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View Full Version : Need Help With 2017 L83 Vats WONT RUN


JoeNTX
February 22nd, 2019, 03:29 AM
I've deleted the Vats, applied the patch, disabled the starter relay diagnostic. The engine will start, then immediately shut off like the vats is still active. Any help appreciated!
GMPX
February 24th, 2019, 09:55 AM
Did you do a full flash of the ECM once the patch was applied?
JoeNTX
February 25th, 2019, 03:27 AM
Did you do a full flash of the ECM once the patch was applied?

Yes I did the full flash
GMPX
February 25th, 2019, 09:54 AM
Did you change the starter type?
JoeNTX
February 26th, 2019, 04:28 AM
Did you change the starter type?

G1219 starter relay diagnostic? Yes, I changed it to disabled. This is driving me insane and the customer is getting inpatient
GMPX
February 26th, 2019, 07:53 AM
I'll have a look at the file you posted.
Customers are always impatient, don't stress :hihi:
GMPX
February 26th, 2019, 10:06 AM
Out of interest, have you checked the DTC's after you've attempted to start/run the engine?
Also, these cut fuel and spark for VATS, might be worth a quick look to see if it is cutting spark when it dies, if it isn't then it might not be VATS related.
JoeNTX
March 1st, 2019, 04:23 AM
Out of interest, have you checked the DTC's after you've attempted to start/run the engine?
Also, these cut fuel and spark for VATS, might be worth a quick look to see if it is cutting spark when it dies, if it isn't then it might not be VATS related.

It always has spark, its cutting fuel injector pulse
GMPX
March 1st, 2019, 07:40 PM
Ok so as I was saying, these ECM's cut fuel AND spark when VATS is active.
Did you check DTC's after the engine shuts down?
JoeNTX
March 5th, 2019, 03:43 AM
Ok so as I was saying, these ECM's cut fuel AND spark when VATS is active.
Did you check DTC's after the engine shuts down?

Ok, I triple checked, the ECM is cutting fuel and spark after the initial start. There are no active or pending codes.
GMPX
March 5th, 2019, 07:29 PM
Well, that makes things hard.
I know this method is supposed to work fine, maybe PM the person who posted in this thread to see if their conversion worked just to see if they ran in to any issues, we pretty much did exactly the same thing.
https://forum.efilive.com/showthread.php?28768-Vats-E92&highlight=VATS
JoeNTX
March 6th, 2019, 04:12 AM
Well, that makes things hard.
I know this method is supposed to work fine, maybe PM the person who posted in this thread to see if their conversion worked just to see if they ran in to any issues, we pretty much did exactly the same thing.
https://forum.efilive.com/showthread.php?28768-Vats-E92&highlight=VATS

I've read a few post with 2017 and newer ECM's that state even with the starter diagnostic disabled, they still needed to use a resister with the factory starter relay. Do you have any insight on this?
GMPX
March 6th, 2019, 10:01 AM
I don't have a 100% confirmation on that. It is my understanding that when the ECM is not happy about the missing starter relay the engine will not fire at all, nothing. Turning off the starter diagnostic 'should' eliminate the relay detection from working. I guess it shouldn't be too much trouble to quickly wire something up to check.
It is hard to get a solid answer because of course once someone gets something working it's out the door and on to the next job.
JoeNTX
March 7th, 2019, 03:59 AM
Do you make anything of this? Vehicle theft fuel enabled

22699
GMPX
March 7th, 2019, 08:46 AM
Yeah, VATS is not disabling Fuel is how I read that. Did you put the relay on the starter output to see if that cured it?