1994 4x4 4.0 engine died - 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.

Reply
 
LinkBack Thread Tools Search this Thread
  #1  
Old 09-22-2016
Member
Thread Starter
 
Join Date: Jan 2015
Location: Aitkin
Posts: 9
1994 4x4 4.0 engine died

My 1994 4.0 extended cab ranger died at stoplights with some smoke in cab by drivers side, has spark but no fuel. Can't find a burnt wire my check engine light no longer comes on when i turn on the key what could it be?
Reply With Quote
  #2  
Old 09-23-2016
RF Veteran
iTrader: (1)
 
Join Date: Jan 2014
Location: Vancouver, BC
Posts: 5,202
No CEL(check engine light) means no computer, so no fuel, spark is run by the EDIS module so would still work.

When you turn on the key the ignition switch(under steering column above brake pedal) sends 12volts to the EEC relay in the engine fuse box.
EEC Relay closes and sends 12volts to the EEC(computer) and EDIS module.

Since spark is working I would think EEC Relay is "clicking" closed

Since CEL is not then either computers power wire is bad or computer is.
In 1994 the computer should be on drivers side of engine bay next to firewall between inner fender and cab.

Drawing of location here: http://www.justanswer.com/uploads/mu...5_204601_1.png

Computer is called PCM(powertrain control module) by Ford, and is labeled as such in drawing, upper right

Smoke means something fried, simple as that, not sure you would get smoke in the cab from PCM but might happen.
Unhook battery, FOR SURE, when checking any wiring, locate PCM and pull it out, remove 60 wire connector and then open the top to see circuit board.

Good look at what you should see here: Ford EEC-IV

Also shows what wires to test for 12volts with key on
Reply With Quote
  #3  
Old 09-25-2016
Member
Thread Starter
 
Join Date: Jan 2015
Location: Aitkin
Posts: 9
Thanks i finally got the ecm out and it's fried have to find out which pin # feeds it power to check that out. Does anyone have a used one for sale? f47f-12a60-cma or where is best place to buy them?
Reply With Quote
  #4  
Old 09-25-2016
RF Veteran
iTrader: (1)
 
Join Date: Jan 2014
Location: Vancouver, BC
Posts: 5,202
Above Ford EEC-IV link has most of the pin wiring.

Pin #1 will have 12volts all the time, that is the KAP(keep alive power), it allows computer to save settings in memory, like a radio has to save pre-sets and clock time.

Pins 37 and 57 get 12volts from the EEC relay when key is turned on, these are the main power wires for the computer.

EEC relay is in the engine fuse box, it also powers the fuel injectors, fuel pump relay(not pump), ignition module(EDIS) and MAF sensor

EEC/PCM/ECM numbering works like this: f47f-12a60-cma
F4 = 1994, so F3 = 1993, F5 = 1995
7F = Ranger model
12A60 = Ford part number used for ALL computers, Ford still uses this number for the computer in any model

CMA = the base software and firm wear loaded when computer was made, Ford never released a cross reference for this number

There will also be a larger number stamped on the label, this number will also be on a sticker found in engine bay, usually drivers side by hood hinge, also in passenger door jab sometimes.
This number is the software loaded after vehicle was completely built so includes changes for any options added that the computer needs to be "aware of".

A 1993 or 1994 computer should be OK to use, 1995(and up) had EEC-V computer so won't work
EEC-IV computers only need to control engine and trans if an automatic, they didn't control 4WD.
If you have an EGR valve or Cam Position sensor(CPS), so a 1994 truck sold in Calif., then you need a computer from a Ranger also from Calif.

If in the other 49 states then you don't have an EGR or CPS

So parameters are
1993/1994, F3/F4
Ranger 7F

Last edited by RonD; 09-25-2016 at 10:58 AM.
Reply With Quote
  #5  
Old 09-25-2016
RF Veteran
iTrader: (1)
 
Join Date: Jan 2014
Location: Vancouver, BC
Posts: 5,202
Weird, it cut my post off at the bottom and I can't edit it???


1993/1994, F3/F4
Ranger 7F
Reply With Quote
  #6  
Old 09-25-2016
RF Veteran
iTrader: (1)
 
Join Date: Jan 2014
Location: Vancouver, BC
Posts: 5,202
Weird, it cut my post off at the bottom and I can't edit it???
Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
engine died now has trouble cranking littlered 2.9L & 3.0L V6 Tech 4 05-29-2015 11:28 PM
engine died bbaughman2008 DOHC - 2.3L Duratec / Mazda L Engines 5 07-13-2013 11:30 PM
Engine died and quit turning over, thoughts? luciow_95 2.9L & 3.0L V6 Tech 5 05-09-2013 08:12 PM
engine died on me the other day.. STLRanger General Ford Ranger Discussion 7 03-31-2012 08:52 PM
Engine died? Ardy General Technical & Electrical 4 12-03-2010 08:13 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 On
Pingbacks are On
Refbacks are On



All times are GMT -6. The time now is 01:07 PM.