I have a 460 ford E-350 (motorhome)that will stall on occasions and only when it is warmed up. The engine will start and run great at first but after 2-100 miles the engine will stall when slowing to a stop. It starts right up after the stall and will drive again. In a either a few minutes or miles the stall can happen again or will keep driving to my destination. Also after sitting the stall will be gone till the next trip. After stalling the engine will start easily but idle rough. When in stalling mode once the rpms are up above 1K the engine runs and accelerates great. Going up hills is not a problem. Last year I had some work at a shop for other problems. They replaced; EGR valve, plugs, computer and fuel filter. The fuel pressure is 32 at the rail (42 when pressure regulator is dc). The egr valve operates with a vaccum activation. I have a vaccum gauge in the cab indicating good steady vaccum when driving. Also there is a code 334 (EVP sensor is/was high-EVR) pulled. I'm not sure if the code is significant. Any suggestions?
Wednesday, October 10th, 2012 AT 11:22 PM