Q: Hard acceleration and hard braking when stop
I’ve noticed that after I’ve driven kind of spunky like, there’s hard acceleration from a stop position and hard braking… When coming to a complete stop, my car’s RPMs go rather low, almost to 500 (where that gap is) and I feel a slight vibration, plus the car seems to shake a little. Then it seems like the car recognizes that they are low and there’s suddenly a boost and the RPMs go to normal position. It idles when it goes down to 500 RPMs and then bounces up to normal.
You may be having a normal condition. When you accelerate hard, you are dumping a large amount of fuel into the engine and then stopping quick and shutting the throttle. You still have all that fuel in the engine and it has too much fuel for the engine to idle good for a few seconds. If you have a Check Engine Light or feel the idle is getting too low or it stalls, then you should have the system checked by a mechanic.
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
How do you get maximum cooling with the Dual Zone Automatic Climate Control?
During very hot weather, you may find that normal air conditioning operation doesn’t quite cut it. There are two ways that you can obtain maximum cooling with your car. Here’s what you should know: Auto: You can use the Automatic...
F-150 loses power while trying to go reverse
Fix your exhaust (https://www.yourmechanic.com/services/exhaust-system-hanger-replacement) and coil packs (https://www.yourmechanic.com/parts/ignition-coil) 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...
AC stops working, blows warm air
Hello. Your A/C system has multiple components and sensors. It is possible that the high pressure switch is faulty (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-ac-pressure-switch). It is also possible that the blend doors for the hot and cold air are sticking and unable to open...
crack in theromstat housing
Hi there. This is a common problem on this engine. If the housing is cracked then the entire intake manifold needs to be replaced as an assembly. There is no repair that will ensure that it will not leak any...
I am looking for senor lights front and back. live in cairns queensland. HOW much would it cost to have them installed. thank you.
Hi there: Unfortunately, we're based in the United States and service North America only as of now. You might want to search for local truck or Jeep accessory dealers in Queensland to complete this service for you. Best of luck!...
Electric power steering replacement how much does it cost
From the description you have provided it sounds like it could be, the electric power steering motor has failed. It could also be, an electrical power or ground failure to the power steering motor. Before you have the electric steering...
Fuel smell
There are a number of things that can cause poor fuel mileage. A faulty camshaft position sensor (https://www.yourmechanic.com/services/camshaft-position-sensor-replacement) is one of them. The camshaft position sensor is a magnetic sensor that monitors camshaft speed to regulate ignition timing and fuel...
When I drive over 35 mph and go through pot holes or bumps on the ground, my truck makes this crazy clunking noise like the wheels gonna come off.
Check all of the suspension, the suspension bushings, the ball joints on the front of the vehicle. A loose suspension control arm, worn or damaged control arm bushing, or a loose or worn ball joint on the upper or lower...
Car shakes when accelerating and has a hard time starting
Shaking or vibration (https://www.yourmechanic.com/services/engine-is-shaking-pulsating-or-vibrating-inspection) may be caused by many different things such as faulty spark plugs, poor fuel pressure or misfires. Other things such as a faulty idle air control valve (https://www.yourmechanic.com/services/idle-control-valve-replacement) may cause the engine idle to drop below...
Related articles
Should the Brake Fluid Be Flushed Every Time the Brakes Are Replaced?
While While it’s possible to get away with simply topping off your brake fluid with a brake replacement, Replacing the brakes is the ideal time to perform a brake fluid flush. For starters, you or your mechanic is already in...
The Best Used Cars to Buy If You’re a Vet
The The best car for a vet to own largely depends on the type of practice he or she has. Large animal vets are probably going to want something that delivers a fair bit of power, and possibly even towing...
The Best Used Cars to Buy If You're a General Contractor
If If you're a general contractor, you probably aren’t in the market for a used car. More likely, you’re looking for a pickup truck, because you need to haul equipment and supplies to various job sites. Most contractors will likely...
Browse other content
Services
Cities
Maintenance