Hi Scotty, my truck idles like crap on days when it's humid and wet outside. All will seem fine and the RPMs dive bomb out of nowhere. Sometimes it stalls. The next day it will be 100% smooth. I don't…

awegner176

Hi Scotty, my truck idles like crap on days when it's humid and wet outside. All will seem fine and the RPMs dive bomb out of nowhere. Sometimes it stalls. The next day it will be 100% smooth. I don't understand what this could possibly be. 2016 F150 with the 5.0 V8. Throttle body is clean and has been recalibrated several times, air filter is changed very frequently, gdi intake cleaner is used every oil change, fuel trim looks good. New plugs didn't help. Any help would be greatly appreciated. Coil packs are original with 80K miles.

Comments (3)
No. 1-3
RadienMayakovsky24
RadienMayakovsky24

Changed the Fuel Filter then do a Pressure & Volume test of Fuel Pump, as well as Cleaned out all Fuel Injectors

Scotty Kilmer
Scotty Kilmer

Editor

weak electronics are effected by humidity. So check all connections and things like spark plug wires or fuel injector wiring

skip029
skip029

I'd guess the fuel filter.