ECM Swap
Thread Starter
|
New User
Joined: Jun 2003
Posts: 23
Likes: 0
From: USA
ECM Swap
Need Advice! I have an 87 F-150 4.9 M/T, The ECM is in the process of taking a dump.
I have one out of a 90 F-150 4.9 M/T but it has different part number. Both are EFI. The 87 is a short wheel base the 90 Long. Both have dual tanks,However the 87 has three pumps the 90 had two.
Does anyone know if I can use the 90 ECM in my 87? Ford has'nt carried it since 1999 and the after market tells me I have to send it in and have it rebuilt (2-3 week turn around)
Thanks for any and all response Dennis
I have one out of a 90 F-150 4.9 M/T but it has different part number. Both are EFI. The 87 is a short wheel base the 90 Long. Both have dual tanks,However the 87 has three pumps the 90 had two.
Does anyone know if I can use the 90 ECM in my 87? Ford has'nt carried it since 1999 and the after market tells me I have to send it in and have it rebuilt (2-3 week turn around)
Thanks for any and all response Dennis
Post Fiend
Joined: Mar 2002
Posts: 19,402
Likes: 38
From: Bonita Springs FL
I have a 1989 and a 1991 F-150, both with manual trannies and both with the six. I have noticed some differences between the two, mostly with regard to cold idle on initial startup. Nothing to get worked up over.
I would do the swap. I'm about 98% sure it will work, and I'm 99.999% sure it won't hurt anything, even if it doesn't work.
I would do the swap. I'm about 98% sure it will work, and I'm 99.999% sure it won't hurt anything, even if it doesn't work.
Thread Starter
|
New User
Joined: Jun 2003
Posts: 23
Likes: 0
From: USA
The 87 set for 11 years. I rebuilt it 15,000 miles ago, useing the old sensors. Resently started haveing varius preformance problems.
Replaced EGR and Sensor as well as the EGR control cylinoid. After doing so I reset the puter by removeing the battery cables and holding them togather for 1 minute. After doing so it would'nt idel worth a whoot.
Scaned it again and replaced IAC valve. Still no help. Did some home work, scaned it again and replaced O2 sensor,Coolant temp sensor,and ACT sensor. Runs MUCH beter but still wont idel very good and dies at stop lights now and then.
Closed the hood with the key on and the fuel pump ran continusly, until I turned off the key. Turned it back on then pumps worked properly.
My last scan was a code 12, ECM not able to control idel. Rechecked my new IAC valve and it checks good. ECM is the only thing I can think of.
I will try the 90s ECM and hope it works.
Thanks for your response's
Replaced EGR and Sensor as well as the EGR control cylinoid. After doing so I reset the puter by removeing the battery cables and holding them togather for 1 minute. After doing so it would'nt idel worth a whoot.
Scaned it again and replaced IAC valve. Still no help. Did some home work, scaned it again and replaced O2 sensor,Coolant temp sensor,and ACT sensor. Runs MUCH beter but still wont idel very good and dies at stop lights now and then.
Closed the hood with the key on and the fuel pump ran continusly, until I turned off the key. Turned it back on then pumps worked properly.
My last scan was a code 12, ECM not able to control idel. Rechecked my new IAC valve and it checks good. ECM is the only thing I can think of.
I will try the 90s ECM and hope it works.
Thanks for your response's
Fleet Owner
Joined: Aug 2005
Posts: 23,666
Likes: 301
From: Easton,Ks
You might change some of the capacitors in the PCM if the swap don’t work.
Check out this URL
http://www.tmo.com/howto/ecu1g/caps.htm
Check out this URL
http://www.tmo.com/howto/ecu1g/caps.htm
Thread
Thread Starter
Forum
Replies
Last Post
justforkicks
1987 - 1996 F150 & Larger F-Series Trucks
11
Dec 7, 2011 07:13 PM
hymiller
1987 - 1996 F150 & Larger F-Series Trucks
3
Jan 19, 2006 12:51 PM
