My brother took his HO to the dealer to get the oil pressure guage voltage re-flash done. He called me to say that after he left the dealer, he noticed it smoking alot when he got on it and when he shifted. The truck is stock but My brother runs an EZ on it but takes it off before going to the dealer. He read me the re-flash that they did and it was the proper one for the oil pressure guage. WHAT gives??? Any ideas?