I’m with Carl.
There are hundreds of trucks represented on this board with a metal fuel line routed in more or less the factory manner. Some might have a short section of rubber making a connection to carb and/or fuel filter. But other than that, many trucks with nearly identical pump-to-carb fuel line routing. Detroit is certainly far from the hottest climate these trucks are driven in. If there were a pervasive design issue for which insulating lines was the cure, nearly all of us would be doing it.
I’m not convinced that spark is the issue, but Carl is correct that it’s the first and easiest thing to test. If you have spark in one of these no start situations, there are several other fuel system tests that could be done first.
Last edited by JW51; 07/18/2023 1:21 PM.
