Q: Throttle delayed at high rpms

asked by on September 21, 2016

Hi. This is my first time posting on a site like this so bear with me. A while ago I replaced my alternator and ever since then if I take my foot off the throttle above 3000 rpms and step on it again it sounds like it wants to accelerate but there is a few seconds delay before any noticeable power is produced. Sometimes the power doesn't come at all. I passed someone today and tge acceleration was pathetic. Below 3000 rpms it seems to have normal throttle response. Any idea what this could be.
My car has a manual transmission.

I’m curious if your Check Engine Light on. It sounds like there may be an issue with either the throttle position sensor offering false readings to the computer or there’s an issue with the reaction of the throttle plate. There can be carbon buildup inside the throttle bore causing the throttle plate stick a little especially when the plate slams shut then you try to open it again. If you’d like to get this fixed, consider hiring an experienced technician like the mobile experts we have here at YourMechanic for a proper diagnosis of your loss of power.

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

Cylinder misfires
Sometimes an ignition coil failure may be due to outlying causes like oil on plug wires or plugs with too large of a gap. If the coil has to work too hard to jump the gap, the spark plugs can...
Key won't turn after inserting into ignition
Hello. It sounds like the ignition has locked up and this is preventing your key from working properly. This sometimes happens if the components inside the ignition gets worn out and gets stuck, preventing the key from turning the ignition....
Battery plate
Hi there: It depends on where the hold-down strap is located that is rusted. If there are two individual bolts on either side of the battery, you can cut the one closest to you that is easier to access and...
The check engine light on for my 2005 Chevrolet Avalanche
Hey there, thanks for writing in about your 2005 Chevrolet Avalanche. If the gas cap was loose but then later taken care of, then the light may be due to another issue. You will need to have the Check Engine...
Hoses Collaped
When the cooling system heats up the coolant expands and the coolant excess pressure is released out the radiator cap into the overflow reservoir. When you shut off the engine the engine will start to cool off and the coolant...
car squeaks and is har to turn
I'm going to guess that you have a power steering pump belt that is slipping. The slipping belt makes the squeal and the slower turning pump makes the wheel hard to turn. Your car may just need a new belt...
How do i fix the trunk release on a 2010 chevy aveo
Hello, thank you for writing in. There are three main components to be concerned with. Your handle for the trunk is likely manual, meaning it is connected to a cable that pulls a latch in the trunk. You are going...
Sparking Dipstick/Oil Tube
The vehicle is "probably" safe to drive but to give you a truly informative and intelligent answer, the vehicle would have to undergo a safety inspection (https://www.yourmechanic.com/services/75-point-safety-inspection) which is not a bad idea in any event given that the car...

Related articles

The Best Used Cars to Buy If Your Kid's On the Soccer Team
If If you are a soccer mom (or dad), you know that you need a lot of space to transport your budding World Cup contenders, along with their gear. From time to time, you can also expect to be bringing...
Symptoms of a Bad or Failing Throttle Body Temp Sensor
Common signs include poor engine performance, stalling, and broken electrical connections.
Top Five Selling Cars in Colorado in 2012
Colorado Colorado offers a varied climate depending on where drivers are located. Those in lower elevations see plenty of sunshine all year, while those in the mountain areas can see as much as 300 inches of snow. Due to this,...