Revised IWE?!
Chances are it's not the IWEs. It's the check valve:
https://www.f150forum.com/f118/grind...rating-396572/
https://www.f150forum.com/f118/2017-...ations-402811/
https://www.f150forum.com/f118/grind...rating-396572/
https://www.f150forum.com/f118/2017-...ations-402811/





