MPI and sequential injection

[john spears]

George,

The 3.8L to 3.0L conversion should be fairly easy; however they DON'T use
the same ECM. The 3.8L SFI engine uses the 1227148, and the 3.0L MFI uses
the 1227153 ECM. The main difference between these ECM's is PROBABLY the
fact that the 148 has six injector drivers, while the 153 will have only
two. My guess is that you will need the 1227153 ECM to make it come out
right. Let us know how it works out.

                John Spears
 Speartech Fuel Injection Systems

>From: "George M. Dailey" <gmd at tecinfo.com>
>Date: Tue, 1 Apr 1997 06:50:55 -0600 (CST)
>Subject: MPI and sequential injection
>
>Question: A friend has a '86 oldsmobile royal with a 3.8L (sequential
>injection, I think). He blew the motor and purchased a 3.0L '86 olds or
>buick engine instead, by mistake. Were all 3.8L engines sequential for this
>year and were all 3.0L just PFI?
>
>Did they use the same ECM, just different proms?
>
>The 3.0 has a combination sensor only while the 3.8 had a cranck and a cam
>sensor. From the the schematics I've seen, it should be easy to make the
>3.0L work with just a few wiring changes and a prom change. 
>
>Correct me if im wrong.
>
>Oh, by the way, he accidentally installed the 3.0 also. A "jack leg"
>technician tried to feild modify the wiring harnes to accept the 3.0 sensor
>with no success. He simply cut and spliced the colors that seemed to match
>the closest :()
>
>thanks,
>GMD