Dodge Cummins Diesel Forum

Dodge Cummins Diesel Forum (
-   94-98 Powertrain (
-   -   2500 max rpm (

pa coal roller 05-13-2019 05:55 PM

2500 max rpm
Why can I only get 2500rpms on of my truck. I can hold it flat to the floor I can feel like it hits a wall like it loses fuel on something truck has auto trans. Throttle hits the stop on the injection pump. I also have 4k Gov springs. It will free rev just find to 3000rpm.

hemirunner426 05-13-2019 07:30 PM

fuel pressure please?

Read the fuel sticky in these forums for troubleshooting.

pa coal roller 05-13-2019 09:16 PM

Idk what it is I need a guage. I did upgrade the spring in the lift pump and have a adjustable over flow valve. Have all new fuel lines.

dd453ford 05-13-2019 11:08 PM

Did this just start happening, or is it an ongoing issue? When was the 4K GSK installed? Would it rev above 2500 then? Or is it that your automatic transmission shifts to the next gear at 2500? More detailed info please!

nSaEvAyL 05-14-2019 01:10 AM

15 Attachment(s)
This is why I have stayed off this site for the last 6 years. How do you have almost 1400 posts and been a member on here for almost 10 years and proceed to ask a question worded this poorly?

This is right up the line with "why won't my truck start?"

When did you add your GSK?

Did you correctly install your GSK with the right stud clearance? Probably not..

What is your fuel pressure?

Have you changed your fuel filter?

hemirunner426 05-14-2019 01:14 AM


Originally Posted by pa coal roller (Post 28980479)
Idk what it is I need a guage. I did upgrade the spring in the lift pump and have a adjustable over flow valve. Have all new fuel lines.

It doesn't matter if it is new or has 600,000 miles on it. To understand a problem requires collecting data about the problem. Get a gauge and we'll start there.

Sent from my LG-H932 using Tapatalk

pa coal roller 05-14-2019 08:26 AM

No it's not the Gov springs I been fighting this issue for a while. It will free rev to 3000rpm for a while. I am not a new be on here or to 12v. Y do guys act so rude to someone if u dont have anything nice to say than dont say anything at all. Never mind than I will figure it out myself thanks for the guys that did help. Someone just delete this post please

hemirunner426 05-14-2019 10:02 AM

Nobody here is acting rude. The question did not contain the information to indicate you've done any diagnostic. Without any information we resort to nothing but guess work. That is frustrating to some.
Anyways, people here want to help... you just can't be vague in your queries.

pa coal roller 05-14-2019 12:16 PM

That's fine I dont need ur help thanks anyways

dd453ford 05-16-2019 02:13 AM

Wow!!?? I can even say it backwards: ??!!woW
So sad that people these days ask for help and then become offended if you ask questions to get more info. I own a hardware store, and more and more often these days, people seem to feel that you are attacking them if you ask for more info...

pa coal roller 05-16-2019 07:23 AM

I am not offended by anyone. I just dont need the drama from anyone I am getting to old for that stuff. I look at it this way if he was tried of beening on here than y post for? I ask for help not why hes piss off at other people. Yeah maybe I didnt give enough info at first but give me some time.

GAmes 05-16-2019 08:20 AM


Originally Posted by nSaEvAyL (Post 28980641)
This is why I have stayed off this site for the last 6 years.

I took a look at your last post from 2014. So tell me, do you still believe this?


Originally Posted by nSaEvAyL (Post 10055978)
. Your boost lines going to your boost gauge have like a 3-4mm inside diameter (I'm just throwing that number out there) however, psi=pressure per squar INCH not PER MILIMETER. When a 1 Inch line will lift 40lbs of weight when charged to 40psi, your 4mm boost gauge will lift, well lets see. 25.4mm per 1 inch. So math: 425.4 will give us what percent difference it is between a 1 inch hose and a boost line. So 425.4=0.1574 or 15.74%. So your boost gauge is 84% (100%-15.74%) smaller than what PSI reading are suppose to be measured in (a 1inch hose).

All times are GMT -4. The time now is 11:32 PM.

Powered by vBulletin® Copyright ©2000 - 2019, vBulletin Solutions, Inc.
User Alert System provided by Advanced User Tagging (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.

For the best viewing experience please update your browser to Google Chrome