Skip the auto shop - Our mechanics make house calls

Q: I have trouble starting the vehicle every time I put gas in the car

asked by on

This is a ongoing problem, I say about 6 months now... I have trouble starting the vehicle every time I put gas in the car. It does not matter if I fill it up or not, just stalls. Only after I put gas in the car I have starting problems, after that the vehicle starts normally with no problems. I changed the purge valve with a new one and it work once with out hesitation. After that, I changed my gas cap with a new one and I'm still having starting issues. I used to push the gas pedal to the floor prior to starting and that worked for a couple months, but now that stopped working. I haven't change my fuel filter as of yet. I'm just afraid I will get stuck at the gas station.

Thanks, Angelo

My car has 218000 miles.
My car has an automatic transmission.

A: As you may know, this issue is commonly rel...

As you may know, this issue is commonly related to the evaporative emissions (EVAP) system which is comprised of a few components, one of which you have already addressed, the purge valve. In some cases, when you have an air leak in the EVAP system, then the manifold absolute pressure (MAP) sensor will not be able to determine the air density, and the mass airflow (MAF) sensor will not be able to correctly determine the volume of air entering the engine. This will lead to an over-fueling or under-fueling situation depending on the size of the air leak and the engine's operating speeds and load. This could eventually lead to destroying the catalytic converter as well. I would recommend having an expert technician, such as one from YourMechanic, take a look at your car to diagnose your starting and stalling problems.

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: Car troubles

When you say locked up, do you mean the engine stalled or just turned off? When you turn the key on without starting the truck do you hear a faint whining sound from near the gas tank? A crank no...

Q: RPMs jumps at idle, & sometimes stalls when gas applied after a stop at alight or sign and won't restart for a minute or so

Hello. A stalling issue like this may take some time to figure out. If you suspect your fuel tank is dirty, you may want to drop it and inspect it. However, these symptoms are more likely to be related to...

Q: I need to replace the abs module. How does the wiring harness disengage from the module?

First, replacement of the ABS control module is a big job that requires opening up the hydraulic system and bleeding the brakes afterwards. I recommend having this task performed by a professional, such as one from YourMechanic. If you're sure...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.