Electric issue?

[Sypath]

Hello

Just bought a stage 2 M5 Competition facelift, however im having this weird problem when i try to give it full throttle or take a hard corner it cuts of power and the dash resets itself and gives me alot of malfunktion codes, these codes goes away after a few seconds. Feels like the car shuts down the electronics

Ive checked the battery and also tried another battery that i know is good but had the same problem, checked the voltage on alternator and shows 14.7 - 14.9V. Checked the ground cables that goes to the battery, ECU boxes and also the ground that is near transmission but all looks fine. Im starting to run out of ideas and my mechanic has no idea what the problem could be

Anyone had similliar problem with their M5? Will try posting a video on all errors that i recieve

Appreciate all help and sorry for my bad english

[M5Rick]

If there is no immediate solution you can always remove the tune and see if there's any change.

[Craze]

Sounds like dme not plugged back

[Sypath]

Im still having this issue, bought a brand new alternator thinking it was the problem but didnt change anything still having the same problem

Anyone had simillar problem with their car?

[M5_Raz]

Some members had similar problems (myself included). Turned out to be loose connections to the ecu. Check that everything is tight, including the ground wires.

[Sypath]

Can the GHAS module trigger fault codes and reset instrumment panel?

[M5Rick]

It's unlikely alternator is the problem, you have stage 2 tune so have you changed the sp/plugs for colder ones (if you drive it with gusto) recently and adjusted the gaps to suit. Standard gap is .032 and ppl on here are taking them down to .024 with these tunes.

[Sypath]

Originally Posted by M5Rick

It's unlikely alternator is the problem, you have stage 2 tune so have you changed the sp/plugs for colder ones (if you drive it with gusto) recently and adjusted the gaps to suit. Standard gap is .032 and ppl on here are taking them down to .024 with these tunes.

I dont think it has anything to do with the spark plugs, the car feels like reseting itself, power cuts out then it send alot of fault messages.

[bgalex]

Did you figure out the issue on here? Im having similar issues. Low voltage - Voltage supply faulty, i have 0 problems int he frist 2 minutes of turning the car on ACC mode but after 2 minutes i get faults and if I start the car it shuts off after 10seconds....

[Sypath]

Originally Posted by bgalex

Did you figure out the issue on here? Im having similar issues. Low voltage - Voltage supply faulty, i have 0 problems int he frist 2 minutes of turning the car on ACC mode but after 2 minutes i get faults and if I start the car it shuts off after 10seconds....

One of the engine mounts were bad.. cables going to exu was damaged cuz of the movement from the engine

[bgalex]

Originally Posted by Sypath

One of the engine mounts were bad.. cables going to exu was damaged cuz of the movement from the engine

Thanks for the quick reply, my car only starts and stays on for 10-15seconds and cuts off.

Voltage issue on ISTA - I just cant seem to figure out wehat else it could be

Brand new battery, I have IBS sensor on order maybe thats causing a fault and sending wrong signals to all the computers? Im mind blown how it happened out of nowhere...

[KurtsM5]

Originally Posted by Sypath

One of the engine mounts were bad.. cables going to exu was damaged cuz of the movement from the engine

Wow, that sucks.

[M5Rick]

Originally Posted by Sypath

One of the engine mounts were bad.. cables going to exu was damaged cuz of the movement from the engine

Oh man that's a b'tch of a thing to happen.