Skip the auto shop - Our mechanics make house calls

Q: Trouble starting, misfires, dies when you let off the gas.

asked by on

The car only starts when the gas is pressed, as soon as you let off the gas, it dies. Has new spark plugs and fuel filter. I bought the car from a guy that had it sitting for almost 3 years, its driving fine for about 2 months. It died a couple times, but started right up so I didnt think to much about it. It started dying a lot of stops, so I changed the fuel filter. It got worse. Sounds like a bad misfire. I was almost home yesterday and it got real bad, it died and wouldn't start till I held my foot down. Got about 50 feet down the road and the top radiator hose blew, but then the car ran fine. Thankfully I was less than a block away at that point. Any ideas? I have a video of what it does when I start it also. Please please please help me :/

It sounds like you have a real bad vacuum leak. After you replaced the radiator and hoses to get it running again check all the vacuum hoses to make sure there is no broke hose.

If you find there is no broken hose, then check the distributor cap for oil in it and misfiring marks in the cap or on the rotor. If you need further diagnosis, then have a qualified technician, such as one from YourMechanic, come to you to test the systems and diagnose your misfiring issue.

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

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: Stalling after cold starts and problem with lights

It sounds like you have a sticking idle air control valve that frees up after the component warms up. The valve may be able to cleaned if there is a great deal of carbon build-up inside the valve. As...

Q: How do you remove the front passenger door side panel when the door is locked and can not unlock?

Hi John. Thanks for contacting us today. I don't think it's possible to remove the door side panel if the door is locked. Usually a locksmith will have to unlock the door manually to permit repairs to be completed. ...

Q: i can't remove my clutch, brake, gas pedal assembly

For this job in particular, my best advice would be to hire the hand of an experienced technician. The assembly takes a certain amount of manipulation and persuasion to get out properly. There may be a few extra hidden fasteners...

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 Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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.