Q: Car dies if I let off gas pedal

asked by on February 04, 2016

My car will not keep running. If I give it gas, keeping it above 1,500 RPMs, it runs good. If I let off of the gas pedal, it dies.

Car is stalling Inspection $79.99 - $89.99 Get a Quote

This is a common problem that I run across frequently on this engine. The most common cause of this is a bad intake manifold gasket. When this occurs it create a large vacuum leak that makes it hard for the engine to idle. It can also be caused by a number of other issues, but this is the most common. A mechanic would typically do either a smoke test of the intake manifold, or would check the fuel trim readings with a scan tool to see if there is a sign of too much air entering the engine. The smoke test would show the leakage and the fuel trim reading would show too much air entering the engine. I would recommend having your stalling issue diagnosed soon so that you don’t find your vehicle stuck out there on the road.

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

What others are asking

I have a 2001 Saab 93 turbo automatic and it keeps stalling. Once it does, I have to wait about 20-30 mins to restart.

Hi there. Check the spark plugs and see if they have been replaced. The plugs in your engine are designed to last between 80,000 to 100,000 miles. Replace the spark plugs if they have not been changed. If the symptom...

F-150 loses power while trying to go reverse

Fix your exhaust and coil packs first, because if you'd want to get everything running right and your exhaust is leaking, that messes with your air flow out of the exhaust, which makes the oxygen sensors respond weirdly and can...

Is it safe to switch from 5/30 weight formula Shell oil to a synthetic oil to store for the winter?

Hi, thanks for writing in. You should not need to change the oil from the 5/30 you have in order to store the car for the winter. I would recommend filling the car up with fuel and having the tire...

The headlights wont shut off and the horn keep honking when I turn them on.

It sounds like you have a rubbed through wiring harness or two. All the components you mentioned are switched on the ground side. That means if there is a short to ground on the switch side before the relay, then...

Car hesitating and shaking.

A lot of things could cause the problems you are having from a vacuum leak to a idle air control valve. My best advice is have your vehicle diagnosed firsthand but a trained professional, such as one from YourMechanic.

Major Leak of power steering fluid

Hello...it sounds like you have a loose or faulty hose connection. Of course, it is also possible that a coincidental leak developed, for instance in a rusted steel tube on the return side, at the same time that you were...

Vehicle turns off at any rpm, at idle or highway speeds, without stumbling or warning.

This kind of a stalling issue can be caused by a variety of problems. They are typically caused by ignition faults, wiring faults, and fuel issues. Although you do not have a Check Engine Light on, you should still scan...

Ignition problems with my car

It sounds like your battery is no longer strong enough to accept a full charge. When the engine is running and the alternator is charging, if the battery does not receive this charge it will have the same state of...

Rough idle, stalls when accelerating, engine shuts down while driving with no fault codes.

Hi there. The issue is the coolant thermostat temperature sensor. The sensor is malfunctioning causing the computer (ECM) to think that the engine is either too cold or too hot and causing the fuel mixture to be off. I recommend...

Related articles

How to Re-Start Your Second Generation Prius
Nobody Nobody wants their car to suddenly stop working. Unfortunately, Toyota recalled around 75,000 of their 2004 Prius cars because of some technical issues that were causing them to stall. This could be caused by several different failures in the...
Symptoms of a Bad or Failing Cylinder Head Temperature Sensor
Common signs include long cranking time, engine performance issues, and the Check Engine Light coming on.
How Long Does a Throttle/Accelerator Pedal Position Sensor Last?
The The throttle/accelerator pedal position sensor detects the position of the accelerator pedal. This information is then transmitted to the vehicle’s computer - the engine control module (ECM). From there, the data is then sent from the computer to the...