inkslinginmofo77

I had this issue. Hard to start after gas fill ups at times. Rpm’s jump erratically at times, stalls, loss of power etc. Went through 6 different purge valves. Most shops use aftermarket brands so I took a shot in the dark and went to a ford dealer and bought a ford OEM purge valve to make sure it was factory and I haven’t had a problem since. Make sure yer using a FACTORY oem purge valve. Something to do with latency and PWM signal. But since using motorcraft OEM ford purge valve it has completely went away. Not venting tank vapors efficiently back into engine can flood or starve it depending on how well it works with the engines ecm. So OEM. Make sure it’s whats in there! hope it helps.