Whine and sluggish performance on 93 80

[davegonz]

I just finished checking the resistance on the fuel pump as per the FSM and got .8 ohms...which falls within spec. The reason I checked it is because of the recent increase in humm/sound coming from the fuel pump area...I can hear whine inside the cab with the truck on. I have also started getting sluggish performance..almost a hesitation when accelerating from standing still. I have swapped out the fuel filter about a week ago, so that couldn't be it (CDAN special) and am now thinking the sluggish performance/whine is due to the fuel pressure regulator. Does anyone have any clue what could be happening or any symptoms of a bad fuel pressure regulator?

Thanks in advance,

 

[santiagol]

in the '91 there is an additional fuel filter inside the fuel tank, attached to the pump. The fuel pump will test OK but fuel flow can be restricted by a dirty filter.

 

[davegonz]

Yeah..I was thinking that the "sock" might be clogged..Can you clean those or are they pretty much replacement only?

Thanks,