Engine/Transmission (1998.5 - 2002) What's too much pressure

[BHitt]

Installed Airtex lift pump now have 25 psi at idle. Maybe to much??I hear there are some trucks that have to use a gage higher than 30 psi. How much is too much??

 

[bbodammer]

give us some info on your truck. You'll find lots of opinions on this, but I wouldn't run any higher then 20 or so on a vp. There are guys running over 30psi but usually they are 3rd gen truck with the cp3 injection pump. I don't think the seals and such in the vp's need or like that high of pressure.

 

[JLandry]

I'd suspect your fuel pressure gauge might be in error. An Airtex shouldn't be capable of that much pressure. Mine's never more than about 18psi at idle.



I'd check your fuel pressure using a pressure test gauge set available from Geno's or any good auto parts store.



Good luck,



John L.

 

[BHitt]

My truck is a 99 2500 with 162k on the meter. I left my assist pump hooked up which may be cause of extra press.

 

[fox]

Diesel shops say anything over 12 is not recommended.

 

[DIESELWRKS]

not trying to start a word war. but not all shops say the same thing. if you want to know a direct answer call a few of the reman shops and call a couple well know diesel shops and see how much of a difference you gather. I run 24 at idle and 19-20 driving and no lower than 14 at wot. however gauges are not as accurate as you would expect mine changes a couple psi due to mine having a constant leak between the gauge and isolator I put more liquid silicon in it and it goes back up. some run anti-freeze in them I dont. I have 20k on this inj-pump from rip no probs and replaced the old oem one at 120k because it was the old brass cyl design.



2002 HO 6-SPD LB 4X4 QC HTT 62/14 SB-FE TST PM3/SMARTY MACH 4'S, RINGED AND STUDS, AFE/2 " 4"EXHAUST D/PRICOL GAUGES, FASS 150, VULCAN 1/2 DRAW-STRAW, 3/8 FUEL LINE, DSS-TRAC-BAR STEER-BOX, AIR BAGS,17'' KMC BLACK HOSS, 315/70/17 MICKTHOM MTZ'S 6" RCD LONG ARM LIFT AND DE-BADGED FOR FUEL MILEAGE. :-laf... THANKS RIP www.SOURCEAUTOMOTIVE.BIZ

 

[blacksheepdiesel]

My AirDog puts has put out 19psi for the past 297,000 miles and the VP I just replaced had 262,000 miles on it.

Godspeed,
Trent

 

[DFleming]

I am planing to run a mech pump on my 01 and want I am going to get is about 45 at idle and 30 driving down the road, and I have spokin with several people that have done the same thing and have had no problems with it.

 

[BHitt]

Thanx for the info. Installer said no problem with this much press. I have had so many problems with vp44 pos I am always concerned. really proud to have this much to work with after going so long worrying what can happen next.