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Enes, Volvo Master Technician
Category: Volvo
Satisfied Customers: 5590
Experience:  18 yrs+. experience as Volvo & ASE Certified Master Technician.
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, I disconnected (very stupid thing to do) and then reconnected

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I disconnected (very stupid thing to do) and then reconnected the electrical wiring from 2 injectors while the engine was running. Now the car starts on 2 cylinders only. The two where I disconnected and reconnected the injector wirings are not firing.
How can I "restart" - "reset" those 2 injectors?
I unplugged the battery and plugged it again but the problem is still there.
It's a Volvo V50.
Enes : Hello and welcome to our web page here my name is***** a Certified Volvo Car Expert Mechanic.I'm going to try today to answer your question.
Enes : you must use volvo scanner reset all ecu parameters and fuel trim and adaptation
Enes : that will bring car then to normal mode most time
Enes : but only with volvo scanner no other way
Enes and 2 other Volvo Specialists are ready to help you