I have a hitachi 200-3 that will pull down and stall the engine. Moving a function will relieve the engine, but once the functions are back to neutral the engine pulls down and smokes. Dr zx says code 22 abnormal pump control. I manually destroke the pump then once started the pump angle matches the angle signal. Gradually the angle increases while the signal is telling it to lower. I have replaced the angle sensor, rpm sensor, and pvc. The dp sensor is also less than a year old and it has two new solenoids. The machine started out going into modes where it would work fine most of the time and occasionally go into a slow mode. Now all it does is go into the pull down. I have had mechanics work on it without any luck and now I'm trying to figure it out. Hopefully someone can help me out since it seems this is a common problem, but I haven't seen where there's been a solution. The only ideas I have would be the dp although I'm 99% sure it's not since it's nearly new and I have swapped one from another machine. The other thing would be the wiring but I am getting voltage to the solenoids. Thanks in advance I'll be very grateful for whoever can help me fix this headache.