Odd fuel starvation issue.

[andrewro]

Hi everyone,

A little while ago, I had driven for maybe 15 minutes, then switched off my '02 for ten or so while waiting for a burrito. When I left the restaurant, my car stalled out maybe a block down the road. I was able to coast into the adjacent neighborhood and glide into a parking space.

I nosed around for a couple minutes, then I twisted the fuel pressure regulator a half-notch (one click up) and heard a little "swoosh" inside the fuel line, and the car started right up.

So, any opinions on what that could have been? Vapor lock? Blockage? It's a lot warmer here this weekend, in the 80s. Also, what is the correct fuel pressure setting on these little silver cap-top regulators? Mine was at 1.5 and now it's at 2. Those numbers seem lower than the actual fuel pressure, wouldn't it be somewhere between 5 and 8 psi? This is for a Weber 38/38.

[Napes]

If your carb is correctly set-up and functioning as designed and your fuel pump is OK you should not need an in-line fuel pressure regulator. I regularly drive in 100+ temps in the summer here in So. AZ and the only time I've ever had a vapor-lock problem was once when I mistakenly put in reg. gas in Colorado @ 7,000' elevation. I live @ 4,000', use Premium (I've got 9.5:1 pistons), have a 38/38 and have never suffered vapor-lock here.

[andrewro]

I have to admit - the car came with this setup and it's run fine so far, so I haven't really given much thought to how the fuel delivery system is set up. It usually runs fine and doesn't leak gas so I've just been driving it around and worrying about other repairs instead.

[Brendan_Lopez]

I once had a car with odd intermittant fuel starvation. Ultimately I found that a little chunk of rubber had broken off from inside the fuel hose and would lodge itself against the back side of the carburetor needle valve every now and again.

[Arizona02]

try 3 or 3.5 psi.