Wed Jul 09, 2014 4:09 am by Buzzman72
If your gasoline is boiling when it's pretty much straight out of the tank...which is what it sounds like you're saying...then maybe you need to check how your exhaust is routed. [That was a joke.]
Thing is, if your gasoline is trying to boil at an ambient temp of 85 degrees, after only passing into the fuel pump, my first thought is to ask where it's picking up the extra heat to make it boil at that low a temperature. Had the fuel line run right next to the engine, rather than up the frame rail, that MIGHT make a little more sense to me.
Re-check your fuel lines. Pappy had a '70 Plymouth Volare with a 318 that kept killing fuel pumps. After the 3rd one, the guy at the parts store said he wasn't going to replace any more of 'em...so we started looking for an external cause. I'll be darned if I didn't find a bad spot in the fuel line, where it traversed the front crossmember. There was enough grease, dirt, gunk and junk there to keep the line from leaking...but every so often, a piece of the rusted fuel line would flake off and puncture the pump diaphragm on its way to the filter. SO...if you're having a similar problem...those bubbles at the pump just might be air entering the line, instead of boiling fuel.
Just as Smog Guy suggested.
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