. Has not been driven much in the last 10 years.
Oil pressure: ~60psi cold, 20 warm at 700 rpm idle
Spark plugs: New champion coppers
Timing: -14 ( I'm at 4,000ft) High altitude jumper is connected.
Vacuum pressure: Consistant on gauge. No leaks - verified with starter fluid. Checked all lines by diagram. Replaced warn lines with new.
O2 sensor: new
Symptoms: Always Steady idle. Problem: the idle changes every stoplight. I will set the idle to 750. It idles absolutely fine. Go for a drive, stop at the first stoplight, the idle will be at 1,100. Second stoplight 800. Third stop light 1500. Funny thing, I tap the gas at the stoplight while in nuetral, it goes from 1500 back down to 800.
I have the electric choke, I have disconnected the wires to it. Is there any way the choke can be still affecting the functioning?
Could the stepper motor on the back of the Carter BBD change the idle speed?
Thank you,
Chris
1983 Jeep CJ5
6 cyl AMC 258 i6 / 4.2l
Carb: NAPA Carter BBD (California edition?) I rebuilt this last week. Made all adjustments per spec. Removed Dashpot, and plugged line.
Milage: Unknown but PO says 113k speedo is correct. As of now, nothing to insinuate otherwise. Has not been driven much in the last 10 years.
Oil pressure: ~60psi cold, 20 warm at 700 rpm idle
Spark plugs: New champion coppers
Timing: -14 ( I'm at 4,000ft) High altitude jumper is connected.
Vacuum pressure: Consistant on gauge. No leaks - verified with starter fluid. Checked all lines by diagram. Replaced warn lines with new.
O2 sensor: new
Symptoms: Always Steady idle. Problem: the idle changes every stoplight. I will set the idle to 750. It idles absolutely fine. Go for a drive, stop at the first stoplight, the idle will be at 1,100. Second stoplight 800. Third stop light 1500. Funny thing, I tap the gas at the stoplight while in nuetral, it goes from 1500 back down to 800.
I have the electric choke, I have disconnected the wires to it. Is there any way the choke can be still affecting the functioning?
Could the stepper motor on the back of the Carter BBD change the idle speed?
Thank you,
Chris