Thought I had everything ready...

[mazur]

You should have one thicker wire (maybe 1/2'' or smaller) that comes off the harness and goes to ground...though it's possibly different on the OBDII harness.

[Jean]

That just means it was either a battery arcing, OR if it was bad and you smelled something burning or something did burn you might have connected something to cause a short circuit (grown to positive for example). when a fuse blows you normally don't hear it ;)

"Upon further investigation the ECU was burnt/fried right where it was grounded" picture of this.

good luck!

double check everything.

[87e30]

Just double checked all the positive wires hooked up to the power...

You guys are right, I had the ground hooked up to positive.

I found two thin (relatively) brown wires that I hooked up to the power. WEird thing is one thin one is brown and one thin one is red/brown. They are both wrapped up in the same bundle and have one connection crimped on the end of them. I assume this is the ground, just confused why one has a rd stripe.

[Jean]

That would do it :) Hopefully you didn't fry any wires if you disconnected it right away... if it was a ground wire you connected to positive then the rest of the harness should be OK (I hope), since you created a short circuit with a ground wire, but don't just take my word for it and check the rest of the wiring.

So what happened to "Upon further investigation the ECU was burnt/fried right where it was grounded" ??

[87e30]

That would do it :) Hopefully you didn't fry any wires if you disconnected it right away... if it was a ground wire you connected to positive then the rest of the harness should be OK (I hope), since you created a short circuit with a ground wire, but don't just take my word for it and check the rest of the wiring.

So what happened to "Upon further investigation the ECU was burnt/fried right where it was grounded" ??

That's all... the ECU had a burn mark on the edge of it where it bolts into the bracket and the bracket had a burn divet too. Both small. I literally touched the battery and pulled it away so fast.

How do I check the rest of the wiring? Most of the harness is exposed and nothing looks bad... I can look more closely.

I've checked all fuses and all of the new wiring that I've done. (not alot, like I said I bought a premade harness just had to wire in the EWS stuff which was complicated for me but not a lot of wiring)

I assume I just plug it back together (once I check over everything connect that ground I mixed up etc) and hope for the best as far as the ECU working.

[Jean]

So the ECU/bracket was connected to the engine harness but was resting? I am thinking when you connected the battery terminal it shorted through the ecu case/bracket it almost sounds like....

You'll just have to inspect the wires with good light and cross your fingers that the magic smoke was kept inside your ecu ;)

[87e30]

So the ECU/bracket was connected to the engine harness but was resting? I am thinking when you connected the battery terminal it shorted through the ecu case/bracket it almost sounds like....

You'll just have to inspect the wires with good light and cross your fingers that the magic smoke was kept inside your ecu ;)

WEll the e36 ecu doesn't fit into the m20b27 ecu bracket. So I bent the bracket back and had i lodged in there (temporary, not to drive of course) so it was just slightly grounded. And right at that small point it's kind of burned/fried. Oh, and correct, the harness was connected to the ecu.

I'll look over all of the wires tomorrow morning and make sure I don't make any more quick/stupid mistakes tonight as it's late and I don't know what I'm doing.


God I hope it's all going to work...

I hate being inexperienced, but only one way to learn. I got

[2002maniac]

oops! sounds like you've got a fried wire or two.

[87e30]

oops! sounds like you've got a fried wire or two.

I should...

Would they be inside the harness or...?

I've looked quickly time to go inspect it right now.

[mazur]

If you really did take the power off quickly, I doubt you fried any wires. Even the small ones need several seconds to start smoking/ melting.

[87e30]

Okay,

I corrected the ground. Checked over everything, and plugged in the battery this morning.

No weird noises and cabin lights are working.

Now to add oil to the motor and see where I'm at!

Thanks for bearing with my guys.

[87e30]

And now I have no start. :(

[lennon]

got fuel or spark, or neither? starter turning? do you have a swap thread? im interested in your m52TU swap. is it aluminum block?!

[Jean]

Check the fuel/main relays, see if you are getting spark and/or fuel... confirm you have the fuel in/out lines correctly hooked up to the rail. Might also need to borrow another ECU if all fails since you did hook up wiring incorrectly...

[87e30]

It's not aluminum block or anything, straight from an e36.

Hopefully it's not the ECU... That is in teh back of my mind though.

The starter turns and I'm getting fuel. I'll have to check for spark.

Also wondering if something with the ews is keeping it from starting.

Also don't have an fpr hooked up... should that keep it from starting? I've been on teh search for an obd2 one.