smog pump?

[wth1]

have a 02 caravan,failed emissions,gross leak...when i turn off engine it sounds like a air leak at the the smog pump or air pump.unable to find any listing for the part,am i crazy,it is a pump right.anyone have any problems with this issue?is there another name for the pump?any help would be nice...

[RIP]

Do you mean the EVAP system leak detect pump? It's under the van. The connections on it or the EVAP canister are a common sourse for leaks. What area are you hearing the hiss from?

[wth1]

Originally Posted by RIP

Do you mean the EVAP system leak detect pump? It's under the van. The connections on it or the EVAP canister are a common sourse for leaks. What area are you hearing the hiss from?

no this is under the hood,in the back with the drive belt operating it.when i turn it off,it just sounds like air escaping from it,it only takes about 10 secs for what ever it is to drain..(my shade tree mech bro in law says its a smog pump)...

[Bear]

No smog pump on your car, in fact I don't remember a smog pump on any car for years. The only things back by the fire wall that are run by the drive (serpentine) belt are the alternator and power steering pump.

[RIP]

Gotta agree with Bear. It's not a smog pump. Can you post a pic?

[Bear]

Also, tell us which engine, I-4/3.0 V6/3.3 or 3.8 V6.

[jpb53]

Power Steering Pump

[wth1]

ok,yep it is a power steering pump.......traced it myself...now i am not sure if the sound is actually coming from it though...it would not set off a emissions leak.gross code though would it?oh, and it is 3.3 engine....there is a long cyclinder looking thing right by it,is that the leak detection pump?and will they make a sound like (a tire leaking air)for lack of a better desciption..only hear it when i turn the engine off.

[wafrederick]

If a vehicle came from California,has an air pump on it.My father has a 2000 Impala with air pump which has California emissions

[RIP]

Originally Posted by wth1

ok,yep it is a power steering pump.......traced it myself...now i am not sure if the sound is actually coming from it though...it would not set off a emissions leak.gross code though would it?oh, and it is 3.3 engine....there is a long cyclinder looking thing right by it,is that the leak detection pump?and will they make a sound like (a tire leaking air)for lack of a better desciption..only hear it when i turn the engine off.

Here's a pic of the leak detect pump and it's location
http://www.waltech.org/ldp/ldp.htm

[RIP]

Originally Posted by wafrederick

If a vehicle came from California,has an air pump on it.My father has a 2000 Impala with air pump which has California emissions

My 96 Gr Caravan doesn't have one. I bought the van new in California. I've worked on several others in California. None had one. Can you find a parts listing for a smog pump for any 3rd 4th or 5th generation Chrysler minivan? Maybe even a 1st or 2nd gen? I know some antiquated emissions systems still use them. Just not these vans.

[jpb53]

If a 2000 Impala has a smog pump it is because it was a dirty engine from the beginning of the design. The only way to clean up what comes out the tailpipe was to add a AIR INJECTION PUMP. Last Chrysler that I remember to have one was the V10 pickup with a cast iron block eng.

[RIP]

Originally Posted by jpb53

If a 2000 Impala has a smog pump it is because it was a dirty engine from the beginning of the design. The only way to clean up what comes out the tailpipe was to add a AIR INJECTION PUMP. Last Chrysler that I remember to have one was the V10 pickup with a cast iron block eng.

Just a gee wiz question. I know little about these pumps. I've never delt with one so maybe you can clarify. I'm assuming a smog pump and an air injection pump are one in the same. The term "smog pump" is just a tagged term so to speak, correct?

[jpb53]

Yes one and the same.