Dodge Cummins Diesel Forum - Reply to Topic
98.5-02 Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission Ect..NO ADVERTISING .

Thread: Fuel problems Reply to Thread
Title:
Message:
Trackback:
Send Trackbacks to (Separate multiple URLs with spaces) :
Post Icons
You may choose an icon for your message from the following list:
 

Register Now



In order to be able to post messages on the Dodge Cummins Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










  Additional Options
Miscellaneous Options

  Topic Review (Newest First)
08-21-2019 09:34 PM
Everett777 Fass should be directly hooked to tank not to the fuel pump. The fass does not need a fuel pump to supply it. A fuel pump will cause a restriction almost like having a clogged fuel line. It makes sense it is getting high pressure above idle because once u put a strain on the motor the fass is trying to suck fuel from a fuel pump that is blocking the line
08-21-2019 03:48 AM
ledjunkie I assume you have checked the fuel lines. The photo with the in-tank pump the fuel lines look like they are cracked where the clamp is. Have you checked to see if the fuel level in the stock filter housing is staying full? I had a problem similar. The truck would run then after about a mile or two the truck would shut down. Bumping the key numerous times would fill the filter stock housing and the truck would start back. Then repeat. The problem worsened to the point it wouldn't drive out of the driveway.

You can jump the relay and manually operate the FASS while in the engine compartment to check for flow. I replaced my relay with a Bosch relay, it was cheap, but my problem persisted. Then found the fuel lines that looked fine were hard and cracked which caused lack of fuel pressure.

I think the fuel line was less than 30.00 for the entire run. The relay was cheap as stated. Replaced the fuel line and the problem went away.
08-20-2019 11:09 PM
bigfish95971 Are you sure both pumps are wired and running?
08-20-2019 07:57 AM
Silvergorilla Are you sure it's not an issue with the ejwa since it's been ran that way for so long? Also you should be able to just pull that pump out and run that 1/2in line into the fass
08-20-2019 01:51 AM
Troylockler My exact problem


Sent from my iPhone using Tapatalk
08-20-2019 01:37 AM
Troylockler How would i go about deleting it? The guy I bought it from had the same set up since 07. Iím not to sure but the pump in the tank was to get it to the FASS 150 lift pump witch thatís makes the pressure like I said Iím not to sure this is my first diesel but heís had the truck since 02 and I have all the receipts since then but everything was redone engine wise @470,000 currently has 527,000


Sent from my iPhone using Tapatalk
08-20-2019 01:37 AM
Silvergorilla
Quote:
Originally Posted by mykeb View Post
I really really dislike the idea of the FASS pulling thru the intank pump.
The in-tank pump cant match the FASS, thereby creating a restriction on the FASS.
Not saying it is your problem, but am saying...i strongly expect it to drastically shorten the life of your FASS, and...
Could see where there is very strong potential for that restriction to cause weird pressure readings.
I could definitely see it affecting the fass negatively since it's most likely working twice as hard as usual now.
08-20-2019 01:31 AM
mykeb I really really dislike the idea of the FASS pulling thru the intank pump.
The in-tank pump cant match the FASS, thereby creating a restriction on the FASS.
Not saying it is your problem, but am saying...i strongly expect it to drastically shorten the life of your FASS, and...
Could see where there is very strong potential for that restriction to cause weird pressure readings.
08-20-2019 01:26 AM
mykeb There shouldnt be a pump in the tank...and....a pump on the frame rail(FaSS).
It should be one, or the other.
08-20-2019 01:21 AM
Silvergorilla I would completely delete that and run it straight to the pump. To me that's just a place for restrictions, leaks, and something to cause issues. I havent messed with a vp truck for quite some time but I'm pretty sure on mine it just had a fass running to the VP. The other one I had just had a raptor on the block as it was mostly stock. None if mine every had the upgraded pump in the tank though.
08-20-2019 01:09 AM
Troylockler To hereŅ


Sent from my iPhone using Tapatalk
08-20-2019 01:08 AM
Troylockler Completely bypassed


Sent from my iPhone using Tapatalk
This thread has more than 12 replies. Click here to review the whole thread.

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

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