Random rough idle issue

[Greenfistlol]

Hey guys, been having a random drop in idle sometimes only when it gets warmer outside like 70+ when the weather is cool doesn't seem to happen at all i definitely need to replace my purge valve assembly becuase it does the same after filling up on gas but wasnt sure if its related any ideas? Plugs were changed about 10k miles ago as well.

 

[JJ_FiestaST]

Yep it’s the purge valve. Mine idles great after the change and was exhibiting the same behavior as yours prior.

 

[FiestaSTdude]

Mine is doing weird idle things right now as well, I just keep forgetting to get a purge valve lol

 

[Sprinkle_Star]

This happens after a fill up for me, so I just hold revs at a high idle RPM if I'm stopped at a light. It seems to only last about five to ten minutes following a refueling.

 

[Sam4]

Now assume it affect performance - fuel mileage, 0-60 times.....