Hack
15 Year Member
Here's an 'out of the box' suggestion.
Drain your gas tank and get new gas and see if the problem goes away. Bad gas - just a thought.
Your fuel is hot and is boiling away, hence your empty filter and 3 psi at idle.
So, whenever you want to replace something, ask yourself "What does this have to do with my fuel getting hot enough to boil away?" Would a bad carb boil your hot fuel away before it's even reached the carb? A coil? Ignition box? Intake gasket? High/low float levels? Give me a break.
What will shooting gas into a can prove to you? Your car already runs so that test is pointless. Your empty clear filter is already telling you there is no gas when it is hot. Your pump can shoot fuel into an empty can at .5 PSI, so what does that tell you? Nothing.
Answer these before you go on:
Does your fan blow hot radiator air directly on the fuel line?
HAve you tried watering down the fuel line when it is at 3PSI to see if it creeps back up?
Are you trying to ignore the very high possibility that it is a simple vapor lock problem that can be fixed for just about free?
The clothespin myth needs to die. Explain how wood dissipates heat. Even if you clamped some heat-dissipating material around the line, all that would happen is the hot air surrounding the line would be absorbed into the fuel, making things worse. You're assuming the fuel begins at a higher temp than ambient - it isn't. The heat needs to be blocked from reaching it, not dissipated out. If the fuel temp is indeed higher than ambient then that's the problem that needs to be fixed.
Any "fix" that clothespins might have done (besides pure coincidence) was most likely due to the pins creating air turbulence around the line but again that won't help if the air blowing on the line is coming right from the radiator fan's outlet.
I saw you have both a pusher and a mechanical fan. What mechanical fan do you have on there?I did take it to a local tune shop and they took a look at it and then gave up after the temps kept climbing even with their shop fan.