1G ecu question

[cheap90gsx]

I recently purchased a 'rebuilt' ecu. it looks like it was rebuilt but when i looked closer at the board its corroded and looks bad. i was looking for some re-assurance that this ecu was rebuilt properly. also, will the corrosion hurt the board? should i try to clean it? and, the heat sink was removed and i need to know if that will effect anything??

 

[yokotabrat]

I can't tell if that's corrosion or just the flux residue leftover from soldering. Either way, though, I wouldn't run that ecu without the heatsink. It's there for a reason. Also, I don't like the through hole ceramic caps in place of the surface mount ones, but that's just me being picky.

 

[cheap90gsx]

so i didn't get screwed? my car isn't running and i have to leave feedback for this product and i don't want to give them good feedback if its junk? i paid $50 for it. and the corrosion is all over the board not really around the caps just wondering if there's some solution to this corrosion building up. thanks.

 

[yokotabrat]

It's not a good rebuild if they forgot to put the heatsink back on.

I don't know how much margin there is in mitsu's design, but without a heatsink, the injector drivers or the regulator could potentially fail. I've never measured the temps so I can't be 100% sure. It's risky to run it without that.

If the residue is white and it's all over the board, it could just be the reaction flux-off tends to have with the conformal coating on the board. That is harmless even though it doesn't look pretty.

Do you have a 90? That doesn't look like a 90 ecu.

 

[tkelly27]

That looks a little poopy. It probably won't be hard to clean it off. You can also probably get the heat sinks from a NT ECU from the junkyard. I'd give both jobs over to a local TV repair guy, or for some extra insurance, send it out to the ECU rebuilders on the site. Probably won't be more than $10-25 to get all that back on. A working turbo ECU for $50 is not a bad deal at all.

If you have a 90 and it's not a 90 ECU it's going to be bad times.

 

[cheap90gsx]

the ad claimed it was a 90 ecu but when i got it i saw that it's not. it looked more like the one i had before which was a 91 ecu. so this isn't a 90 right?

 

[yokotabrat]

The number on the connector (6578M) proves it's NOT a 90 ecu.

 

[tkelly27]

http://www.dsmtuners.com/forums/art...4-ecu-swap-into-1990-dsm-ignition-wiring.html

converting a 1990 to a 1991-1994 ecu system

Pick your poison. My car ran with just switching the wires, and when I went back to a 90 ECU everything worked. I can't tell you if just switching wires damages anything, but it does start and run just fine.