Q: Can I bypass my vapor canister by hooking my lines straight to the intake?

asked by on

Smell gas fumes coming from right fender of car.

My car has 15000 miles.
My car has a manual transmission.

This is likely a sign of a failing EVAP purge solenoid. The EVAP system prevents fuel vapors from the fuel tank from escaping into the atmosphere. The EVAP system collects and temporarily stores the fuel vapors in the charcoal canister. The charcoal canister is filled with activated carbon pellets that can absorb the fuel vapors. When the engine is running, the fuel vapors are purged from the canister and burned in the engine. The vent control valve (solenoid) controls the flow of outside air in and out of the charcoal canister. One side of the vent valve is connected to the charcoal canister. The other side is connected to the vent hose that has a filter or screen at the end and is attached to the car body or frame. In some cars, the vent valve is attached to the canister.

In others, it’s installed separately near the canister. The vent valve is controlled by the engine computer (PCM). Normally the vent valve is open. It closes when the engine computer tests the EVAP system for leaks. If a leak in the EVAP system is detected, the Check Engine Light will illuminate on the dash and the trouble code related to the problem will be stored in the engine computer. Depending on the state you live in, your car may not pass the emissions standards tests if this system is not properly functioning. I would recommend having a professional from YourMechanic come to your home to take a look at your car to properly diagnose and replace your solenoid.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Can I bypass my vapor canister by hooking my lines straight to the intake?

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: My 96 Cadillac Seville is running for about 30 mins and then my oil pressure lights comes on and says "stop engine". I've checked the oil and it's ok.

From what you've described, the problem sounds like you are loosing oil pressure to the engine and the light and noise are indicating that there is a problem. The fact that you are full of oil tells me that the...

Q: My car will not accelerate in speed and there is a knocking noise

Hi there. Usually when you're driving and you notice a loud popping sound, followed by deceleration and troubles maintaining a higher speed, the issue exists within the transmission. However, there are multiple engine components ranging from ignition systems to fuel...

Q: Gas pump continuously shuts off when filling up tank.

The vent hose on the fuel tank to the fuel filler neck is plugged up and is not allowing the air (fumes) to cycle through the system as the fuel is being poured. To verify this, the next time you...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...