Harness 635csi L-jet ECU question

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PV-ALPINA
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Location: Sweden

Harness 635csi L-jet ECU question

Post by PV-ALPINA »

Is it the same pinout (harness) for ECU 0 280 001 114 ( Euro 635 CSI L-jet) and 0 280 001 008 (633CSI), i.e., is it possible to run M90 with 0 280 001 114 using the 633 csi harness?

/Johan
Johan Nordkvist
633CSI 1977 Reseda
635CSI 1980 Black
M635CSI 1984 Bronzit Beige
635CSI 1985 Black
635CSI 1988 Zinnober
bpoliakoff
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Re: Harness 635csi L-jet ECU question

Post by bpoliakoff »

If I am not mistaken, 008 is a Motronic ECU and won't be compatible with an Ljet injection harness(system)
81 Euro 635 M90 with motronic. Currently under a complete nut and bolt restoration. Pictures at
flickr.com/photos/bertsphotos.
PV-ALPINA
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Location: Sweden

Re: Harness 635csi L-jet ECU question

Post by PV-ALPINA »

bpoliakoff wrote: Mon Aug 31, 2020 2:12 am If I am not mistaken, 008 is a Motronic ECU and won't be compatible with an Ljet injection harness(system)
You are correct, I meant 0 280 001 103 L-jet 633 csi.

Johan
Johan Nordkvist
633CSI 1977 Reseda
635CSI 1980 Black
M635CSI 1984 Bronzit Beige
635CSI 1985 Black
635CSI 1988 Zinnober
bpoliakoff
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Re: Harness 635csi L-jet ECU question

Post by bpoliakoff »

I am reasonably sure that ECU is for a 528 with Ljet. So I am not sure it has enough "beans" for an M90
81 Euro 635 M90 with motronic. Currently under a complete nut and bolt restoration. Pictures at
flickr.com/photos/bertsphotos.
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Ralph in Socal
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Re: Harness 635csi L-jet ECU question

Post by Ralph in Socal »

Seems you are trying to accomplish my future plans. I have an 81 528i. E12 car That I placed a euro 10:1 motor in. Plan is to use M90 controls with the existing OEM harness as the M90 setup is similar to the euro 10:1.

Good luck and please provide updates on your progress

Ralph
There is a very fine line between "Hobby" and Mental Illness.

85 635csi Zinno Auto
84 528i Euro
83 635 Euro Arktik
81 528i Kastanien 5-speed
88 528e Bronzit (Granpa Car)
86 535i Auto (For Sale)
81 633 csi (retired)
PV-ALPINA
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Joined: Tue Sep 11, 2012 8:02 am
Location: Sweden

Re: Harness 635csi L-jet ECU question

Post by PV-ALPINA »

Ralph in Socal wrote: Mon Aug 31, 2020 5:36 pm Seems you are trying to accomplish my future plans. I have an 81 528i. E12 car That I placed a euro 10:1 motor in. Plan is to use M90 controls with the existing OEM harness as the M90 setup is similar to the euro 10:1.

Good luck and please provide updates on your progress

Ralph
Correct, problem is that I tried a spare M90 ecu on my 633csi and it did not start, could be that the ECU is malfanctioning or that this combo is not possible. My other 635 csi 1980 is still without engine so not possible to check yet if the ECU is indeed shot.
Johan Nordkvist
633CSI 1977 Reseda
635CSI 1980 Black
M635CSI 1984 Bronzit Beige
635CSI 1985 Black
635CSI 1988 Zinnober
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Ralph in Socal
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Re: Harness 635csi L-jet ECU question

Post by Ralph in Socal »

You probably need the matching afm (280 203 002) and injectors (probably not critical to run but M90 injectors are rated much higher volume). Usually a matched set is necessary. Some ECUs are interchangeable within a system (ie. 011 and 008 ecu run 016 afm; 059 and 061 ecu both run 027 afm)

Ralph
There is a very fine line between "Hobby" and Mental Illness.

85 635csi Zinno Auto
84 528i Euro
83 635 Euro Arktik
81 528i Kastanien 5-speed
88 528e Bronzit (Granpa Car)
86 535i Auto (For Sale)
81 633 csi (retired)
bpoliakoff
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Re: Harness 635csi L-jet ECU question

Post by bpoliakoff »

Ralph 002 ECU is for Motronic 1.0 dirty euro M90. 011 is for Motronic 1.1 dirty euro motor. Not sure about 008 but know it is for some form of early Motronic but has a chippable Eprom socket where as 002 doesn't
81 Euro 635 M90 with motronic. Currently under a complete nut and bolt restoration. Pictures at
flickr.com/photos/bertsphotos.
PV-ALPINA
Posts: 33
Joined: Tue Sep 11, 2012 8:02 am
Location: Sweden

Re: Harness 635csi L-jet ECU question

Post by PV-ALPINA »

Ralph in Socal wrote: Wed Sep 02, 2020 4:55 am You probably need the matching afm (280 203 002) and injectors (probably not critical to run but M90 injectors are rated much higher volume). Usually a matched set is necessary. Some ECUs are interchangeable within a system (ie. 011 and 008 ecu run 016 afm; 059 and 061 ecu both run 027 afm)

Ralph
Same AFM in my 633csi (002) and same injectors ln 633csi 1977 as M90 78-81.
Johan Nordkvist
633CSI 1977 Reseda
635CSI 1980 Black
M635CSI 1984 Bronzit Beige
635CSI 1985 Black
635CSI 1988 Zinnober
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