smog pump?

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Sep 17, 2012 | 09:18 AM

Nick bass

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smog pump?

I am sure we have visited this topic before but i couldnt find anything for it on here, smog pump. What in the world does it do. from what i can see their is only one line going into it, looks more like a vacum pump to me but their is nothing powering it, so its got me a little confused. new to diesels sorry. any help would be appreciated.

Sep 17, 2012 | 09:20 AM

Nick bass

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i forgot to mention it is a 1990 7.3, non-turbo

Sep 17, 2012 | 09:50 AM

bashby

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From: Charles Town, W bygod Va

No smog pump on these, there is a belt driven vaccum pump. Is that what you mean?

Sep 17, 2012 | 10:53 AM

Nick bass

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yea thats gotta be it, guess i was misinformed on that one. so is their any type of recurculation system on this engine?

Sep 17, 2012 | 11:24 AM

bashby

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From: Charles Town, W bygod Va

Just the cdr valve. It is similar to a pcv valve

Sep 17, 2012 | 01:19 PM

Nick bass

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and where is the cdr valve located? is it the bell house looking part on back of intake?

Sep 17, 2012 | 01:56 PM

bashby

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From: Charles Town, W bygod Va

Looks like a tuna can on the back of the intake

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Sep 18, 2012 | 11:00 AM

Nick bass

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i have noticed the vac reservoir and assumed that it was for cruise control considering theirs not much that's vac controlled on the truck. well thanks that took care of my emission questions. but while on the subject. does anyone know what the vacuum solenoid on passenger side of truck up in very corner controls? squirrels or mice have managed to eat thru that line but i havent noticed anything different.