Skip the auto shop - Our mechanics make house calls

Q: Evap system problem

asked by on

When the engine is cold it starts right up. After it gets to operating temperature if I shut it off, ex. Getting gas, I try to crank it, it sits right back off. I have to hold the accelerator and hold until rpm gets to normal range. When this happens and it stays running the rpm will go up and down by 200 to 300 rpm. New maf sensor, tps sensor, coil packs, even fuel filler neck. My scan tool shows "evap system vent door circuit open". Do you think a new vent door solenoid will do the trick? Please respond at djanarking. thank you very much

My car has 155000 miles.
My car has an automatic transmission.

A: It sounds like you have a problem with the ...

It sounds like you have a problem with the vapor vent purge valve. Check the valve to see if it will hold vacuum when not energized or if it leaks and needs to be replaced. The valve leaking will cause hard starts and rough running until the excess fumes are cleared from the engine. I recommend checking the system by a mechanic to diagnose the car's stalling problem for you.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Tools to replace a radiator and fan

Hey there. You will need mostly basic hand tools - a ratchet, sockets, wrenches, pliers, screw drivers. The only problem you might run into is bleeding the cooling system of air after performing the replacement. Since this radiator does not...

Q: Changed brakes and rotors now the emergency brakes is squeaking when driving. What could be wrong?

Hey there. As you may know, your emergency brake is operated and controlled by a separate drum brake assembly located behind the rear disc brakes. The emergency brake is operated by a drum brake set up with brake shoes that...

Q: Something locked up the wheels

Hello. I would recommend having your suspension and brakes checked. This will include removing the front wheels. With the wheel removed, it will be much easier to determine what the actual cause of the lockup is. The lockup may have...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...