1gn VC on 2gn

heydockyle · Post by **heydockyle** » Mon Aug 30, 2010 4:27 pm

For anyone that has a 1gn VC on their 2gn. Are you running the whole 1gn pcv system?

03blackrt · Post by **03blackrt** » Mon Aug 30, 2010 10:40 pm

What do you mean “whole 1gn pcv system”?

Since there is no place to thread in a 2gn PCV valve into the 1gn cover, your kinda stuck adapting a 1gn setup.

Here’s what I did…

The 2gn cover has a 1/2" straight nipple coming out for the rear vent with a rubber 90 elbow connecting it to a 3/8” hard line. The 1gn cover has a 3/8” 90 degree nipple coming out for the rear vent. I removed the 90 degree elbow and cut the stock 2gn line to clear the 1gn valve cover and connected the nipple and hard line with 3/8” inside diameter rubber hose.

The 1gn uses a 1/2" nipple on the valve side. I connected that with the 1/2” crankcase side of the 1gn PCV valve with a length of 1/2" inside diameter rubber hose. The valve has a 3/8” nipple on the vacuum side, so I slid that in the 3/8” in side of the rubber elbow from the rear and slid the 1/2" side of the rubber elbow onto the 1/2" nipple on the Magnum intake mani.

Post by **occasional demons** » Mon Aug 30, 2010 10:44 pm

And if you've got a '95 VC, you are going to have to add a hole to it.

gtxtreme19 · Post by **gtxtreme19** » Tue Aug 31, 2010 7:50 am

Might I ask why your using a 1gn vc?

heydockyle · Post by **heydockyle** » Tue Aug 31, 2010 9:24 am

Help keep the PCV from dumping oil into my intake manifold and me having to clean my map sensor every other month.

And blackrt okay thanks. Thats what I figured just getting an idea.

Post by **occasional demons** » Tue Aug 31, 2010 9:52 am

Even with the normal vapors from the PCV you will get crap in the IM. It's just a fact of emissions life. Been that way since the 1950's. The only thing was before MPI, the fuel kept the IM cleaner.

heydockyle · Post by **heydockyle** » Tue Aug 31, 2010 11:45 am

I have a puddle laying in my im

Post by **occasional demons** » Tue Aug 31, 2010 12:27 pm

I used to have a puddle too, but a catch can cured that. But the inside still gets the black goo from the vapors. That is what's still going to gum up the MAP sensor.

My point was, the VC isn't going to help that.
There really is no feasible cost effective solution. Other than the occasional IM cleaning.

Have you looked at IM's from other engines? Nothing but black nastyness inside them. If they have EGR, it is even worse. Unless you find a way to filter it out, there is going to be carbon/oil film build up. But it is better than leaving it in the crank case.

heydockyle · Post by **heydockyle** » Tue Aug 31, 2010 12:43 pm

Yea I realize the map is going to get dirty regardless. But this will help me from having to clean it as much. The puddle in the bottom gets onto the map too, not just the vapors.

Post by **occasional demons** » Tue Aug 31, 2010 2:19 pm

You must have some wicked stuff coming out of your crankcase. I have yet to touch my MAP sensor (other than swapping it between IM's). 9 years and counting. If it is that bad, I would remote mount it with some brake booster size tubing. It would be totally out of any contamination.

heydockyle · Post by **heydockyle** » Tue Aug 31, 2010 7:18 pm

I've had to clean it twice because the car would start then shut right off. Start and run pig rich blowing black smoke until I held it off the limiter then it would quit.

And when I clean the map It fixes it so I don't think its just a coincidence.

Post by **occasional demons** » Tue Aug 31, 2010 7:55 pm

A bad TPS will do that too, just sayin'. I would do the vacuum line thing, and run it for a while to see if the problem returns.

I just replaced the TPS in my Jeep. Was idling weird, stalling, running rich, revving at closed throttle. No CEL/code. It would do this every now and then but it was never long enough for me to start unplugging stuff to figure it out. As soon as I unplugged the TPS, it straightened out. Next time, just unplug the TPS, and see what happens. It will idle fine without it plugged in. Just don't do any rapid throttle moves, or you may get a nasty IM backfire. (I know this.

)

You will get a p0123 code/CEL by unplugging it. But if it is sending too high of a voltage signal for the throttle position, it will dump fuel.

INVUJerry · Post by **INVUJerry** » Tue Aug 31, 2010 8:30 pm

Do an exhaust evac.

Post by **occasional demons** » Tue Aug 31, 2010 8:38 pm

lol, there is always that. Wouldn't one of those reed valves be needed (they used for air injection on the early catalytic converters) to prevent positive pressure from coming back into the crankcase?

For reference purposes only: http://www.gadgetjq.com/rv_removal.htm

Post by **racer12306** » Tue Aug 31, 2010 11:16 pm

And you just have to watch for them to rust out. I couldn't believe it when one on my dad's racecar just fell off in a burnout.

Guess New York rust attacks everything, even cars that are stored away from snow and salt all winter.

heydockyle · Post by **heydockyle** » Wed Sep 01, 2010 9:59 am

I know the iac will cause it to. But I don't touch the iac. Only the map and it fixes it.

Post by **occasional demons** » Wed Sep 01, 2010 12:21 pm

There is nothing the IAC motor can do to make it run rich. Just idle too high, or too low. The only indirect influence it has on fuel, is when it opens, the o2 sensor sees it leaning out, so it gives more fuel to match the air, thus the idle raises. And vice versa.