Intake system clogged?

[khl]

99 F350 7.3 The check valve? on the side of the intake air box pegs to "replace filter" and its yellow inside. I push button to reset it but it just says replace filter once I go driving again.

I put in a Fram CA9676 filter (severe duty) but it still does it. Is the indicator just bad, wrong filter or could there be something else wrong?

[ttyR2]

Check the upstream air path and see if something before the filter is plugged.

[khl]

Originally Posted by ttyR2

Check the upstream air path and see if something before the filter is plugged.

I checked it (runs to front grille area) To check it I took the whole pipe off from air filter housing to grille. No clog but I left it off, check valve says filter is good/no clog now. Been this way for 2 weeks. Odd...

[jesilvas]

Any tuner/chip? Pulling huge loads?

[khl]

Originally Posted by jesilvas

Any tuner/chip? Pulling huge loads?

Stock. Just pull around trailer/Bobcat. Since removal of the pipe from airbox to grille, check valve stays in green