8747 ecm

[Grand_Wag_85]

Somebody here local has a complete tbi system removed from a motor home. Ecm is the 8747. How does that ecm compare to the 7747? Is it as easy to program, more or less features?

[AwesomeJ10]

I dunno, but I did find this thread: http://www.binderplanet.com/forums/inde ... ion.98759/

sounds like you may consider scrapping the 8747 ecm and go with the 7747, but it would be cool to try the 8747

[Cheap Hobby]

Found thread on gen3 site said 8747 was not as program able due to heavy vehicles needing more grunt than go. Also is set up lock up tc.

[Grand_Wag_85]

I'll probably just Repin the harness for the 7747.

[Bill usn-1]

No repin required. Direct swap for most C3 ECMs.
It's individual sensors that are different between applications.
8747- no knock
8746- added IAT
7747- knock
Then you have the less commons ones like the 6299, 4288, 8062....
all had various trans applications
The C3 ECM used the 2732 chip for most applications.

http://www.tunercat.com/
Go to the ECM definition files to see a list.

Or
http://www.tunerpro.net/downloadBinDefs.htm

Cross reference
http://www.exatorq.com/ludis_obd1/c3xref.html

[Grand_Wag_85]

Thanks for that info Bill! This particular system is going on an IH 345, right up your alley