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

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: Q: Car losing RPMs and stalling.

There are many variables that go into diagnosing a problem like this. To give you some ideas things like low fuel pressure, an ignition module failing, a clogged catalytic converter among many others can cause symptoms like you are describing....

Q: My engine is running too lean

Hi there. The high octane gas should not cause this; the new air intake definitely could, though. With more air entering the engine, the computer sensor readings are going to be thrown off. I would recommend that you first make...

Q: Car is making a loud noise coming from the air box because when u apply a little pressure the noise goes away and I just got a new

Hello, thank you for writing in. You are absolutely heading in the right direction. If you were to look at a diagram of the filter housing you would see it simply runs to the vents up front. If you can...

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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...