Power but no fuel pressure after 3 new pumps - Ranger-Forums - The Ultimate Ford Ranger Resource

General Technical & Electrical General technical and electrical discussion for the Ford Ranger that does not fit in any other sub-forum.

LinkBack Thread Tools Search this Thread
Old 09-08-2011
Thread Starter
Join Date: Sep 2011
Location: SA, TX
Posts: 2
Power but no fuel pressure after 3 new pumps

I have lurked on and off on this site since I bought my Ranger in 2000 and it has saved me and my wallet many times. My favorite was a repair to the door lock actuator using aluminum foil which is still going strong 5 years later. I have searched about my latest problem (no start with p0171 & p0174), but I haven't found a post that covers my issue.

6 weeks ago my truck died in my (uphill inclined) driveway. I went outside, started it up to let the a/c run, then went back out 5 mins later just in time to see it idle really badly and die on me. No CEL, just dead truck (cranked, but didn't start). It's my only transportation at the moment, so I thought I'd just have it towed and fixed instead of figuring it out over a few days myself.

The mechanic replaced the fuel pump, it ran for a few days, then CEL came on, then it died a couple of days later. Towed back to mechanic, it started up fine and I drove it home. Next day CEL again then it died a couple of days later. Towed back and mechanic changed the pump 2nd time. A few days later and the same thing. CEL, then it died in a few days. Checked codes (the mechanic hadn't) and got P0171 & P0174. Checked fuel pressure at the schrader valve (10psi) and replaced the filter and pump. Truck started for a few seconds and died. Still @10psi. I have a sense of achievement having dropped the tank and replaced the pump, but my sense of achievement won't get me to work. Each time I can feel when it's about to go (rougher idle, couple of cranks to start, etc)

I can hear the pump and the relay no problem. Could this be electrical? Where do I check power to the pump? Could the fuel line be blocked on the engine side of the filter? The tank was pretty clean and the fuel lines on the tank side were OK (until I put a kink in one - another $20).

2000 Ranger 3.0 flex manual trans w/127k

What do I need to replace (apart form the mechanic)?
Reply With Quote
Old 09-09-2011
Join Date: Mar 2007
Location: Upstate,NY
Posts: 2,598
Have you checked the fuel pressure damper on the fuel rail?
Reply With Quote
Old 09-11-2011
Thread Starter
Join Date: Sep 2011
Location: SA, TX
Posts: 2
I took it off and it looked fine. Not sure how it would affect the pressure, I thought it just evened pressure out in non-return systems.
Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
Two fuel pumps in 1988 STX ohioac General Technical & Electrical 3 01-15-2014 11:04 PM
4.0 OHV Fuel Pressure / After-market Fuel Pump Rooks 4.0L OHV & SOHC V6 Tech 1 12-28-2011 12:52 PM
2 fuel pumps, in-tank bad? how do u know? ripley12 General Technical & Electrical 1 11-05-2008 10:55 PM
3 Dead Fuel Pumps My91Ranger 8-Cylinder Tech 9 07-16-2008 11:32 AM
fuel pumps.... lifted97ranger 4.0L OHV & SOHC V6 Tech 4 12-06-2006 08:26 PM

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not 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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

All times are GMT -6. The time now is 04:34 PM.

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.