Fuel problem? Pump? - Ranger-Forums - The Ultimate Ford Ranger Resource

4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

LinkBack Thread Tools Search this Thread
Old 01-23-2012
Thread Starter
Join Date: Jul 2009
Location: BUTLER,PA
Posts: 67
Fuel problem? Pump?

Hello everyone. I am having trouble with my 94 4.0 ohv ranger. I think it's the fuel pump but im not sure. Sometimes it will run ok but then it will start to cut out. I'll be going along and it will loose power. I can put my foot to the floor and go about 25. It will get a little gas but it wil buck like a bronco(horse not suv) until I can get it off of the road. It will usually start but sometimes it wont even do that. I switched out the fuel pump relay and thought it fixed it but I was wrong. Does anyone know what might be causing this? I just wanted to make sure that I am getting the right thing before I drop $100+ on a fuel pump.

Also, if it is the fuel pump, is there a aftermarket fuel pump that isnt quite as pricey as the OEM? I know where there is a cheap holley pump but I am used to old carb engines and I dont know how that would work with the computer.

Any help is appriciated.

Reply With Quote
Old 01-23-2012
Join Date: Mar 2007
Location: Upstate,NY
Posts: 2,598
Change the fuel filter then remove the fuel line at the engine. Place a can and some rags at the fuel line and turn the key to RUN without starting the engine. You may have to do this a few times.
Condensation has most likely caused the fuel line to rust inside and is plugging the injectors , so you need to flush it out. I have to do this on my old Dodge every year as it sits to much without being run.
You will the need to remove the injectors and clean them.
I have found that using carb and choke cleaner with the long plastic nozzle stuck down in the inlet side of the injector will blow the crud out quite well BUT WATCH YOUR EYES.
Reply With Quote
Old 01-23-2012
<TX>TORKiT's Avatar
iTrader: (1)
Join Date: Jun 2010
Location: Dallas, TX
Posts: 1,551
I had the same symptoms as ROSCO with my 3.0. The bearings went out in the distributor. The bearings were getting hot then the truck would buck like hell cutting in and out. I had to replace the distributor to correct the problem. I had over 200,000 when mine starting acting up.
Reply With Quote
Old 02-06-2012
Thread Starter
Join Date: Jul 2009
Location: BUTLER,PA
Posts: 67
Actually I have a 94 EFI 4.0L. I thought for sure it was the fuel pump because it wouldn kick on when I turned the key to ignition. Then I went out last night and it did kick on, the truck started runnig bad. So I unplugged the MAF sensor and it started running better. I had changed the MAF last summer but I thought it was defective. I borrowed my brothers MAF and it still runs bad unless I unplug it. Any connection between the MAF and fuel pump. I had gotten to the point where I thought for sure it was the fuel pump, but now that I unplug the MAF I am not sure.
Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
my fuel pump wont turn on ive replaced the relay n the pump.. 00Red 2.9L & 3.0L V6 Tech 1 05-28-2013 10:00 PM
$125 Fuel Pump vs $300 Fuel Pump? Which to get? TheRealestWhiteBoy General Technical & Electrical 12 01-19-2013 08:05 PM
Want to Buy: Fuel line between fuel filter & fuel pump - TN iplayloudly Interior, Exterior, Electrical, & Misc. 7 05-02-2012 04:10 PM
fuel pressure regulator or fuel pump fedupdon General Technical & Electrical 1 01-31-2011 07:04 AM
1999 Ranger, 3.0 L - Will regular fuel pump work (have flex fuel) jakD General Technical & Electrical 3 10-15-2010 12:23 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 11:56 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.