3.0 pcm?? - Ranger-Forums - The Ultimate Ford Ranger Resource


2.9L & 3.0L V6 Tech General discussion of 2.9L and 3.0L V6 Ford Ranger engines.

Reply
 
LinkBack Thread Tools Search this Thread
  #1  
Old 06-07-2008
joerickson's Avatar
Member
Thread Starter
 
Join Date: Dec 2005
Location: Minnesota
Posts: 142
3.0 pcm??

Hey, I need to get a new pcm for my truck and was wondering what I need to look for when trying to find a used one. My truck is a '99 3.0 4x4 automatic with manual locks, windows and mirrors if that helps any.

I appreciate the help.
Reply With Quote
  #2  
Old 06-08-2008
Member
 
Join Date: Nov 2005
Location: Elizabeth City, NC
Posts: 767
Same exact truck as yours.
Junkyards usually have the best cross references on what'll work.


And why do think yours is bad? They rarely fail.
Reply With Quote
  #3  
Old 06-09-2008
joerickson's Avatar
Member
Thread Starter
 
Join Date: Dec 2005
Location: Minnesota
Posts: 142
I think it is bad because last summer I had an array of problems with it thowing codes. First it threw something with the cam positioning sensor, so I replaced that and everything else that relates to that particular code. Then it threw a misfire code...so I cleared that code, and within a day it threw it again, and the light has been on ever since. I just cleared it again last night and will see if it comes on next time I drive it again. Therefore, I lead these false codes to the computer.
Reply With Quote
  #4  
Old 06-09-2008
04 EDGE
Unregistered User
 
Posts: n/a
is it flex fuel?

have you looked into the misfire code or just dismissed it and condemned the PCM?

it is very rare that PCM's fail.

and if it is bad and your truck has PATS then you can not just "bolt" a new one in. a trip to the dealer will be in order. and there gonna check it out, and tell you the computer is not bad, rather you have a bad fuel injector. if its flex fuel.
Reply With Quote
  #5  
Old 06-09-2008
joerickson's Avatar
Member
Thread Starter
 
Join Date: Dec 2005
Location: Minnesota
Posts: 142
It is flex fuel, I havent checked the fuel injectors at all. Last summer I replaced plugs, wires, cam positioning sensor, and some other things I dont remember the name of. Its been to the dealer and had a diagnostic run on it and they told me that it was the cam pos. sensor that was bad and not the pcm, but after replacing the sensor it still throws the code. It seems like as soon as I fix one part,a code comes up about something different.
Reply With Quote
  #6  
Old 06-10-2008
Member
 
Join Date: Nov 2005
Location: Elizabeth City, NC
Posts: 767
Well, If YOU replaced the CPS, it most likely isn't sync'ed properly.

Did you replace the sensor or the entire synchro assembly?

You should post the code #'s.

Again, it's most likely NOT the PCM.
Reply With Quote
  #7  
Old 06-10-2008
joerickson's Avatar
Member
Thread Starter
 
Join Date: Dec 2005
Location: Minnesota
Posts: 142
I personally didnt touch the CPS, that was installed by the dealer, and it was the entire assembly. The truck runs fine, but it just keeps throwing codes such as the misfire code, when I'm fairly certain that the engine is not misfiring.
Reply With Quote
  #8  
Old 06-10-2008
Level I Supporter
 
Join Date: Aug 2006
Location: Durham, NC
Posts: 3,657
Quote:
Originally Posted by joerickson View Post
I personally didnt touch the CPS, that was installed by the dealer, and it was the entire assembly. The truck runs fine, but it just keeps throwing codes such as the misfire code, when I'm fairly certain that the engine is not misfiring.
Either the CPS that was installed by the dealer is bad, or the CPS wiring and/or connector is bad. The signal from the CPS tells the PCM when to fire the injectors, as well as determine if there is a misfire.

I also agree, your PCM is not the problem........
Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
bad pcm! can i replace the bcm, pcm, and ignition lock? b3000help General Technical & Electrical 3 03-21-2012 09:16 PM
4x4 pcm "EDGE"_of_INSANITY Drivetrain Tech 11 01-17-2008 06:04 PM
OBD2 PCM tests Falkyn General Technical & Electrical 0 11-18-2007 12:30 PM
pcm calibration code BBBB51 General Ford Ranger Discussion 11 01-29-2007 09:02 PM
PCM Question fuze General Technical & Electrical 10 01-23-2006 10:43 AM


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 10:36 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.