PCV hose broke, car stalled, replaced hose, car still stalling. Smell of gas (rich exhaust smell).
I was driving on the highway uphill, and was on Boost and all of a sudden lost acceleration, I then lost power steering as the car turned off. I pulled over and found the split pipe. It was a small 90 degree breather hose coming out of the crankcase for the PCV system. If you can belive it I had some hose in the car, so I shoved it on without any clamps and got the car home. Since then I've replaced the hose with an OEM part, but the car won't idle properly. I turn the key, it takes more starter motor cranks then it should to get going and then it slowly comes up to its normal idle spe
Experienced mechanics share their insights in answering this question :
Hello. You do likely have a major boost leak or vacuum leak present. Volkswagen’s are very sensitive to any type of vacuum leak. On Volkswagen’s, even if the oil dipstick is is removed it will produce a vacuum leak cause the engine to idle erratically. I suggest that a smoke test is performed on your vehicle by a shop or technician which well help find the leak(s). A different way to test it is to spray starting fluid around your areas where a vacuum leak might be. The RPM’s increasing when spraying starter fluid would indicate that there is a vacuum leak present nearby the area being sprayed.
Please keep in mind that the technicians here at YourMechanic can perform such diagnostics.
You are able to find a technician and schedule an appointment here
https://www.yourmechanic.com
How to Identify and Fix Common car Problems ?
Our sources include academic articles, blog posts, and personal essays from experienced mechanics :
As the PCV valve starts going bad, the performance of your vehicle will get worse. This can be exhibited by a buildup of pressure in the exhaust or the engine could stall out. The bad PCV valve may not close all the way, so oxygen may get into the combustion chamber.
Question: Why do I have fuel coming from my PCV valve? Answer: If you smell gasoline in the oil or fumes going through the valve, possibly the piston rings are too worn and letting fuel pass through. This may happen in a rich mixture condition.
Rough Acceleration: A bad Audi PCV valve may lead to an inaccurate fuel mixture which can cause rough acceleration on low and high RPMs. It is critical to get your vehicle`s PCV valve checked when you notice that your Audi`s engine stumbles when accelerating or attempting to continue driving at a constant speed.
Yes , a PCV valve can cause a engine misfire. A bad PCV valve can over regulate air or often come apart will cause false manifold air leaks that is a unregulated air vacuum leak. False air leaks can cause too lean of a fuel mixture conditions to the engine cylinders to ignite.
Installation position of the PCV valve on the cylinder head. In vehicles with turbochargers, power loss, rough idling, or whistling noises are indicators of a defective crankcase ventilation system, MAHLE Aftermarket reports.
PCV Valve Replacement
If the valve doesn`t open and close on schedule, or if any part of the system clogs, the result can be a rough idle, sluggish acceleration or increased oil consumption.
A clogged or dirty EGR valve may cause the car to emit a strong fuel smell due to the excess hydrocarbons as a result of the valve not working properly and may also cause poor fuel mileage. The EGR valve is a small component designed to allow the flow of exhaust gases into the intake manifold in controlled amounts.
Poor fuel economy can signal the existence of a PCV valve issue. Oil leaks are another sign of a bad PCV valve. When the valve is clogged with deposits it doesn`t allow the blowback pressure from the cylinders to dissipate, over-pressurizing the crankcase and potentially leading to oil seepage.
Disconnect the hose from the intake manifold side and clean off any residue with a cloth. Blow into the hose. If there is some air resistance, the check valve is operating correctly. If there is no resistance, the PCV valve should be replaced.
this could cause serious damage to many parts of the engine. The PCV (positive crankcase ventilation system) valve should not be able to effect the turbo charger or engine in this fashion.
A PCV valve that`s stuck open will allow too much air to enter the intake manifold, leading to a leaner idling fuel-air mixture. Stuck closed leads to a build up of pressure in the crank case which creates a variety of oil leaks! And this in turn can lead to a range of issues, including a rough idle.
A clogged PCV system will cause rough idling, hard starting, poor acceleration, and reduced fuel efficiency.
Common signs include oil leaks, excessively high idle, and a decrease in engine performance, power, and acceleration.
A PCV valve that`s stuck open will allow too much air to enter the intake manifold, leading to a leaner idling fuel-air mixture. Stuck closed leads to a build up of pressure in the crank case which creates a variety of oil leaks! And this in turn can lead to a range of issues, including a rough idle.
The reason why a vacuum leak creates hesitation and stalling conditions in the engine is that the engine is filling with air. The air begins to starve the engine of fuel, and, consequently, you will end up with engine performance issues as a result.
Relevant Questions and Answers :
the most relevant questions and answers related to your specific issue
PCV hose broke, car stalled, replaced hose, car still stalling. Smell of gas (rich exhaust smell).
ANSWER : Hello. You do likely have a major boost leak or vacuum leak present. Volkswagen’s are very sensitive to any type of vacuum leak. On Volkswagen’s, even if the oil dipstick is is removed it will produce a vacuum leak cause the engine to idle erratically. I suggest that a smoke test is performed on your vehicle by a shop or technician which well help find the leak(s). A different way to test it is to spray starting fluid around your areas where a vacuum leak might be. The RPM’s increasing when spraying starter fluid would indicate that there is a vacuum leak present nearby the area being sprayed.
Please keep in mind that the technicians here at YourMechanic can perform such diagnostics.
You are able to find a technician and schedule an appointment here
https://www.yourmechanic.com
Please help me figure out where my PCV valve and PCV Hose is!!!
ANSWER : Hi there. The PCV valve is located on bank 1; the valve cover closest to the cabin. It is usually found under the intake plenum towards the passenger side of the vehicle. The hose will be attached; or loose. Please understand that a code retrieval and an internet search is not a proper diagnosis as there are several other possibilities that can cause the code to set. Some of the possible causes could be spark plugs, ignition coils, intake manifold leaks, intake plenum leaks, vacuum hose leaks, failing airflow meter, failing O2 sensors, exhaust manifold leaks, low fuel pressure, failing ECU, faulty wiring harness, failing injectors, etc… As you can see, the list of possibilities runs on and on. This is where the expertise and experience of a qualified technician with the proper diagnostic tools and procedures becomes invaluable. I strongly suggest having a qualified technician perform an inspection to avoid replacing unnecessary parts and determine the exact cause of the code. Your Mechanic has several available technicians that can assist you with a check engine light inspection.
The car smells of gas, probably has a leak
ANSWER : When an air conditioning refrigerant leak is being detected, a mechanic will often use an electronic leak detector that is specifically designed to ’sniff’ for a specific refrigerant. These electronic leak detectors are also made to detect fuel leaks. I would recommend locating a mechanic that owns one of these electronic leak detectors and enlisting their assistance in inspecting an oil/fluid leak. This would be the best chance at finding the leak considering that is is not large enough to be seen by multiple people.
Gas cap notification and check engine light came on after getting gas. Car started to sputter and stall out.
ANSWER : Hi there. When the fuel cap is not securely fastened to the tank, it can create vacuum issues inside the tank; which triggers the error code to be stored in the ECU. The error will then trigger the check engine light until that code is reset by a professional digital scanner. If you’re still having sputtering or stalling issues, you should contact a professional mechanic to complete an engine sputtering inspection. This will allow them to diagnose what’s causing this problem and reset any error codes to hopefully correct the issue your Chrysler 300 is experiencing.
I smell vapor in the car and the car is starting and cutting right off
ANSWER : A code for the canister close valve will not cause the engine to not run. What would cause the engine to not run, and may be the cause of the fuel vapor smell in the car, would be a leaking/cracked fuel line, a flooded engine with a weak fuel pump, or a damaged wire harness and hose on the fuel pump. A scope of some type would be helpful to visually inspect for any of these possible causes. There should be an access panel under the rear seat cushion that can be removed and allow a visual inspection of the hoses and wiring on the fuel pump.
If none of these are the cause, then an inspection by a qualified technician is highly recommended due to the hazardous material of gasoline being involved. YourMechanic has several available technicians that can assist you with inspecting a smell in the car and provide an estimate and direction of repair.
Soap smell coming out of car after cabin change. Changed filter the the smell is still coming. What to do about this strong smell?
ANSWER : Hi There,
As you know, your car has a cabin filter that serves to filter the air that is introduced to the cabin inside the vehicle. The best way to remove your cars interior ac odor is to use a cleaner that uses enzymes. Enzymes in cleaners kill odors at the source and completely kill the smelly substance material and therefore stopping the a bad smell. To get rid of the smell, try the following: First turn on the ac to full, make sure the “recirculate” button is not on, spray a large amount of cleaner with odor killing enzymes into the EXTERIOR air intakes that are located just below the windshield wipers, let the car run for about 10 minutes with the ac on, after 10 minutes turn off ac and spray the cleaner into the ac vents on the INSIDE of your car. After doing all this, let the car sit for 20 minutes turned off and windows rolled up. Then repeat if the smell is still in the car. By doing this you are killing the bacteria or mold in the car ac vent ducts and also the evaporator mold that may be present.
As you know, your car has a cabin filter that serves to filter the air that is introduced to the cabin inside the vehicle. The best way to remove your cars interior ac odor is to use a cleaner that uses enzymes. Enzymes in cleaners kill odors at the source and completely kill the smelly substance material and therefore stopping the a bad smell. To get rid of the smell, try the following: First turn on the ac to full, make sure the “recirculate” button is not on, spray a large amount of cleaner with odor killing enzymes into the EXTERIOR air intakes that are located just below the windshield wipers, let the car run for about 10 minutes with the ac on, after 10 minutes turn off ac and spray the cleaner into the ac vents on the INSIDE of your car. After doing all this, let the car sit for 20 minutes turned off and windows rolled up. Then repeat if the smell is still in the car. By doing this you are killing the bacteria or mold in the car ac vent ducts and also the evaporator mold that may be present.
Enourmous amount of gas in exhaust and extremely rough idle and car immediately dies after starting.
ANSWER : Hi there, thanks for writing in about your 1998 Nissan Maxima. You should not try and run your car until it is fixed, or a fire may result. Check to see if the fuel pressure regulator is leaking fuel into the intake vacuum line on top of it by disconnecting vacuum line and see if fuel is in it. Replace the regulator if it is and change out the oil and filter after cranking over the engine to get excess fuel out of the cylinders. If you want to have these issues verified, a certified technician from YourMechanic, can come to your home or office to diagnose the rough idling and stalling issues.
Exhaust smell in cabin while idling
ANSWER : Since you just had major engine repairs done and the exhaust system was disconnected and the manifolds were removed then you may have an exhaust leaking into the interior. You should have the a/c on recirculate air and not outside air to see if it helps not pulling n the exhaust fumes. Have the exhaust checked to see is it is leaking and fix the leak. If the dealer says it does not have a leak then have an independent mechanic or shop like one from YourMechanic to recheck the system for you.
