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tommyleea · 07-04-2018, 09:42 AM

No fire at the plug. Cool it down to 180 and she fires up immediately and runs great. Our trouble shooting has included checking the coils, condensers and the connections, temporary jump wire from the positive post on the battery to the positive side of the coil, still no start. ( cranks, but no start ) Each time that we duplicate this failure mode ( 200 degree temp) we bring it back down to 180 and she starts.! We are running out of ideas and would appreciate any and all suggestions as to where we go from here. We are excited and anxious to put some road miles on this New Engine in the the 40' Coupe, but right now, afraid to leave Home .[/QUOTE]

When you jump the wire to the coil are you getting spark then, and no start, or no spark and no start? If no spark kinda of seems like coil, but they are hard to test when it is a heat related problem. Do you have power to everything else when this happens? I am not familiar with the ignition set up as far as having two coils, but I assume that is a normal set up. Is there some sort of safety switch/device that would activate at the 200 mark? Maybe something that you didn't know was there? I don't know how stock your rig is.

07-04-2018, 09:42 AM	#9
tommyleea Senior Member Join Date: Jul 2016 Location: Missouri Posts: 458	Re: Engine won't start when it's Hot. No fire at the plug. Cool it down to 180 and she fires up immediately and runs great. Our trouble shooting has included checking the coils, condensers and the connections, temporary jump wire from the positive post on the battery to the positive side of the coil, still no start. ( cranks, but no start ) Each time that we duplicate this failure mode ( 200 degree temp) we bring it back down to 180 and she starts.! We are running out of ideas and would appreciate any and all suggestions as to where we go from here. We are excited and anxious to put some road miles on this New Engine in the the 40' Coupe, but right now, afraid to leave Home .[/QUOTE] When you jump the wire to the coil are you getting spark then, and no start, or no spark and no start? If no spark kinda of seems like coil, but they are hard to test when it is a heat related problem. Do you have power to everything else when this happens? I am not familiar with the ignition set up as far as having two coils, but I assume that is a normal set up. Is there some sort of safety switch/device that would activate at the 200 mark? Maybe something that you didn't know was there? I don't know how stock your rig is.