Can anyone provide info on where to obtain and how to replace an ECU for a 1990 F150 / 4.9 liter I6 300 / standard trans / 4x4 ?

Thanks!
Nabor J

 

Removing the ecm is cake. There is a rectangular plug on the left side of your firewall, there is a 10mm bolt in the center of the plug. Disconect your battery and then remove the 10mm bolt and the plug will pull out. Now go inside your cab remove the left side kick panel. The ecu sits right behind it. There is one bracket holding the ecu in place, remove the bolt and the tab. Now you can carefully wiggle the ecu out paying attention to how it is sitting in place.

 

Thanks for the directions for the ECU....are there any other considerations such as flashing / programming it, or is it just "plug and play drive away?"

My fear is that I replace it and the problem doesn't go away, but I have to keep on with this....I've already got $600 into repairs!

 

Plug and play.

 

I'm guessing the ECU is what some people refer to as the "PCM" which is the Powertrain Control Module? A friend mentioned this could be the issue, (although this part "PCM" wasn't for a Ford truck.)

 

yes

 

Just make sure that the numbers match on the ECM's

 

Nitehawkjr-

Is it a part number, serial number, or something else I should look for to match with a new / refurbished unit? Do you have any recommendations on where to look for one online? I don't want to waste time visiting pull-yards and not finding what I need. Should I expect a "core charge" for an ECU? I'm not sure that this is the problem, but it one thing I was told about as a possibility. If you look at my other post and have suggestions, let me know...I'm stumped right now and I'm trying to avoid getting killed by "research costs" at the garage.

 

You can get them at Autozone or other part houses the number will be F0TF-APA or somthing like that.
You could also google them to see what you can find once you have the number off the old one or contact a Ford parts tech with your VIN# and they can give you the correct number of the one you need that is if it has the same motor and tranny setup that it came with.
And yes there will probably be a core charge on it.

 

there are 8 or 9 different ecu's for 90's...on the drivers door frame there should be a calibration code if you're lucky or as posted above have a Ford Parts guy tell you the proper code for it. IT DOES MATTER!