ECU and no spark problem

[aeryk7]

Alright so here is my situation my car was running and driveable just needed to do some finishing touches. My friend needs to borrow my ecu so i let him, meanwhile i install my exhaust, in the process i jack the engine up a little to install it easier. I didnt touch any electricals at all and now i get the ECU back and no startup wtf! I check and i have fuel but NO SPARK! So i plug my scan tool and do a scan just in case and i get flashing "E" which basically means no communication with ECU. I tried another ECU which was a silver label so i was sketchy on it. Then i bought another 413 red label again same thing.

So recap i have no spark and my scan tool will not communicate with my ECU. Any Help or suggestions would be greatly appreciated.

P.S. - I have checked many electricals , coils are getting power and battery terminals are tight, Ecu is getting power.

[1990m3]

when you jacked up the engine could it have torn the ground strap from its mounting point?

[SchnellerVert]

Battery voltage?

[asubimmer]

bad chip?

[SchnellerVert]

bad chip?

probably rule that out since he tried two differant ecu's.

[MA325is88]

Bad main relay?

[aeryk7]

bad chip?

Twas the chip , i guess i fried it by putting it in backwards more than a couple of times. Anyway i am currently using a stock 325i chipe now i have spark but no power to my fuel pump. Man now i am back to where i started with my damn ground and relay thread ahhhhhhhhhh!

[Jason89i]

Anyway i am currently using a stock 325i chipe now i have spark but no power to my fuel pump. !

let me guess. you followed one of the wiring diagrams on the internet. NONE of them are correct. grab a voltometer and the wiring diagrams. i have confidence that if anyone puts there mind to it, the problem will be solved ........ you will even find deffiencies (ommissions and mistakes) in the wiring diagrams. jason

[325Projectz]

:stupid:

You'll save yourself a headache.

[aeryk7]

No, the wiring is good. I drove the car around my lot 3 or 4 times. Then i put center pipes on while my friend borrowed my ecu. I got the ECU back then the damn thing doesnt start. So i found out it was my chip . Then i replaced my m3 chip with the stock 325i chip. Now it looks like i have intermittent spark but atleast i have spark. The problem is no power to the fuel pump so back to square one with checking over electricals.

[aeryk7]

Got power to the fuel pump just to find out the fuel pump is seized again. I believe i have some water in my gas tank time ,oh well , time to work the magic on the fuel pump.