mr240man
New member
- Joined
- May 10, 2017
- Location
- Chapel Hill, NC
Over the past few weeks I've been trying to solve my high idle problem on my '83 LH 1.0 B21F with the white cap chrysler dist. It recently lost spark after I took the impulse sender out and checked the resistances. Went through the greenbook diagnostics and found no issues with my harnesses, ICU, or coil. Turns out I had manhandled the impulse sender and so I replaced it with a NOS unit off fleabay. For the heck of it, I took the timing covers off and put the #1 piston at TDC on the compression stroke with intermediate shaft, crank, and cam pulley at their respective marks. Turns out the previous owner/mechanic had set the distributor 180 deg. off where the rotor pointed to #4 at TDC on cylinder 1...ahhh so that's why my firing order was wrong and the spark plug wires were stretched to reach their plugs. I'm surprised it ran well 180 degrees out like this besides the high idle.
Took the distributor out and looked for the notch where the rotor lines up with (didn't see one). So I went ahead and installed the distro where the gears mesh up and the rotor shaft allows the rotor to point to the thermostat housing at #1 TDC compression stroke. Fired right up and lo and behold idles at the correct RPM---however the distributor is turned all of the way advanced and only shows 5 degrees of timing at base idle. Reving the motor advances the timing per the ICU like it should, but I'm wondering why full advance is only 5 degrees at base idle? Guess I could take a rasp and file the adjustment slot for a few more degrees if I have to.
Took the distributor out and looked for the notch where the rotor lines up with (didn't see one). So I went ahead and installed the distro where the gears mesh up and the rotor shaft allows the rotor to point to the thermostat housing at #1 TDC compression stroke. Fired right up and lo and behold idles at the correct RPM---however the distributor is turned all of the way advanced and only shows 5 degrees of timing at base idle. Reving the motor advances the timing per the ICU like it should, but I'm wondering why full advance is only 5 degrees at base idle? Guess I could take a rasp and file the adjustment slot for a few more degrees if I have to.
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