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Discussion Starter · #1 ·
Well, I installed the carb/intake heat shield, but I still have the same problem - severe missing at idle and low throttle settings after warmup. Engine runs fine when cold and up until shortly after reaching operating temperature.

Now, I realize that when this happens, it isn't firing on cylinders 3 & 4. I checked and there's no spark to either of those cylinders. However, while pressing the plug wires back into the distributor cap, I notice that if I push the distributor slightly towards the driver's-side fender (not much pressure), cyls 3 and 4 start firing again. It's the same if I press on the cap or the distributor body.

There doesn't seem to be any play in the shaft. It does look like the alternator bracket is fairly close to the distributor shaft flange, so I'm going to see if loosening or moving that out a bit helps.

Anybody got any ideas?

-Bob
 

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Discussion Starter · #3 ·
Todd,

It happens when I push on the distributor casing as well - not just the cap.

I've also replaced the plug wires and swapped out the coil for a known-good unit, so I know it's not the quality of the spark.

However, when I started to pull the distributor, I realized that the points were barely opening. I just got this car and have not yet done a "real" tune up since the receipts that came with it indicate that one was done less than 2000 miles ago (when the engine was overhauled). So, I never thought of something that simple.

Now I've got to go get a dwell meter. Haven't had one of those in years, but with 5 classics (four of which still have points), it will get a good deal of use.

We'll see how it pans out tomorrow.

-Bob
 
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