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M
MikeVT85 OP
Jul 09, 2026 at 09:45 PM ET
Ever encounter a fuel line vapor lock in your fuel line. I was out & about
on Monday zipping around heavy on the accelerator in my '98 Ford Explorer in 101+ degree heat and the son-of-gun started stalling on me as I accelerated. Checking the temperature gauge, a "check engine light", fuel gauge, etc. as I drifted into 7/11. None of those were suspect. Fuel pump or filter?- no, I had them replaced a couple of years ago. I waited a few minutes and it started right up and I drove gingerly home suspecting the hot weather. Stumped, I went to AI . . . "Vapor Lock". Been driving like a top since. Never ever encountered that before.

5 Replies

Vtskier1 Vtskier1
Fuel pump heat can cause vapor locks. It’s common on boats
But who really knows…..had to put cold water on our boat fuel pump at times to get her moving…..
Coach McGuirk Coach McGuirk
Excellent tip to file away.
Late 80s Hokie Late 80s Hokie
Only on my propane grill once.
V
Va AandM
Good you were able to get off the road. Possibly killed Harry Chapin
by disabling his on the Long Island Expressway
MP4VT2004 MP4VT2004
I've never knowingly encountered it, but have heard of it plenty of times.
I was under the impression it was more common on carbureted engines, but I guess it can technically occur with fuel-injected engines, too.