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Old 11-02-2011, 07:31 AM
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poffutt
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Join Date: Jan 2005
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Okay! I am getting somewhere. First, you cannot use a tire gauge to check the pressure at the fuel rail. The needle valve on the rail is too deep for a tire gauge to reach.

Help me figure out which pump is bad. I turned the key on and primed up the gas rail. I took a small screw driver and pushed in the needle valve on the rail. Their was only about 1 pound of pressure. The gas did not spray it just barrly came out over the top.

So I started my Bronco and pushed the needle valve again while it was running. It sprayed this time but very weak, it maybe shot up about 8 inches but did not have strong pressue. How should I determin which fuel pump is dying?