Originally Posted by kubcat
I had a problem with my tow truck where sometimes after a nice long drive it wouldn't start as it would crank too slowly. If I kept cranking, the battery would go completely flat very quickly. If I left it long enough without first flattening it completely, it would start fine.
The voltage read fine whenever I tested it. I replaced lots of wiring, connectors, battery leads etc with little change. Out of frustration I purchased a new battery when I couldn't start after refueling.
This new battery cured all my starting problems. When I discussed this with an engineer friend of mine, he did a load test on the old battery after a recharge and it turned out it was past it's use by date, even though a straight voltage test indicated it was fine.
Once had the same problem, mine would turn-over but not start after refueling or shutting-off for a brief period 2-10 min or more on warmer days.
It was a No Spark condition. After a series of tests (batt voltage fine), etc.. and months of changing-out almost all electrical primary/secondary items and going through two starters, the only thing left to change was the magnetic pick-up inside the distributor. Boom--away it went and never had another hot start problem.