Two fuel pumps in 1988 STX - 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.

Reply
 
LinkBack Thread Tools Search this Thread
  #1  
Old 05-29-2012
Member
Thread Starter
 
Join Date: Jan 2011
Location: San antonio, texas
Posts: 12
Two fuel pumps in 1988 STX

My son is working on a 1988 STX Ranger. We discovered it has two fuel pumps. The one in the tank is described in the Haynes manual for 1985-1988 models as a low pressure pump and the one bolted on the frame is called the high pressure pump.

The "typical" wiring diagram shown for the 2.9 liter does not have any reference to the two fuel pumps. Is the second "high" pressure pump wired in the same fashion as the "low" pressure pump? We finally got the low pressure pump working, but not sure if the second high pressure pump is. The truck runs and idles, but we haven't driven it yet.
Reply With Quote
  #2  
Old 08-01-2013
Member
 
Join Date: Jul 2013
Location: Savannah, GA
Posts: 3
Why does no one answer these questions?

Is there a better forum where you can actually get information?
Reply With Quote
  #3  
Old 08-04-2013
Member
 
Join Date: Aug 2008
Location: Taylor, Michigan
Posts: 96
Apparently no one is familar with the "two pumps."

There are other forums where there may be someone who is.
Reply With Quote
  #4  
Old 01-15-2014
Member
 
Join Date: Jan 2014
Location: Monson
Posts: 2
Hey i am a new member but i think i can help u. If it came with two pumps it def needs two pumps. to quickly check if both pumps are working put a high pressure fuel gauge on the fuel rail. unplug high pressure pump and start the truck, if it runs on the low pressure pump, have your son plug in the high pressure pump while u watch the gauge on the fuel rail....it should jump up a bit then stable out... it works then!!!!
Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
1988 Ranger Fuel Pump or Fuel Filter? TangoKilo SOHC - 2.3L & 2.5L Lima Engines 2 10-21-2014 08:49 PM
Power but no fuel pressure after 3 new pumps narboleda General Technical & Electrical 2 09-11-2011 08:49 AM
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 04:43 AM.


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.