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Troubles while traveling

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nc43bsa:
My Mille had a failing coil that would run normally until the coil got hot (about 20 miles.)  Then it would drop the cylinder at idle, picking back up above 1500 rpm.  As the situation got worse, the rpm when it would pick up the cylinder went up to 2000, sometimes higher.  Even then, it ran fine at cruising speed.  I got stuck in stop-and-go traffic once and had to pull off the road to let it cool off because it was running on one cylinder so much.  Naturally, when I was attempting to diagnose the problem, it cooled off to the point where it didn't misfire. 

While it was hot, I determined which side it was by pulling one of the wires off the spark plug, then swapping coils side-to-side to verify the problem also switched sides.  Fortunately, I had an OEM coil in a box of parts I picked up at the Daytona Vintage Swap Meet many years ago.

bmc5733946:
Well with a new battery in the DVOM, I found an open plug cap and one with high resistance! Checked the ones from my top secret stash and both were good so on they went. Tomorrow tells the tale!

Thanks for the suggestions!

Brian

Kiwi_Roy:

--- Quote from: bmc5733946 on May 19, 2022, 11:12:22 PM ---Well with a new battery in the DVOM, I found an open plug cap and one with high resistance! Checked the ones from my top secret stash and both were good so on they went. Tomorrow tells the tale!

Thanks for the suggestions!

Brian

--- End quote ---
Do you have copper wire leads or the nasty carbon core resistor wire?
The resistor wire on my EV had burnt back about 1/2 inch so I shortened it back until it made contact but replaced it with copper at the first opportunity,
Do not change condensers unless you have some originals, the ones from the orient are questionable, BTDT
Did you make it to the rally?

chuck peterson:
Points gap..gazing at a crystal ball from 2000 miles away

Good luck!

My 2nd WAG is a coil working at cooler temps, overheating and not working after warm up…any cracks around the leads?

guzzisteve:
Stay dry, front coming across there this AM.  I had an issue w/Cal2 would cut out every time I went over 60mph, slow down it'd come back on. It was the float needle shutting off the fuel. Worn pin let's it extend. Put in next size larger fixes it.

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