CODE P1580 OBDII BMW Mod 99

I have problems with a BMW Modl-99 with Code OBDII P1580 Code says that accelerator body is mechanically attached. This system is cable, the engine is normally well minimal but when it is accelerated, it begins to make cuts of injection and there is power. I already checked the gas prection and this normal one in 50PSI Functs Clean Ultrasound, I changed the full accelerator body and the problem insists I check the cable harness is OK, if someone with experience can give me a hand is appreciated beforehand ...

According to a codes table that you can decarge is P 1580 mechanically stuck butterfly valve. Greetings and luck