buggered ecu maybe?

[leggyfreak]

past couple of days my car has been dying one me and when it does all the relays seem to go apeshit and car wont start i have unplugged ecu and opened it to c if anything was fried all is good there so i plugged it back in and car started first pop did it again so i unplugged ecu plugged it back in and same as before it started firt pop

any ideas on what could be cauing my car to die and for the relays to start going nuts

[suubyduuby]

So all the relays are chattering? Check ECU harness for a poor/faulty 12V rail connection. Any signs leading up to the failure? Done any work on/near the harness recently? Anything that may have spiked the 12V rail in your car damaging the ECU (would seem unlikely though)?

[leggyfreak]

yea realys just go nuts no signs just happened

only work done on my casr latly was in the weekend did a gear box change could it be somthing to do with that

and how do i cheak the 12v connection on the rail?

[Guest]

have you checked all your earths? just a guess

-smurff

[leggyfreak]

na not yet mite cheak them 2moro just needed peoples ideas so i cant going thru to figure out which it is

[suubyduuby]

 leggyfreak said:

yea realys just go nuts no signs just happened

only work done on my casr latly was in the weekend did a gear box change could it be somthing to do with that

and how do i cheak the 12v connection on the rail?

Trace the +12V wire into your ECU - make sure you have got a solid 12V (actual will vary 13-14V depending on battery condition and whether car is on or not). Check it with a multi-meter.

As smurf also pointed out, check your earth connections. From main battery, to ECU, main harnesses etc

If you did a gearbox change, think about anything you might have touched electrical or before that, anything you might have done which could have led to the problem.