I have been getting code P0442 for the last 60 days on my 98 S70 T5. When I research the topic, the most common issue is the J hose that goes to the evap canister. I followed this great you tube video:

http://www.youtube.com/watch?v=lNI3RZXUSaM

I do NOT have a J hose in that location of my vehicle. As I was doing more research, I thought the can may be in the front like my 94 850. I pulled the driver side turn signal and found nothing. When I go to IPD's website, I found out I do NOT have the correct emission code on my VIN for the J hose.

http://www.ipdusa.com/products/7143/114240-evap-hose-c70-s70-v70


Any thoughts on what could be causing this code to be thrown. Any suggestions would be greatly appreciated.

Thank You

1998 was a transition year, early models had the cannister under the left front fender, later cars moved it to the right rear wheel area.

I found a split hose under my fuel filter, visible with the right rear wheel removed.

This is when a home made smoke machine comes in handy, as it is a sealed system.

So please enlighten me on how you use smoke to trace vacuum leaks. I understand using propane to reveal leaks in conjunction with rpm fluctuation, but the smoke puzzles me unless you are somehow force injecting it into the vacuum system to see where it exits.

Thanks!

Rich

The EVAP system is essentially closed and easy to smoke test. We are not talking about smoke testing the intake manifold.

I have no idea what you are referring to. If this was in response to my smoke test question, you totally missed what I was asking.

How do you use smoke to test for leaks? Vacuum, manifold, or otherwise. I have never heard of this, never read about it, never seen it done. I was asking for an explanation of what is being done, how you go about doing it, and what the results show or what you should be looking for.

If this makes for to long of an explanation here, just say so. Thanks again.

Normally, a repair shop will spend several thousand for a machine that pumps smoke into your car's engine or EVAP system to find leaks. These leaks produce error codes or rough running engines.

Smoke is introduced into the EVAP system by unplugging one of the hoses and pouring in smoke under light pressure. They you just look for where the smoke comes out. Not good on a windy day!

Here is an example of a DIY smoke machine:

http://www.youtube.com/watch?v=HRiK2HEA3QQ

Others have made simpler designs using a 2 liter bottle with a smoky thing inside and squeezing the bottle. I like the youtube version as well because you could hook up an electric tire pump (just beware, you do not want to over pressure the system, so leave the pump connection loose).

To check for manifold leaks, just plug it into the vacuum tree and see what happens.

Of course, cigar smoke is not for everyone!

Thanks for the explanation. I learned something new.

Also another good excuse to enjoy a cigar. :)

Check all the vacuum lines and rubber couplers/elbows. My non turbo 1998 V70 had the PO442 code. It always came back within a couple of weeks after clearing. It went away permanently after replacing both rubber vacuum elbows at the canister. My canister is under the drivers side front fender, visible from under the car. The bad rubber elbows looked OK with no cracks, however the rubber was soft and the surface was rough.

So replace any rubber elbows or couplers that dont look new. I used sections of standard vacuum hose - Volvo sells couplers and elbows.

Mike

Mike,

I looked there as well. Even took off the sidelight housing and I didn't see a canister. That was the 2nd place I looked because my 850 has one there. Any suggestions on where to look?

Eddie G