skydancer

hello,

i have a 2009 Ford F150 with a (W) 4.6L engine SCSB 2WD. Only has 70000 miles on it. Mint condition and clean. Lately i have had it just stall ( die out) when sitting and idling. It does start right back up and runs perfect? this has happen 3 times now in the last 5 weeks. No codes, Nothing shows up on the obd2 with live info running. Throttle body is clean, MAS is clean, no vacuum leaks, has new sparkplugs. did it before and after new plugs. Engine purrs and idles at 530 rpm in gear. No surging except sometimes when it goes to stall and it doesn't it catches itself and the rpm raises for a second then settles right back down.

Any experts out there seen this issue or can direct me in the right direction. Could it be a fuel pump relay? fuel pump? Is there any other electrical items that can cause this? i want to find it before it goes completely out and strands me. thank you

ji603

Could be your evap purge valve in the engine bay. Could also be fuse 27 in the engine fuse box, although that is usually fail to start/crank no start

skydancer

thanks, i will look into the evap valve.

Spiky

Starting in 2018, that's a feature, not a bug.