Greetings gentlemen. bothering you from Russia. can't solve the problem with the client car for 2 weeks. in order: disconnected the battery (+ terminal) welded and installed the exhaust system. after 4-5 days the battery was connected. they started the car, listened for two minutes, drowned it out, checked a couple of points visually, after 10 minutes they tried to start and the car did not start. the starter turns, there is a spark, the injectors and the fuel pump do not work. the diagnostics showed no errors, through the diagnostics the injectors and the pumps are triggered. checked all fuses and relays. changed the battery in the keychain, charged the battery, filled up the gasoline, the car does not start.
sometimes, the immobilizer indicator lights up randomly. sometimes, gasoline appears arbitrarily in the fuel rail (without pressure) the fuse box was dismantled, everything is fine there. the alarm masters did not find any problems with the immo and the key fob there is only one keychain. the official dealer refused to help, because they do not know how. All 5 foremen who examined the car said that everything was in order with it, and the car did not start.the diagnostic master went through the control units, did not find any errors or failures.
options: 1. a secret is installed, about which the owner does not know. I don’t know how to search. 2. there is something wrong with the immobilizer. I don’t know how to find out. 3. The car was blocked from theft, but we don't see it. I don't know what to do. 4.problem with ecu, but diagnostics does not see
the client and I are in complete despair that we do not know what to do next. I will be extremely grateful for any information or hints thanks in advance

 

See if this video helps.

 

Sounds like a vats issue. Try resetting the battery again but if that's not working you can turn off the vats with HP tuners. I'm sure most tuning products should be able to do that as well.

 

thanks for your attention and thoughts.
solved the problem yesterday.
it turned out that an additional fuel pump control unit (magnuson) was installed on the car.
installed near the ecu, found by accident.
one contact is badly burnt.
cleaned, brought everything back to normal and the car started.
in my practice this is the first time, I think that the contact was heated for a long time and went out of order in my garage.
I doubt that due to welding it could burn out badly. What do you think?

 

a secret just like you thought it could just be coincidence, and was burning out...

the only other thing would be the welding... maybe somehow you got too much voltage in the system?

thanks for the update!

-drew