One month as new owner of 40-year-old wash. 7 bays, 20-year-old Mark VII equipment. Quite a learning curve. I have 2 bays next to each other which seem the have the same problem. Low pressure for the wand. Reading about 900psi on gauge. Feels very weak compared to the other bays. I noticed yesterday, while operating in high pressure soap or rinse, that the foam gun was also dispensing at a low flow. This is happening on both bays 1 and 2. Any help as what to look for would be most appreciated.