12 Valve Engine and Drivetrain Talk about the 12V engine and drivetrain here. This is for 1994-1998.5 engine and drivetrain discussion only.

How to check fuel pressure?

Thread Tools
 
Search this Thread
 
Old 03-14-2003 | 07:33 PM
  #1  
doomgaze's Avatar
Thread Starter
Registered User
 
Joined: Apr 2002
Posts: 335
Likes: 0
From: London, OH
How to check fuel pressure?

How do I go about checking the fuel pressure at idle and at WOT? The more I read, the more I think I have a bad fuel pump.<br><br>Also, how much do these pumps run?
Old 03-15-2003 | 07:01 PM
  #2  
xzlram's Avatar
Registered User
 
Joined: Jul 2002
Posts: 51
Likes: 0
From: In the great northwest
Re:How to check fuel pressure?

you can tap into the filter housing but that will only give you supply pressure. what exactly is wrong with your pump?
Old 03-15-2003 | 09:24 PM
  #3  
doomgaze's Avatar
Thread Starter
Registered User
 
Joined: Apr 2002
Posts: 335
Likes: 0
From: London, OH
Re:How to check fuel pressure?

I'm just getting pretty poor mileage. At last fill up I calculated a little over 12mpg.<br><br>Also, my truck doesn't seem to be as powerful as it once was.
Old 03-16-2003 | 07:10 PM
  #4  
xzlram's Avatar
Registered User
 
Joined: Jul 2002
Posts: 51
Likes: 0
From: In the great northwest
Re:How to check fuel pressure?

sounds more like a timing problem and getting it timed is alot cheaper than haveing the pump gone through.
Old 03-17-2003 | 01:14 AM
  #5  
TBGH's Avatar
Registered User
 
Joined: Jan 2003
Posts: 96
Likes: 0
From: Elm Creek MB Canada
Re:How to check fuel pressure?

It might be a clogged fuel filter. That will hurt mileage and power. Do you have a boost gauge?<br>John
Old 03-17-2003 | 03:48 PM
  #6  
JGK's Avatar
JGK
Registered User
 
Joined: Jun 2002
Posts: 15
Likes: 0
From: Boise, ID
Re:How to check fuel pressure?

Try checking/replacing the overflow valve, too, before you consider a new pump.<br><br>Lift pumps can be had for about $150. Don't even think about replacing that P7100!
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
madhat
3rd Generation Ram - Non Drivetrain - All Years
68
10-25-2015 08:25 AM
Adam3291
Other
2
05-02-2008 10:08 PM
Gary C
Suggestions, Comments and Site Questions
2
03-15-2004 02:53 PM
BigBlock
12 Valve Engine and Drivetrain
1
04-02-2003 11:03 PM



Quick Reply: How to check fuel pressure?



All times are GMT -5. The time now is 05:27 AM.