Q: When I press the gas pedal the engine revs but the car doesn't accelerate. Is this a throttle or transmission issue?

asked by on October 23, 2016

Car started hesitating with acceleration at times nothing routine. Then yesterday car started making a noise and the gas pedal no longer accelerated. If I turned off and on it would go slowly and stop again. It starts fine. When put in drive and press on pedal the engine will rev but doesn't always go. Or go very slowly with rpms going high.

My car has 69000 miles.
My car has an automatic transmission.

Throttle Body Replacement $267.08 - $1836.29 Get a Quote

Hi there. From what you are saying it sounds like there is a failure in the throttle body. When the motor in the throttle body fails, the throttle plate will open and close causing the noise you are hearing. I usually monitor the movement of the throttle to see if this is what is occurring. I then scan the computer for codes to see what comes up. If there are not any codes then the sensors in the throttle body should be monitored to see what is going wrong. If you want to have this lack of throttle response checked, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose and repair your throttle body issue.

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


Experienced Mechanic?

Earn up to $70/hr

What others are asking

Clicking sound while driving after having transmission rebuilt twice on a 2004 Chevy Trail Blazer
Unfortunately for you, you've had your transmission rebuilt twice at the same shop. So, obviously, they didn't do a good job the first time and I'd be kind of leery about it the second time. If I were you, I...
Opinion about Chinese-made Volvo that is being shipped to the USA
I wouldn't buy a Volvo (https://www.yourmechanic.com/scheduled-maintenance/volvo-s60/) because I'm not a fan of European cars. They have a tendency to be over-engineered and their parts cost a fortune. They need special computers to work on them. They generally make them so...
Can shaft position sensor all of the outcomes of the problem
Possibilities: 1 - Simply replacing the camshaft sensor (https://www.yourmechanic.com/services/camshaft-position-sensor-replacement) will solve your problem. 2 - If it does not, with the age of the vehicle, there can be a break in the wiring harness to the cam sensor. 3 -...
When stopped at traffic light. My car hesitates and pops in the engine compartment unless you hold down the gas pedal.
Hello there, many faults will cause a popping noise in the engine compartment of your 1998 GMC jimmy. You have done well replacing the spark plugs, wires, cap, and rotor. If the problem is still there after all those repairs...
Car will not start or crank - 2005 Mazda 3
Rodent damaging wiring can sometimes be more extensive than first appears. Previous experience tells me that there can be more than the one wire you found damaged. Wiring throughout the engine compartment should be thoroughly inspected for damage. Not only...
TRANSMISSION PROBLEM
Hi There, What you are describing sounds like possibly low transmission fluid (https://www.yourmechanic.com/services/transmission-fluid-service) or a bad speed sensor or potentially a faulty transmission control module, which also controls the speed sensors. The transmission control module has various sensors such as...
I have a 2010 Toyota Highlander and it’s making a rattling sound under the hood. It’s louder when idle. What could this be?
Louder at idle is a concern. At idle, oil pressure is at its lowest which particularly impacts the valve train. If the issue is not "within" the engine, other possibilities are the circuit of accessories that are driven by the...

Related articles

2005 Jeep Wrangler vs. 2005 Chevrolet Blazer: Which One Should I Buy?
Sport SUVs are a class all of their own; these vehicles are meant for a fun drive through the woods and across the trail – but not necessarily to Grandma’s house! Think instead about going through the creek and through...
The Best Used Cars to Buy If You Just Retired
Here’s Here’s a cruel, hard fact – car manufacturers no longer target seniors. Instead, they devote their time and energy to appealing to the 18-45 demographic. Still, some features make certain cars more suitable for older drivers. We have evaluated...
Essential Things to Know About the 2017 Chevrolet Bolt Electric Car
The 2017 Chevrolet Bolt is the first all-electric car under $50k. The Chevy Bolt has a higher EPA rating than Tesla and gets 238 miles per charge.