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sal sal is online now
Sal
 
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Join Date: Jul 2002
Location: Diamond Bar Ca
Posts: 27
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911sc irregular idle solved

Wow, I solved my irregular idle problem. My 1983 911sc would idle high when warm would oscillate and surge when cold. Then sometimes would be right on where it should be. I thought the problem was the fuel system until the ignition distributor started to make noises and the idling got worse. I could detect a pattern the distributor grumblings and a surge in the engine idle. It sounded like something had got loose in the distributor and was binding with something in advance chamber of the distributor. I took the distributor apart and found a spring loose from the mechanical advance weights. I hooked it back up, re-install and the idle problem is gone! It is "ROCK STEADY" idle now! After re-install of distributor I had to adjust the ignition timing, it seems to me the last time it was adjusted it was influence by the particular position if the loose mechanical weight. I summary I think the my idle surges and irregular idle, was caused by timing advance issues-the free floating mechanical advance weight.

The next thing is where can I get the little plastic bushings used for mounting the mechanical advance springs in the distributor? Mine are gone, I ended up pinching the springs hooks to make sure they stay on.

Old 03-02-2007, 09:06 AM
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Join Date: Oct 2000
Location: agoura hills, ca 91301
Posts: 2,634
I don't have the issue, but...

I, for one, thank you for the input.

Old 03-03-2007, 09:49 PM
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