PCV Issue
Thread Starter
Racer
Joined: Mar 2007
Posts: 275
Likes: 1
From: Cincinnati Ohio
PCV Issue
Hey all. I have a bolt on 03 Z06 and my PCV hosing essentially fell apart causing me to throw codes and not run so great. I fashioned up some hosing using 3/8 fuel line and some elbows along with a new PCV valve, but it still isn't running great. Car has stalled 3 times today alone, mostly when coming to a stop. No one carries the PCV assembly around here and Chevy wants ~$140 bucks for it, but would need to order it. I am in a bind as I am driving the car daily so looking for some advice on a fix. Thanks all!
Instructor
Joined: Sep 2010
Posts: 242
Likes: 0
From: Topeka Kansas
Pcv
Need pictures of what you are talking about. The PCV line on your car shouldn't be an issue if you replaced it. My car is a 97 with the old style PCV system and valve. I was told by a reliable source to use Transmission coolant line for a replacement because fuel line breaks down with oil.
Burning Brakes
Joined: Mar 2010
Posts: 1,189
Likes: 4
From: Freeport, FL
Do you still have vacuum leaks? Is that what you are trying to repair?
Fuel or Transmission line is acceptable. Even old school breather systems have worked for many many miles using heater hose.
The Z06 just uses a couple short pieces of hose though, doesn't it? From the valley to the TB; and from the valve cover to the TB, right?
Should be a pretty easy fix.
Post pics of your issue though, maybe we can help.
Fuel or Transmission line is acceptable. Even old school breather systems have worked for many many miles using heater hose.
The Z06 just uses a couple short pieces of hose though, doesn't it? From the valley to the TB; and from the valve cover to the TB, right?
Should be a pretty easy fix.
Post pics of your issue though, maybe we can help.
Race Director
Joined: Dec 2000
Posts: 19,304
Likes: 85
From: San Diego CA
Need pictures of what you are talking about. The PCV line on your car shouldn't be an issue if you replaced it. My car is a 97 with the old style PCV system and valve. I was told by a reliable source to use Transmission coolant line for a replacement because fuel line breaks down with oil.
Thread Starter
Racer
Joined: Mar 2007
Posts: 275
Likes: 1
From: Cincinnati Ohio
Ok so here's the setup I rigged together to try and make this work. Picture is below. The car will idle fine, both hot and cold temps. Problem is once you touch on the gas and the RPMs go back to idle, it wants to stall out (RPMs drop to 3-400 before catching itself). Occasionally it will stall out completely like when the defroster is on. Hope this helps as this is driving me nuts.
Tech Contributor
Joined: Dec 2006
Posts: 10,962
Likes: 29
From: Van Buren Arkansas
Wounded Warrior Escort '11
BTW, the GM hose assembly is just that, an assembly. It routes all the way from the driver's side valve cover, around the back of the engine and then to the passenger valve cover and then finally to the PCV hose. The assembly contains the PCV valve too.
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Thread Starter
Racer
Joined: Mar 2007
Posts: 275
Likes: 1
From: Cincinnati Ohio
Thread Starter
Racer
Joined: Mar 2007
Posts: 275
Likes: 1
From: Cincinnati Ohio
Race Director
Joined: Dec 2000
Posts: 19,304
Likes: 85
From: San Diego CA
...not always true. If you are using emissions line hose (or almost any other type of hose that is made out of an elastomer material, the rubber loses plastisizers over time and will allow leakage, even under vacuum pressure conditions. There are some types of fittings that do not require clamps ut the ones pictured are not that type. I know because I've been working with vacuum systems for more than 20 years. Always use a clamp unless the fitting and hose are designed to be used, clampless.
Last edited by Dave68; Mar 11, 2011 at 10:22 AM.
Thread Starter
Racer
Joined: Mar 2007
Posts: 275
Likes: 1
From: Cincinnati Ohio
Update on the issue. Took the car to my tuner and after fashioning a better setup than I had (probably wasn't very hard) the issue went away. Computer showed the car was being choked due to lack of air moving through that setup. Good to go. Thanks for all the help!
Melting Slicks
Joined: Jul 2009
Posts: 2,487
Likes: 0
From: China Grove N.C.
Changed my pcv hoseing out today mine was dry rotted in 3 places, 1 at the elbow on the driverside rear valve cover 2nd was broke into behind intake and 3rd end of the hose that the pcv valve goes in, NOW I gotta clean up all the oil..!
NEW ONE
NEW ONE
Tech Contributor
Joined: Dec 2006
Posts: 10,962
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From: Van Buren Arkansas
Wounded Warrior Escort '11
Drifting
Joined: Apr 2007
Posts: 1,517
Likes: 159
From: Lafayette Louisiana
