Hello everyone,

I would like to replace the pcv system in my 1995 850 non-turbo, but can't seem to find the kit for it anywhere. Could anybody point me in the right direction?

Thanks,
Alpha Perez

 

http://www.fcpgroton.com/volvo850oiltrap.htm

This should get you started in the right direction

 

Welcome to the forum, I hope you find it helpful.

Call FCP Groton before placing an order for the kit, someone has noted that the illustration or the parts number on their page are backward.

Good luck,


JPN

 

Thank you guys.It looks like that waswhat I was looking for. Do you thing I'll need anything else that is not in the kit? Other than the manifold gasket.

 

That should do it for the pcv job. Call them as was said and get your parts needs squared away up front before you order. Nick at FCP is very knowledgeable about what he sells. There was some confusion on another forum over the drawing as JPN had said, at one point, (to me),it seemed like two different individuals that did the job might have been confusing each other over how they did it and the FCP drawing was in the middle of the mix. Just make sure you put it back together the same way you took it apart

 

i'm in the same boat, i'll let you know how mine goes

 

Hello everyone,

I did the replacement job and I am not surehow successfull it was. There is, I think, more fumes coming from the dipstick. The car is idling funny, it haskind ofa heavily breathing. I was so concerned I had done something wrong that I took it all apart and put it back together again. That did not work. I am very discoraged with the end result.

Is there anything I might have done wrong? I know that this service was overdue, could this have had permanent effects?

 

Hello Green850,

Did you end up changing the PCV on your Volvo?

Alphaperez

 

Alphaperez,
Yours sounds almost like a vacuum leak if it is idling funny. That or if you disconnected the battery the ECU needs to relearn its programming. Did you replace the elbow vacuum tube on the end of the intake? Those things are always in bad shape. As for the smoke from the dipstick, mine did the same thing even after replacing all the PVC stuff and making sure there were no blockages. I have chalked it up to bad rings even though the engine still runs fine. In talking with Tech, he has seen this before and they continue to run fine for another 200k miles. I just leave my dipstick raised up a little to relieve the pressure and prevent blown seals. A catch can and venting to atmosphere is another thought. I am in the midst of finishing putting mine back together after pulling the engine so I may see if my "meticulous reassembly" has solved the smoking dipstick problem. Most of the engine bay is back in, hose and wires to reconnect and I will know. As for yours, maybe run a compression check and see if you are getting ring blowby. Look for a vacuum leak for the rough idle and maybe let the computer relearn if you removed the battery. Don't have the procedure for the relearn but someone will chime in I am sure.

 

i'm doing it this saturday, all the parts came in


so hopefully every thing goes fine, the last thing i need is more problems

 

Thanks Rob,

Your thoughts on the fumes coming out of the dipstick were reassuring. I drove it today hoping that the bad idle wouldget better, but it did not. There are a couple of things I would like to add. One is that there is slight pop coming from around the muffler that is related tothe bad idle, and the other is that the air coming out of the exhaust smells almost like a popped firecracker. "I know it sounds very odd."

The main reason I replaced the PCV was because the car would die sometimes when I would come to a stop. Since replacing it, the car does not seem to want to stall, but theuneven idle that had existed before the replacement has grown tremendously. I guess maybe I had two problems and I have only solved one so far.

Thanks

 

Hi Alphaperez,

Your engine is running too rich at idle. Unburned fuel is igniting along the exhaust line. This is not a good thing for modern cars with catalytic converter. The engine oil is also likely to get diluted with fuel.

When was the last time the car has had a good tune-up? I would also check the EGR valve and clean the throttle body. Check the air filter, dump a large bottle of Techron fuel system cleaner, etc... Read the "Routine Tune-up Items" write up I left in the following thread: https://volvoforums.com/m_48928/tm.htm

Also, see if there are codes stored in the ECU. Since your 850 is '95, you can do this manually.
http://volvospeed.com/Repair/a2.html

I hope this helps.


JPN

 

Triple check your vaccum lines. Or even better, install new ones. When I cleaned my PCV one of the hoses cracked. The middle one on the BCS started popping out of the nipple. That caused the car to idle horribly.

 

JPN,

I was reading some of the other post, and I think it might be theEGR valve. All of the vacuume hoses were replaced when I did the PCV job. I also had another look in order to see if I had connected the hoses right. It looks like I did.

About the EGR valve, before I did anything to the car I did notice that the hose that goes from the EGR valve to the regulator above the fan had a tear on it. The hose was replaced, but I never saw it make a difference. I know that the EGR valve is pretty expensive. Is there any way I can clean out the part, or is there any way to successfully block it off like I have heard on other post?

Thanks,

 

Yes they are expensive.

You could try cleaning it, but it seems to require removal of the intake manifold, in which case you'd need the manifold gasket upon reassembly.

The original owner of my 850 also blocked the EGR off; he screwed in a bolt at the end of the hose[8D]. No performance problem by doing it, unless your state requires emissions inspections, in which case your car mayfail due to NOx high level.


JPN

 

Hello,

I cleaned out the EGR valve today and that did seem to make a difference. Theengine now does not shake vigorously, but idle is still missing and still smells the same. The enginedoes sounding a lot better, and it accelerates better than before. Should I just go ahead and dish out the $200? What about the O2 sensors, I have not replaced those? Would they cause the idle to be too rich as well?

I have already replaced the fuel relay, idle control valve, spark-plugs (but no wires or rotor), fuel filter, cleaned the throttle body, ATF, added Fuel injector cleaner, and some of the techron stuff suggested. One thing I have not done yet is check the codes. I will do that as soon as I get a chance. A long time ago I had a check engine light, checked the codes and it did say something about the O2 sensors. I never replaced them because the check engine light when off.

 

I would still do the wires, cap & rotor.


JPN

 

Whenever working on a vehicle, the FIRST thing you have to do is check the codes if the check engine light is on. That will point you to the actual problem, instead of perceived. The 850 I got last friday has the check engine light on. I had it checked out, O2 sensors, which I can live with. Kind of expensive to replace ~$200 from fcpgroton for aftermarket ones, but they are easy to replace.

to answer your other question, YES, the O2 sensors will throw off your fuel injection system completely. These sensors are what measure amount of oxygen in the exhaust and tell the ECU how much more or less fuel to inject into the combustion chamber. If they aren't working properly, you may be running lean or rich, but however you are running, it will be wasting gas.

 

i did my pcv system on saturday, and everything seems to be working great

i did not replace my egr vavle, but it was incredibly gunked up and the hole leading to the intake manifold was completely closed shut

so i took the egr valve off and cleaned it with some pcv cleaner (powerfull stuff), and after replacing the pcv system and some vacume hoses (a couple were completely closed shut) my job seems to have gone perfectly

no more smoke or presure out of the dipstick, and my oil leak has slowed down dramaticly

 

Congrats!!!!