How to diagnosis a loss of power on a 1990 Ford Bronco 5.8L

Published on September 4, 2014

Hi Everyone: The customer complaint is a loss of power and a jerking, bucking feeling when under a load. Another repair facility replaced his spark plugs and the same problem. During the test drive I verified his concerns. Next scanned for trouble codes, fuel pressure, volume and current ramping of the fuel pump. As you can see the fuel pressure needle jumping around alot, it was nice and steady at the beginning of testing. The needle Is Not suppposed to jump around For more information be sure to visist:

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