ECU identification Options

[tradisrad]

Hi 914 club, I am a new member to the club but a long time owner (since 1989),
Any how, I am looking to identify the make of my ECU, I know it is as simple as looking at the sticker on top of the ECU, however at some point the ECU I am currently using was spray painted and then the paint was scratched away to reveal the sticker (not by me) and when the paint was scratched away the numbers from the sticker were also removed, and I can not make out the last few critical numbers.

So my big question is how in the world can I tell what ECU I have? Is there any internal markings that may lead me to my answer?

What I do know, is that it is D-jet, it has a idle mixture knob and I am running it on a 2.0. My throttle body is a '74, but my head temp is a '73 w/o a ballast (and yes I am having some issues).

Thanks in advance,
-Rob

[tradisrad]

Thanks for the replies,
First how do I know that my TB is from a '74? Well I tried to run the part number (039.133.067) and did not find any matches on the web or in the D-jet Bible, I live near High Performance House and Rich "told" me that w/o the vaccume advance that it is not a '73 and is likely a '74 (the components did come from a '74 car). So while I can not be 100% certain its from a '74, but it is highly likely.....

I have printed the D-Jet bible as well as the MPS characterization and have been reviewing them. With a friend, we measured the inductance of 4 MPS's under vacuum and came up with similar slopes as the "bible" had, however our inductance values were lower across the board on all 4 units. I will check with another meter next week to see if the problem is in the meter. We decided since all 4 were very similar that they are "ok". all were p/n 280.100.043. The "bible" has the 0 in Hg listed around 1.35 henery and all of ours were 1.18 henry (or so).

The head temp sensor I had/have in the car is the 280.130.017, the '73 sensor, the reason I say had is that I am about to go out the the car and place the 280.130.012 sensor in the car.

So I do not have the '73 MPS (280.100.037), but I do have the '73 head temp( 280.130.017)(not for long), and I really want to know what my ECU (brain) is!

I've OHM'd my wiring harness out and all values seem to be in spec. from the ECU connector to the components.

I will keep searching and hopefully the answer will come.
Thanks again and any more help is appreciated, I need CSI 914 to inspect my ECU sticker.
Thanks again
-Rob