I had the same problem, until I got rid of the old glass fuel filter. It
was sucking in air around the rubber seal. Tried lots of stuff, but finally
just got rid of it and went with an aftermarket clear in-line filter. My
guess is that you have an air leak in the fuel system.
Greg Burrows
67 2000
robbieharrison@comcast.net wrote:
> A month or so ago there was a long thread on vapor lock, which I really
> didn't follow much at the time because I had never experienced it. Not
> really sure if that's what's happening now, but it sure seems to meet
> the symptoms mentioned. I've got a '68 U20 with SUs and stock fuel pump.
> No problems cruising around town, but the last couple of times I hopped
> up on the highway she started sputtering and coughing. Pulled off, sat
> for a minute, everything came back to normal and was content to ride
> around at low speeds. Engine temp seems to be fine, and she only gets
> upset when I want to take a dash on the highway. Suspecting vapor lock,
> I went searching for a way to cool off the fuel, and found a fuel cooler
> at Summit Racing, at the link below:
>
> http://store.summitracing.com/default.asp?target=search.asp%3FType%3Dbys
> ummitpart%26Part%3Dflx-4136%26Search.x%3D1%26SearchType%3DBoth
>
> Has anybody tried such a thing on their roadster? It says it's designed
> to work with high output fuel pumps - would the stock pump qualify? Or
> does it sound like I'm barking up the wrong tree entirely? Any help
> would be appreciated
>
> Robbie Harrison
> '68 2000
>
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