Review on 🛢️ Walbro F90000267 High-Flow 450 LPH E85 Fuel Pump by Jay Kowal

I bought 2 of these pumps for an engine dyno. Both pumps turned on, but the fuel did not pump. I checked the wiring, I correctly connected the plus and minus according to the columns on top of the pumps. Double checked and triple checked to make sure I'm getting the correct voltage and my ground is fine, but nothing. I switched plus and minus and the pump pumped like a monster. Incorrect conclusions about the pump. He worked backwards. The red wire marked + at the top of the pump was actually my ground point and vice versa. My pump has been running for a year now with no problems other than the initial installation. I suspect these are very good CHINESE copies made by walbro, walbro even says it on the case. I don't see how this could pass quality control when they are genuine Walbro pumps. CHECK YOUR CONNECTIONS IF YOU HAVE PROBLEMS THAT THESE PUMPS TURN ON BUT NOT PUMP