Posted by Steve@Advance on November 10, 2016 at 04:22:39 from (24.182.105.179):
In Reply to: Odd 350 problem. posted by notjustair on November 09, 2016 at 20:44:56:
A couple things to check:
Fuel pressure and volume. With the electric pump, you should get a steady stream of fuel, no air, with the pump running. When cranking the mechanical pump should give a strong shot each time the pump cycles, about 3 to 5 PSI depending on the pump.
If there are air bubbles coming through, check for rotten hoses between the pumps and the tank, or possibly a defective pump. Watch for leaks at the vent hole on the mechanical pump.
And take a look at the filter in the carb fitting. For whatever reason the engineers decided the filter needed a spring loaded check valve in it. Sometime, especially when they sit, the valve will stick. You can either take the valve out, or get a filter without the valve.
I also wonder where the fuel is going. Even if it sat for a month or more, there should be enough fuel in the bowl to get it started. Could be in internal fuel leak, especially on a Q Jet carb. They had plugs that leaked, especially if it has a history of backfiring through the intake.
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