Here in the Arizona heat, it appears I have been running into vapor lock issues. It's not the fuel percolating out of the carburetor, but when I'm driving in 100+ heat, the engine starts surging and bucking like it's running out of fuel. If I back off the accelerator, the engine keeps running, but the speed drops way off as expected. The issue doesn't occur when I drive at night, or once the weather cools down. The other morning I was able to run it at WOT to over 100mph, and no issues.
I've been reading online on ways to combat this....insulate the fuel lines, quit running ethanol (not an option around here, unfortunately), clothes pins for heat sinks, run an electric fuel pump outside the tank to push the fuel, etc.
One article I found was where the owner of a older vehicle ran an inline fuel pump just outside the tank to push the fuel to the mechanical fuel pump on the engine. He had a switch mounted where he could activate the electric fuel pump when needed, i.e., hot weather and vapor lock, and then shut it off when the issue was resolved, or no longer needed. He stated that he had no more problems after that. It wasn't a high pressure, EFI type pump, but ran about 3 - 5 psi just to keep the fuel pushing through the lines to the mechanical pump. Unfortunately, the article was from about 2009.
Are there inline electric fuel pumps that can allow fuel to pass through when the pump is not running? Advice/ideas?
I've been reading online on ways to combat this....insulate the fuel lines, quit running ethanol (not an option around here, unfortunately), clothes pins for heat sinks, run an electric fuel pump outside the tank to push the fuel, etc.
One article I found was where the owner of a older vehicle ran an inline fuel pump just outside the tank to push the fuel to the mechanical fuel pump on the engine. He had a switch mounted where he could activate the electric fuel pump when needed, i.e., hot weather and vapor lock, and then shut it off when the issue was resolved, or no longer needed. He stated that he had no more problems after that. It wasn't a high pressure, EFI type pump, but ran about 3 - 5 psi just to keep the fuel pushing through the lines to the mechanical pump. Unfortunately, the article was from about 2009.
Are there inline electric fuel pumps that can allow fuel to pass through when the pump is not running? Advice/ideas?
It's been a few miles since I changed the fuel filter, but at idle it stays full of fuel and flows just fine any other time other than middle of the day. If you want to get rid of the spacer to a fellow AZ member, just let me know and I'll send you my info via PM. I appreciate it.
