502 MPI Fuel pressure?
#11
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Join Date: Sep 2013
Location: Port Deposit MD
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Are you guys adjusting it to 43 psi at idle or wide open? also how would i go about checking for clogs on land?
I have a vortec adjustable regualtor im going to install just wondering what to set the rail pressure to at idle and so on....
I have a vortec adjustable regualtor im going to install just wondering what to set the rail pressure to at idle and so on....
#12
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Per Merc Manual pump pressure should be 34-38 PSI.
#14
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#16
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if it has a cool fuel unit pressure needs to be at 43 lbs,end of story,i went through this last year on one of these.
#17
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Chart A-4 (2 of 5): Fuel System Diagnosis
TEST DESCRIPTION:
2. Wrap a shop towel around the fuel pressure connector to absorb any small amount of
fuel leakage that may occur when installing the gauge. Ignition “ON,” pump pressure
should be 34-38 psi (234-262 kPa). This pressure is controlled by spring pressure within
the regulator assembly.
NOTE: Fuel pump pressure will read lower if battery is not fully charged.
#19
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What page do you find that on? I am un able to locate it. Here is what I find on Page 5E-73, merc manual 23. Im just curious not out to step on any toes.
Chart A-4 (2 of 5): Fuel System Diagnosis
TEST DESCRIPTION:
2. Wrap a shop towel around the fuel pressure connector to absorb any small amount of
fuel leakage that may occur when installing the gauge. Ignition “ON,” pump pressure
should be 34-38 psi (234-262 kPa). This pressure is controlled by spring pressure within
the regulator assembly.
NOTE: Fuel pump pressure will read lower if battery is not fully charged.
Chart A-4 (2 of 5): Fuel System Diagnosis
TEST DESCRIPTION:
2. Wrap a shop towel around the fuel pressure connector to absorb any small amount of
fuel leakage that may occur when installing the gauge. Ignition “ON,” pump pressure
should be 34-38 psi (234-262 kPa). This pressure is controlled by spring pressure within
the regulator assembly.
NOTE: Fuel pump pressure will read lower if battery is not fully charged.
Last edited by mike tkach; 03-27-2014 at 10:03 AM. Reason: adding more information