Installing Fuel pressure gauge
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Installing Fuel pressure gauge
Need help 99 dodge whats the right way or right location to install the senor for the fuel pressure gauge tap into the Pump or can tap in into a spot where fuel filter is with a banjo nut , or over by the fuel filter supose to be a 1/8 in pipe plug??? kind of lost cause i wanna make sure i get a good reading please help me out Thanks
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I would strongly suggest you get rid of banjo bolts everywhere.
Go to Vulcan Performance and get their kits.
(For 98 1/2 to 2002 Dodge - see:
Draw Straw II 1/2 in. draw tube and 1/2 in. pushlock fitting
The line between the fuel filter and the VP pump has great provisions for adding the fuel pressure gauge. The elbow fitting (far better flow than a banjo bolt) also has a 1/8" NPT threaded tap. Get a 12" long grease gun hose and thread one end into the elbow fitting (use Teflon goop, not teflon tape). At the other end of the grease gun hose - put a "T" - one side of the "T" - screw in the fuel pressure sender. On the other side of the "T" - screw in a pressure switch that has Normally closed contacts that OPEN if the pressure is greater than 5 psi.
With the above, you have better flow to the VP pump, you mount the sender away from the block (vibration isolation), and you can wire in a Red Light that comes ON if the fuel pressure drops below 5 psi to let you know of a possible problem!
Go to Vulcan Performance and get their kits.
(For 98 1/2 to 2002 Dodge - see:
Draw Straw II 1/2 in. draw tube and 1/2 in. pushlock fitting
The line between the fuel filter and the VP pump has great provisions for adding the fuel pressure gauge. The elbow fitting (far better flow than a banjo bolt) also has a 1/8" NPT threaded tap. Get a 12" long grease gun hose and thread one end into the elbow fitting (use Teflon goop, not teflon tape). At the other end of the grease gun hose - put a "T" - one side of the "T" - screw in the fuel pressure sender. On the other side of the "T" - screw in a pressure switch that has Normally closed contacts that OPEN if the pressure is greater than 5 psi.
With the above, you have better flow to the VP pump, you mount the sender away from the block (vibration isolation), and you can wire in a Red Light that comes ON if the fuel pressure drops below 5 psi to let you know of a possible problem!
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Putting a fuel pressure sensor at the top of the fuel filter is great if you want to know the pressure at the fuel filter.
But you will loose some pressure as the flow works through the banjo bolt at the bottom of the filter, along the fuel line, and then at the banjo bolt on the VP44 pump.
Think dynamic, not static! Static - fuel pressure will be the same at multiple locations. But when fuel is flowing to meet the highest demand, the pressure drops at various locations will become greater - and failure to measure the pressure accurately (i.e. - where you are most concerned - at the input to the VP44 pump) means possible problems!
Replacing the banjo bolts is one of the least expensive things that can be done to improve fuel pressure/fuel flow to the VP44 pump - and it gives you the benefit of being able to get a better pressure tap to accurately measure fuel pressure. I can't stress enough that doing anything else is a compromise that should not be made!
But you will loose some pressure as the flow works through the banjo bolt at the bottom of the filter, along the fuel line, and then at the banjo bolt on the VP44 pump.
Think dynamic, not static! Static - fuel pressure will be the same at multiple locations. But when fuel is flowing to meet the highest demand, the pressure drops at various locations will become greater - and failure to measure the pressure accurately (i.e. - where you are most concerned - at the input to the VP44 pump) means possible problems!
Replacing the banjo bolts is one of the least expensive things that can be done to improve fuel pressure/fuel flow to the VP44 pump - and it gives you the benefit of being able to get a better pressure tap to accurately measure fuel pressure. I can't stress enough that doing anything else is a compromise that should not be made!
Last edited by vineyardm; 12-25-2010 at 12:51 PM.
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