IDI high RPM run away. From crank case vent. 1984 Jetta TD

[GTFORZA]

I was experiencing run on when the engine was warmed up and the oil was thinner. I thought it might be the injector pump but I did some homework and found out the crank vent releases oil into the intake causing run on. I remembering seeing fumes coming from my air filter when I shut it off so I disconnected the hose and it was fixed except the oil getting in the engine bay. I was looking at doing a catch can setup however I found a valve cover oil baffle at http://www.partsplaceinc.com/products/product-detail.aspx?keyword=VW+oil+baffle+026-103-547&sku=1196. I think I might try this before I order a catch can from http://fifteen52.us/shop-2/#!/~/product/category=953531&id=3835746. Has anyone used the baffle for the "run on" issue. Thoughts? Opinions?


Pic of the baffle.


Pic of the catch can.

[damac]

Are you sure it ran away?  If it did how did you stop it?

I had a tired engine in my 85 jetta and I installed that shield, and a self made inline pvc can that had a few stainless steel free flowing scrub balls in it that didn't block airflow.  It had a lower center section, hose barb that connects a hose to a nippled fitting where the previous lower blockoff plate is.

I think thats what vw did as a mod to the system.

I checked my setup out and it did catch some oil but it didn't rid the intake of it, and I don't think that is the ultimate goal, I think it has to collect there a little bit.

I now hook up the extra breather hose/shield to my 2 daily drivers with healthy motors just for the hell of it, no catch can on those.

[GTFORZA]

It's not bad run away it won't hardly rev down when its warmed up but with the hose disconnected it fixes it.

[745 turbogreasel]

Every car should have that baffle, but if you have enough blowby to run the car, you probably have  bigger  fish to fry.

[RabbitJockey]

Add the vent to the front of the block

[shwak23]

Add the vent to the front of the block and then what?

Sent from Outer Space!

[ORCoaster]

Route a hose from the front of the block to a tee that you put in between the hose that goes from the top of the VC to the top of the air cleaner.  This allows those gases in the crankcase to get sucked into the air going to the engine and burn em up.  It was a modification on later VW's.  I nearly did this on mine today but am chasing oil problems first. 

[RabbitJockey]

They added it to aaz and tdi.  Also there was a kit for older cars u could get from vw an it was obviously an issue since be kept changing the size of the oil drains and addin them

[wolf_walker]

Was the pipe from the vacuum pump on the early cars the same kinda thing?

[RabbitJockey]

Was the pipe from the vacuum pump on the early cars the same kinda thing?

No

[GTFORZA]

does anyone have a pic ov the vent setup

[ORCoaster]

Go to Page 130 of this manual.  Save it to some place on your own machine because the information is golden for us old engine abusers.

www.fostertruck.com/Files/VW_diesel_77-83.pdf

Shows it as you would have it for a stock or additional add on.  All you need to do is patch in a hose between your existing vent from the valve cover to the air cleaner box.  Simple tee will do it.  Then run a hose to the hose that comes from the block to the vacuum pump. Another tee in there and you have simulated the function with the simple addition of two tees and a 2 foot piece of hose.  

Ta Da.  

Moderator?  Can or is this pdf on our stickys?  Or FAQ?  

[bajacalal]

What to do if you don't have a vacuum pump connection at the block (because you have the new style vacuum pump). Drill and tap the block-off plate, and install a nipple?

[ORCoaster]

If that is your situation then, yep.  You could also JY a plate that was used by those of us that had the diaphragm style pump shown in the picture.  Drilling your own might allow a smaller diameter fitting and hose to run up to the crossover hose on top.  You would just need a different sized barb coming off the larger diameter sized tee. 

[8v-of-fury]

Moderator?  Can or is this pdf on our stickys?  Or FAQ? 

Okay.