Quote:
Originally Posted by treetops
Frank,
You mention a 5 psi pump you used to find leaks in the fuel system in another thread, would that be about the right size? The fuel pump delivery rate should be 150cm3 minimum on the 95 NA version going by the online FSM, not sure if its different for turbos.
I agree the build up of crud in the supply line could cause the 'pinch like' restriction by my logic. Then again, I'm a total newb at these things.
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The fuel pressure doesn't need to be more than the current pump produces, so check the FSM. The more important question is where you locate the pump. If the pump is as close to the tank as possible (as it is on all the gas MB's I've ever seen), then the entire fuel line has positive pressure, and you will have a much lower chance of vapor lock. OTH, if you locate the pump near the engine, the entire length of the line is subject to low pressure.
Another thing you can try is disconnecting the fuel heater. I don't recommend running that way, because warm fuel will give a better spray pattern, which means better economy and performance, and lower emissions.