Bad '85 ECM... Options??
Thread Starter
Heel & Toe
Joined: Mar 2012
Posts: 22
Likes: 6
Bad '85 ECM... Options??
New to the vette world, but been searching here and other boards to begin getting up to speed.
My question... The shop told me the Ecm needs to be replaced (shorting out on a few circuits). Would it be better to replace it with another '85, or later MAF year ECM?
Mainly curious about other options for better fuel/timing tables and cold start injector delete. Thanks
My question... The shop told me the Ecm needs to be replaced (shorting out on a few circuits). Would it be better to replace it with another '85, or later MAF year ECM?
Mainly curious about other options for better fuel/timing tables and cold start injector delete. Thanks
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
The '165 ECM from a 86- 89 TPI car ( Any inc more common F-Body TPI; same ECM )
and a tune from a '89 Vette to delete the cold start setup
Requires re-pinning of the '85 harness to suit later ECM
http://www.eecis.udel.edu/~davis/z28/ecm_swap/
but you get rid of the rare and expensive '85 only MAF module and replace it with a couple of cheap relays
Also next to no tuning support for the '870 '85 only ECM whereas '165 ECM is well hacked and supported
and a tune from a '89 Vette to delete the cold start setup
Requires re-pinning of the '85 harness to suit later ECM
http://www.eecis.udel.edu/~davis/z28/ecm_swap/
but you get rid of the rare and expensive '85 only MAF module and replace it with a couple of cheap relays
Also next to no tuning support for the '870 '85 only ECM whereas '165 ECM is well hacked and supported
Racer
Joined: Jan 2007
Posts: 252
Likes: 5
From: bethlehem PA
