Mechanical fuel pressure gauge cummins

Undoubtedly you have actually heard from friends or internet forums that you need a fuel press gauge on your Cummins Turbo Diesel or else you run the danger of damaging your injection pump. This is true, but only if you own a 1998.5 (first year of the 24-valve engine) to 2002 truck. During these four years of manufacturing, a Bosch VP44 fuel injection pump was provided on these engines. The VP44 is fuel cooled and demands to have actually even more than 5psi to preserve proper cooling.

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The VP44 is fuel cooled and demands to have more than 5psi to preserve appropriate cooling.”

When the VP44 was added to the engine, the folks at Ram/Cummins likewise changed from a mechanical fuel transport pump (tank-to-engine) to an digital fuel transfer pump. After about 60,000 miles these electronic fuel carry pumps were well known for faitempt and/or would certainly limp-along offering marginal fuel pressure. So, the truck could run okay, but doing not have the 5psi of pressure and cool fuel, internally the VP44 would seize and you were challenged with a $2,000 repair bill. Hence the need to monitor fuel pressure of these 1998.5-2002 trucks also as a result of these problems, a whole aftersector has grown-approximately provide owners through much better fuel transfer pump options.

What happens if you own any type of other year Cummins Turbo Diesel and you have actually a fuel deliver pump failure? The truck will certainly not start, so you will have to purchase a new lift pump. If your tank-to-engine fuel transport pump fails, the truck will not begin so you will need to purchase a brand-new transfer pump. So eincredibly day we tell folks through 89′-98′ and 03′-existing trucks, “You don’t require a fuel pressure gauge. Save your money”.

Often customers will certainly desire to buy a press gauge so they understand when to change their fuel filter. The easy answer to this is change the filter eexceptionally 15,000 miles as argued by the owner’s hand-operated. Consider the cost of a quality gauge kit which would be about $225 after purchasing a mount and assorted various other installation components and shipping. In many cases, for the cost of a gauge kit you deserve to buy a situation of fuel filters and also a spare fuel carry pump.

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Our Recommendations

We assumed you would never ask.

For a long-term installation, we indicate either of these 2 gauges which make up the bulk of what we sell for 1998.5-2002 year version trucks:

ISSPRO R17033 Electronic GaugeISS-R17033


Auto Meter 2607900 Mechanical GaugeAM-2607900

Actual numbers: The ISSPRO outsells the Auto Meter 2 to 1.

For a Rapid Diagnostic Check:

We indicate using:


Vuldeserve to Performance Fuel Pressure Test KitVULCAN_TEST_KIT

This kit comes via the essential fittings to examine pressure at the fuel filter head (‘98.5-‘99) or the Schrader test port (‘00-‘02) on your 1998.5-2002 Dodge Cummins Diesel truck.

Installation Hardware Required:

To finish your gauge installation, you will certainly require these added components for stock/unmodified fuel systems:


Vulhave the right to Universal Fuel Pressure LineVULCAN-FH

This fuel line will certainly permit you to tie in straight to the fuel filter head on ‘98.5-’99 trucks. On ’00-’02 model year trucks the line will certainly connect to the Schrader valve situated on the side of the VP44. On digital gauges, the sending unit will certainly attach directly to the various other finish. For mechanical gauges, the various other end will be associated to the isolator supplied in our mechanical gauge kits.



A snubber dampens the fuel push spikes (hydraulic hammering) that is prevalent on VP44 injection pumps. This can be installed on either end of your Vulhave the right to Fuel Line relying on your configuration. Using a snubber will certainly help with pressure spikes viewed on the gauge and also extending the life of your electronic sending unit.

Having trouble visualizing out how it all goes together?

For 1998.5-1999 Trucks


When utilizing the factory Schrader test port on 2000-2002 trucks (PN: FPADPT-KIT shown as substitute for manufacturing facility fitting):


This is a picture of the oppowebsite end when making use of an digital gauge (RLT-SNUBBER is set up between VULCAN-FH and also Electronic sending unit when set up on 2000-2002 trucks):