2016 vz sv6 ecu help needed

[jess2020]

Hi just got a diagnostic done after car ran rough also wouldn't start a few times and wouldn't drive in drive , then after a few Starts drove but really rough, what should I do to fix ?
Please help

 

[Fu Manchu]

Next is to get a diagnostic technician to test those circuits with an oscilloscope. Just because they are there is no indication at all that they are faulty. They are doing their job. It takes some skill to do this, most mechanics won't do it. Do lots of calling round auto electricians and workshops. Might be about $200 for someone to investigate the faults and determine if the parts or ECM is faulty.

If the ECM is faulty, consider a repair, rather than a replacement. You may need to organise further repairs yourself, but if you are armed with more data, its worthwhile and makes things easy for the next person repairing.

 

[jess2020]

Next is to get a diagnostic technician to test those circuits with an oscilloscope. Just because they are there is no indication at all that they are faulty. They are doing their job. It takes some skill to do this, most mechanics won't do it. Do lots of calling round auto electricians and workshops. Might be about $200 for someone to investigate the faults and determine if the parts or ECM is faulty.

If the ECM is faulty, consider a repair, rather than a replacement. You may need to organise further repairs yourself, but if you are armed with more data, its worthwhile and makes things easy for the next person repairing.

Thankyou
Should I just replace throttle body and see if the problem?
I cleaned the throttle with spray , and noticed only sometimes the flap would open ?
Holden trying to charge me $1600 for ecu but if throttle is stuffed that still won't work is that correct?

 

[Fu Manchu]

Firstly, randomly replacing expensive parts is not the way forward. It can easily cost far more than $1600.

If they have said the ECM needs replacing, they should be able to provide the evidence for it in the form of data from oscilloscope readings on the various circuits involved. I'd be asking for that before handing over $1600.

Second is there are businesses that can repair your ECM at a fraction of the price and offer guarantee on their work. You'll find some on eBay. You send it in to them, they fix it. They send it back. You install it. If it was the problem, then it will be sorted.

I would also disconnect the battery at the negative terminal. Remove the battery. Set it aside. Clean the body to earth points. Undo them, clean the nuts, clean the surfaces of the ring terminals and the threaded studs with a scotchbrite or similar. Spray with contact cleaner. Theres an earth behind the battery, one on each cylinder head. One also on the area below the ABS module (drivers side near the battery and the fuses).

Clean the mating surfaces of the ring terminal and ECM bracket on the earth from the ECM. (A 7mm bolt I think from memory)

Get all the earths back on and nip them up tight, but careful not to over tighten.

Then double check you got all the earthing points tightened up.

Battery back in, connect the positive terminal, then the negative terminal.

Give it a go. All going well, problem is solved and cost you nothing but an hour or two of your time.

 

[jess2020]

Thankyou so much
If I send you a picture could you please show me possibly? I'm a chick that's all lol

 

[Fu Manchu]

I just posted in another thread about ECM removal. With photos.

 

[Fu Manchu]

I will get some photos of the earthing points.

 

[Fu Manchu]

*Disconnect the negative terminal on the battery first! This makes everything ok to to touch and undo. Keep it tucked away from the battery.



1. In by the battery. Take the battery out. 13mm bolt down the bottom front holds it in.

Once the negative terminal has been disconnected, disconnect the positive terminal (also a 10mm)

You can see the earth through here

Closer up

And same one close up

 

[Fu Manchu]

[deleted]

 

[jess2020]

Your amazing thankyou so much