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Post by DrewNukesEm on Jun 29, 2009 15:15:21 GMT -5
So it seems to be a common FI problem.. The "L" shaped piece on the intake tube is easily broken off when removing the intake.. Even if you know about the fragile part and try to be careful (like I did) it can still break (like mine) haha.. Anyways, looking around here and talking with stacks I decided on what i felt was the best solution for me.. - To cap it off, here's a practical 'sine wave' solution to a common PCV problem for us FI owners, also note the stock sparking plug wires and sparkling engine bay! stacks Stacks, please explain your PCV mod to us technically-challenged individuals...i.e. me! Sure. If you ever remove the plastic black intake hose thingy(on top of valve cover), you run the risk of cracking it's delicate plastic 'side fitting' which feeds filtered air into valve cover. Here's a shot of the broken off piece; 2 inches of hose and a tiny, busted nipple. The broken intake is cut off and sealed with a bolt and sealant. The hose reaches over to air filter box where another unused nipple was waiting for this moment. There's lots of ways to skin a cat, look up lowryder or subaju for other solutions. A before/after pic would be helpful here stacks I thought that maybe you set up some sort of filter/collector for the oil/water mix that gets trapped in the PCV valve... Sorry to dissapoint, RM. No magic here, just a piece of hose. stacks Edit, The heater hose pictured above split at rocker cover, another solution below uses the back PCV tube from another motor with a 5/8" hole drilled in intake. So what I did was cut the "L" piece off and plugged it using a black rubber plug from a hardware store.. I also got some brass nipples with threads on it. I drilled a 1/2" hole in the intake where it starts to bend, and used one of the brass nipples to thread the hole, then backed it all the way out and used a nipple with teflon gas tape on the threads and tightened it into the intake. Then I used a heat resistant fuel hose (6" about) and plugged it on to the nipple on the intake. And installed.. And a before and after..
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Danimal
Getting my two Justys back together after a Justy hiatus.
Posts: 589
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Post by Danimal on Jun 29, 2009 18:09:52 GMT -5
Nicely done! Great photos.
-Danimal
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Post by pwave on Sept 18, 2009 9:50:56 GMT -5
mine also broke is it alright to leave it like it is ?
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tbagg
little AK monster
Posts: 200
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Post by tbagg on Sept 21, 2009 12:03:10 GMT -5
my kinda temporary fix. Thats until I find something I like better, cause its not very clean, but functional still. works for me! Attachments:
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SeattleJusty
No, a boxer will not fit in a Justy.
Posts: 1,587
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Post by SeattleJusty on Sept 21, 2009 13:09:47 GMT -5
That almost looks better than the factory design.
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Post by eporter123 on Oct 5, 2009 14:11:20 GMT -5
So, adding the small filter to the valve cover will vent crankcase gases and add pollutants to the air. (Just did some reading on the turbo justy oil catch can thread)
I imagine that blocking the PCV port on the intake will reduce oil going into the engine and help improve emissions. I'm a little high on my HCs, and need to pass, so this might help for a quick fix?
There's not much oil going into the engine from the PCV, but on a PPM level, it might help pass?
Then I'll put the hose back to stock!
What say ye?
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Post by eporter123 on Dec 1, 2009 16:00:34 GMT -5
Hey, so here's my modified PCV FI solution. I did not do this, I bought the car like this. However, it works fine, so I haven't messed with it!
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Post by spiked3cylinder on Jan 5, 2010 12:53:53 GMT -5
Is there no PCV valve for the fuel injected models??? I don't see that little screw in valve on the back of the intake manifold - like I did with the carbed Justy I had.
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Post by RedRooJusty on Jan 5, 2010 16:32:06 GMT -5
Sure there is. As designed the PCV circuit goes to two places by throttle position:
1. When throttle body is near closed @ idle, intake manifold is pulling a vacuum and PCV valve is actively pulling away crank case gasses.
2. When the throttle body is opened up (the vacuum of the intake manifold and the intake ducting are about the same), the spring load of the PCV valve will hold it shut and the crank case gasses will route through the intake ducting.
-RRJ
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Post by spiked3cylinder on Jan 5, 2010 18:32:56 GMT -5
Ok then. Where is this valve?? How can it be accessed to be changed? And why can I not locate one through the local auto stores: Napa, Kragen, Autozone, pepboys, etc. They tell me there is not one to order.
On my 88' Justy is was readily available for order through any auto retail store.
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Post by Quidam on Jan 5, 2010 18:58:04 GMT -5
Hi,
Looking at your engine with the hood up, the pcv valve is on the left lower corner of the intake manifold. Left of the throttle body, front side of the engine.
I got my last two pcv valves at RockAuto for a buck each.
Doug
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Post by RedRooJusty on Jan 6, 2010 3:39:38 GMT -5
Ok then. Where is this valve?? How can it be accessed to be changed? ........ I shamefully stole this image from **DrewNukesEm** to illustrate the PCV valve location.-RRJ
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Post by spiked3cylinder on Jan 6, 2010 12:55:14 GMT -5
Thanks Guys!!!
I shall check into RockAuto and get this replaced.
Anyone know the consequences of a bad PCV valve?? What can is cause?? Just curious.
Also, anyone know a recommended change interval?
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Post by Quidam on Jan 6, 2010 18:01:06 GMT -5
Hi,
If your pcv valve is clogged, your engine won't vent properly. If it's stuck open, it will vent all the time.
Doug
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Post by RedRooJusty on Jan 6, 2010 20:48:03 GMT -5
Anyone know the consequences of a bad PCV valve?? What can is cause?? Just curious. Long version: @ idle: A stuck open PCV valve would lean the idle mixture and the EFI computer would enrich the mixture to compensate = uses a touch more fuel to idle. @ idle: A stuck closed PCV valve would let the crank case gasses vent to the intake ducting = no harm. @ cruising speed & rpms: A stuck open PCV valve continue to lean the air/fuel mixture and the EFI computer will have to compensate with enrichment = more fuel consumed. @ cruising speed & rpms: A stuck closed PCV valve not have any effect when the throttle is opened up, but when you let off the throttle the intake ducting gets a "blow" of blow-by gasses. The PCV lines also go from vacuum "pulling" away the gasses to being momentarily pressurized with excessive blow-by gasses (also oil will tend to be pushed out of any and every seal on the engine, because the whole crank case builds pressure as well). *note*- I mention cruising speeds with the correlating revs to be 3000~5000 rpms.Short version: PCV stuck open = Your car will use more fuel than it should (this includes the carb'ed cars as well). PCV stuck closed = Your car will blow/seep/drip oil out every engine seal when you let off (close) the throttle. - I can't find a reference to replacement intervals, I will keep looking -RRJ --edit-- Since this PCV valve is cheap, I would just change it when doing a regular tune-up.
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Post by spiked3cylinder on Jan 8, 2010 13:21:19 GMT -5
Thank you, thank you, THANK YOU RedRoo!!!
Great description, very clear and easy to understand...any chance a PCV could cause both of these problems - stuck open and closed. Perhaps if it is just super gummed up???
thanks, Adam
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Post by papcina on Aug 25, 2010 5:14:16 GMT -5
hi
okay, just noticed on my 94' 4wd 1.2 efi justy that this part is broken... it was even before but probably the previous owner tried to glue it with some kind of silicone... anyway, now its broken again... as soon i get spare time i'll fix it as you mentioned, but still have a question. could this broken hose cause an idle rpm of 1000-1100rpm when hot, 1500-1900rpm when cold? cos someone here on forum wrote me an idle rpm should be around 800rpm...
thanks
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Post by RedRooJusty on Aug 25, 2010 11:48:38 GMT -5
hi okay, just noticed on my 94' 4wd 1.2 efi justy that this part is broken... it was even before but probably the previous owner tried to glue it with some kind of silicone... anyway, now its broken again... as soon i get spare time i'll fix it as you mentioned, but still have a question. could this broken hose cause an idle rpm of 1000-1100rpm when hot, 1500-1900rpm when cold? cos someone here on forum wrote me an idle rpm should be around 800rpm... thanks *** papcina***, I think you might want to visit the idle timing to fix this. I believe that most mechanics forget to read the emissions tag under the hood. I did a brief write up on setting the idle timing in "Test Mode": subarujusty.proboards.com/index.cgi?action=display&board=trouble&thread=3104&page=1 Check the timing and let us know if that fixes your fast idle. -good times -RRJ
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Post by Cañon Carver on Oct 18, 2012 12:16:02 GMT -5
Here is mine I blocked off the broken hole with a Justy lug, sealed it with silicone, and then I ran it through a catch can. PCV vents to open atmosphere right now.
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libero
Libero E-10 & Justy J-12
Posts: 22
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Post by libero on Oct 26, 2012 23:21:28 GMT -5
My solution:
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