My 1985 325e [Picture Heavy]

[Wardie]

late model plastic bumpers and rear apron retrofitted onto an early model is the most aesthetically pleasing combo. It creates the perfect e30 body style in my opinion. Looking good man.

Thanks, seems that the date this is gonna get running just got farther away. Something shorted out on fuse 21. Seem to have took the fuel pump relay with it.

[DER E30]

No haha. But seriously what's up with my megasquirt. When I click then key on without it plugged in to a PC it seems fine. When I plug it in to my PC I can detect it for about 5 seconds then I hear the fuel pump restart up a few times and is no longer detected by the computer.

How are your grounds? Bad grounds will F everything and its always a ground for some reason...

[Wardie]

How are your grounds? Bad grounds will F everything and its always a ground for some reason...

Well I was messing with the c104 plug maybe I plugged it into the wrong one? Then had a weird power surge, relays started clicking. I disconnected the battery and took volt meter to it and started pulling fuses and it was 21. Couldn't fix it with replacing the fuse.

Now my question is what could be the problem? Where would I start looking? What would I look for?

[2mAn]

Id start by looking to see what fuse 21 supports

[Wardie]

I know what it supports, everything inside the car hahaha

[DER E30]

I know what it supports, everything inside the car hahaha

Sounds like you've narrowed down the problem! Seriously though, can you start unplugging things that are connected to 21?

[Wardie]

I mean nothing on fuse 21 works hahahaha

[DER E30]

DOes it have power at it??

[Wschnitz]

Choo choo pics pls.

But really this needs to get done, I want to be jelly.

[Wardie]

There's power, everything worked then I tried to integrate the c104 then something didn't agree. The relays make a buzzing sound. Sounds like it's maybe not getting enough power?

[Wschnitz]

You checked all the obvious ones? like the 2-3 engine grounds, battery, made sure all the right fuses were in, etc?

[Wardie]

Fuses are ok, battery is fine. I'm not 100% on engine grounds. Happened late at night

[Wardie]

I got the one on the oil pan for sure

[DER E30]

There's power, everything worked then I tried to integrate the c104 then something didn't agree. The relays make a buzzing sound. Sounds like it's maybe not getting enough power?

Sounds like the c104 is the problem... Recheck all the things you modded during "integration"

[Wardie]

It was the black and yellow wire, which is the tach n fuel I believe.

Tapped Into the black And white/black.

Would make since it was something fuel related because of the relay going bad. At least I think it went bad.