HELP its me again HELP
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Senior User
Joined: Jul 2007
Posts: 174
Likes: 2
From: G-VEGAS TN
Papaw (grandfather) sorry ima redneck lol but the fuel pumps in the tanks are both under a year old but the high pressure pump is oem never been replaced and the computer was replaced the same time the in tank pumps were and no i didn't check the pressure on the rail but i did take the lil cap off of the valve and stick a screw driver in it and it shot fuel way up in the air but i did notice that when my fuel pump turns on it has a high pitch whine when it starts but after it runs for just a sec it starts sounding like gears grinding do these high pressure pump work offa diaphragm or are they just plain out electronic ?
Fleet Owner
Joined: Aug 2005
Posts: 23,668
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From: Easton,Ks
Originally Posted by ole_smokey_88
do these high pressure pump work offa diaphragm or are they just plain out electronic ?
If you are asking if the pumps pump by way of a diaphragm or rotary I have not seen this information anywhere but another member of this forum once said that they were rotary. So any noise coming from the pumps would have to be cavitation (sucking air into the rotor) or the motor bushings (I guess they are bushings and not bearings).
