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5.9L 12V Performance Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with P7100 Injection Pumps Related to Performance and Longevity

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12V Boost Gauge Install

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Old 07-14-2008, 08:15 AM
Dr. Evil's Avatar


Do you need any help with the guage install/wiring?

Dr. Evil's Sig:
98 12V quad cab 4X4 AND 2001 24V quad cab 4X4


Last edited by Dr. Evil; 07-14-2008 at 08:47 AM..
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Old 07-14-2008, 09:24 AM
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Let us know. Between us here there are probably more than 1000 installs.

Wyatt Earp's Sig:Wyatt Earp
2012 Cummins Dodge 3500 Crew Cab, Long Box, Colour Match Canopy, S&B intake, VHF and Cell Booster
Other Car: 2008 MB R320 CDI - Diesel Luxury
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Old 07-21-2008, 01:40 PM


Default wires

i finnaly got the wires in and hooked up right. took me a while to do so but they are in.
next step would be to get the battery terminal fixed for some reason this thing decided to melt and split the female end for no reason all grounds and all + wires was hooked up correctly ther are no loose hangin wires. my volt meter bounces around between 12and14 volts and when i step on it the lights get brighter i think maybe the alt might be going out.
and what is the difference between the p7100 inj pump and the other? just wondering.
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Old 07-21-2008, 07:02 PM
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Hot pockets?!?! THEY WERE LEAN POCKETS!!


p7100 and ve are mechanical pumps

2500HeavyDuty's Sig:01' Dmax Ec/Lb: EFI Live tuned by me, Suncoast stage IV, Banks Intake w/ super scoop, 5" exhaust to 6" Stack, Ported intake Horn, Hybrid FPR, Coated CAC pipes, AirDog 150, Gauges, 35's Mounted on H2's lowered. and a Few more mods.
gt42 up the sleeve

06' Jetta TDI: Bone stock 42MPG @ 80mph.


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Old 07-27-2009, 12:06 PM


Default boost gage install on dodge cummins

Originally Posted by Dr. Evil View Post
This is easy...:

Click the image to open in full size.

Boost Gauge Installation Dodge Cummins Turbo Diesel 1991-1998 12 Valve (Intercooled) - the above pic is of a first gen 12V, the procedure is the same for a second gen 12V.

1. Locate and remove the 1/8" NPT pipe plug (see pic) on the driver's side of the intake manifold.

2. Install the fitting and connect the hose making sure that the hose fits snug but does not pinch.

Alternately, you can drill and tap the intake manifold.
hey guys, i would like to follow up on this old thread, but still has some great information.

i found two of these ports. one of the ports is used and takes this boost pressure to back of IP pump. the other is open.

i assume i can use the open one? or do i need to T into this existing line?

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Old 07-27-2009, 02:03 PM
Dr. Evil's Avatar


Bill, this pic is more correct for a p-pumped 12V:

Click the image to open in full size.

Its a 1/8" pipeplug.
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Old 07-27-2009, 02:21 PM
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You do not need to T into the other one just use the blind hole thats not being used.Someone said about the gauges getting noisy if you do not tap the air horn and thats not correct at all.The mechanical gauges have been in my truck since 1998 and I have had no issues with the boost gauge at all.

Hammer's Sig:2005 Dodge Ram 2500,Black Sport,Quad Cab SB
NADP Billet Auto,2 Pumps & 2 Big Chargers
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Old 08-09-2009, 07:30 PM
tricolor cummins



not sure how old this thread is but i joined diesel bombers because of it. anybody have tips for wiring gauges? im about to install a pyro transtemp and boost gauge from glowshift.
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Old 03-05-2010, 09:45 AM
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Diesel Fan



i understand the process and found the port but the port is threaded and the fitting in the kit is a female adapter.... how does that work?

jeepdr79's Sig:1994 dodge 12v 4x4 straitpiped, pump turned up, stage 2 inj, 0 plate crankedup veg oil conversion http://www.hamptoncovechiro.com/
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Old 03-05-2010, 09:55 AM
Dr. Evil's Avatar


Youll need a different fitting (male) or you could get a 1/8" npt nipple.

Not sure where you go your guages from - they shouldnt ship like that.

Last edited by Dr. Evil; 03-05-2010 at 10:04 AM..
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