Is it OK to pressure wash the PowerMax?
– NO! The PowerMax is water resistant, but not waterproof. When the rail pressure harness is connected, the truck runs bad, misses, and surges. The rail pressure connector might be hooked up backwards where the stock harness connects to the TST harness. The stock harness connector will have a clip on it with a thumb tab to press when removing the connector. This clip is designed to keep the connectors from coming apart by snapping over a stub and it needs to connect to the correct side of the TST rail pressure harness connector. The stub on the correct side will be tapered so it is triangle shaped if you look at it from the side. The stub on the wrong side is not tapered and is oval shaped if you look straight down on it and rectangle shaped if you look at it from the side. If you still have problems after making sure the connector is on right, then check the TST rail pressure harness to make sure it didn’t get wired backwards. To do this, disconnect both ends of the TST rail pressure
