Smog pump/air diverter valve

JGANAWAY

MEMBER
1993 FORD F-150
4.9L
6 CYL
4WD
MANUAL
280,000 MILES

I've read online that there is a filter for the smog pump but I can't find anything saying if there is one and where it would be. The smog pump is also make an intermittent roaring noise, as if the bearings are going bad. Is the filter the same as the air diverter valve, also, what is the part number for the air diverter valve?

3 Replies

KEN L

MASTER CERTIFIED MECHANIC
48,363 POSTS

There is a filter but it is part of the air diverter valve. Here is what it looks like in the diagrams below so you can find it. Check out the diagrams (below). Please let us know what happens. When this valve goes out it can make the air pump make noise.

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Tuesday, May 25th, 2021 AT 10:24 AM

JGANAWAY

MEMBER
42 POSTS
1993 FORD F-150
4.9L
6 CYL
4WD
280,000 MILES

Is there a filter for the smog/air pump and where would it be. Also, is there a way to repair or clean out a diverter valve or does it have to be replaced?

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Tuesday, May 25th, 2021 AT 11:28 AM (Merged)

KASEKENNY

MECHANIC
18,907 POSTS

There is no filter on this system. Basically if there is an issue with the pump then it needs to be replaced.

I am attaching the info below on this info. The diverter valve also should not be cleaned out as it could damage the internal components.

If you have an issue with any of these then we need to replace them.

Please run through this info and let us know if you have other questions. Thanks

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