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Maintenance / Re: At a loss - engine stalls under load
« on: November 04, 2022, 11:18:21 PM »
One more update....periodic stalling problem under moderate to heavy load continued. Took it to a chassis dyno so we could troubleshoot under load. Dyno guy has been tuning engines and using a dyno for over 20 years - after 3 hours he's scratching his head. Because the stalling was so immediate (like turning the key off), he decided to temporarily install an MSD distributor and MSD box to effectively bypassed my entire ignition system. Viola! problem disappeared. Made another jet adjustment and some other tweaks and the car has "woken up" pulling well to 5,500 rpm.
So the problem is on the inbound side of my coil. Ultimately found a melted wire that goes to the positive side of the coil. I'm not sure I understand why that condition caused the symptoms to be what they were as a melted wire is melted at both low and heavy throttle. What I do know is when we took it out of the circuit, the problem went with it!
So the problem is on the inbound side of my coil. Ultimately found a melted wire that goes to the positive side of the coil. I'm not sure I understand why that condition caused the symptoms to be what they were as a melted wire is melted at both low and heavy throttle. What I do know is when we took it out of the circuit, the problem went with it!