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Diagram of vacuum line to pvc valve - 1999 Oldsmobile Alero

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Why does car die when removing oil cap and how to fix it


Hi Matt:
There is a good possibility that your PVC valve is not functioning, so when you remove the oil cap. the vacuum line is letting way too much air into the carb/ontake manifold.
My suggestion?
Clean or replace the PVC valve.

Sep 21, 2015 | Cars & Trucks

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Vacuum hose routing diagram


It goes to the Pvc system. Usually onto a valve cover

Aug 06, 2013 | 1995 Mercury Mystique

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Does the mazda 626 2.0 liter 1991 model, have a pvc valve


most do its usually located on the top of the motor and has a vacuum line hooked up to it..

Feb 15, 2013 | Cars & Trucks

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Having vacuum problems


check the vacuum line that goes to the fuel pressure regulator,pull the vacuum line off ,if there is fuel in the line ,the regulator has ruptured.

Jan 01, 2012 | Ford Cars & Trucks

1 Answer

How to check pcv for vaccum leaks


The lines going to the PVC are what you would have to remove and check with a Vacuum pump or Vacuum source. Close off one end with your finger and apply Vacuum to the remaining end.
The engine and its cavities produce a Vacuum pressure when the engine is running to draw in vapors from the oil system. Therefore any hose connected directly to the PVC valve will vent through that system so you will need to test the parts off of the engine.
The PVC valve is a cheap part and usually does not break between replacement intervals. Because of the spring valve inside this part, it is to be replaced at intervals just like an air filter.

Dec 30, 2011 | 1998 Buick LeSabre

2 Answers

Can brakes stop workin if pvc valve is bad


not normally however they both are attached to the vacuum system , the brakes have a booster which is run off the manifold vacuum, and so is the PVC valve,, I would check for any vacuum leaks in the system, and replace the PVC valve,, they are cheap

Oct 03, 2011 | 1996 Honda Civic

1 Answer

Oil leaking from under the oil filler cap. Suspect clogged PCV valve and/or flame arrestor. WHERE are they, and HOW do I get to it/them?


240 /740 Engine In between #s 3 & 4 fuel injector you will see a rubber cover on the PVC valve which is plastic. Prise out the rubber cap then remove the plastic insert there is a plastic diffuser there about one inch across this will be blocked. Remove it and replace it The actual rubber tube from the Crank Case to this plastic insert There is a form of Vacuum line attached to it also. I would replace the rubber tube also as they usually go very brittle after all the years of service and simple disentergrate. Clean the diffuser which will be blocked as sure as eggs, if not, as above replace it. Its another PIA but it should have been done during one of the Planned maintaince services. When removing the Vacuum line off the PVC valve, be careful not to break it This engine loves vacuum lines to be 100%.

Apr 19, 2011 | 1990 Volvo 240

1 Answer

Engine light lit ... pvc valve issue?


REMOVE PVC VALVE WITH VACUUM HOSE STILL ATTACHED CHECK FOR VACUUM AT PVC VALVE PLACING FINGER OVER IT.IF NO VACUUM FROM PVC VALVE BUT THE HOSE TO PVC VALVE HAS VACUUM REPLACE PVC VALVE.IF NO VACUUM GETTING THROUGH PVC HOSE AND VALVE.LOOK FOR DISCONNECTED BROKEN VACUUM HOSE OR OBSTRUCTION IN VACUUM HOSE BLOCKING OFF VACUUM.

Aug 05, 2010 | 2008 Chevrolet Suburban

1 Answer

I can't remember how the vacum hoses were hooked up on a 2000 grand prix with 3.8 engine. The only thing I am having a problem with is the california emmisions at the rear of the engine there is the vacum...


IF YOU TALKING ABOUT PURGE SOLENOID VALVE.WITH TWO VACUUM LINES TO IT.LARGE VACUUM HOSE GOES TO GAS TANK EVAPORATIVE CANISTER OTHER SMALL LINE GOES TO PVC VALVE ON VALVE COVER.YOU HAVE A EMISSION VACUUM HOSE DIAGRAM UNDER THE HOOD.

Jan 30, 2010 | 2000 Pontiac Grand Prix

1 Answer

I need a vacuum line diagram for a 300 straight 6 The motor is also building up pressure and causing blow by is there a solution


Check your PVC valve. It is suppose to vent the blowby. But if your rings are failing, then you will get a lot of blowby.

Jul 25, 2009 | 1984 Ford F 150

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