MPI and sequential injection

[George M. Dailey]

Thanks for the help John. I would much appreaciate it, if you could tell me
if the two ECMs you mentioned have the same types of connectors on them. It
would also be a blessing if the majority of the pins (power, ground, and
common sensors) are common to each ECM. Or maybe I would come out better
asking for that pot of gold under the rainbow.

Thanks for the help,
GMD


At 10:35 PM 4/1/97 -0500, you wrote:
>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
>
>
>