why would a car accelerate without pressing the gas

Not enough oxygen results in unburn fuel rich mixture and too little oxygen lean mixture. Normal idle when in park is like 1 or slightly lower.

10 Causes Of Car Engine Hesitation When Accelerating

5th November 2008 1306.

. It opens the throttle plate upon pressing the gas pedal. With my foot off the brake the car starts to accelerate itself to 20 mph in a fashion similar to using cruise control going uphill. However even with fewer pedals there is still the possibility of an electrical malfunction which could cause the car to accelerate when braking.

This randomly started happening yesterday while driving home from work. Login or register to post comments. You will need to take it to the mechanic.

2003 Pontiac Montana. The problem could be due to electrical or mechanical malfunction. Some drivers wish to stop their cars but then unintentionally press the gas pedal instead of the brake pedal.

If I kicked the pedal to knock it off the burr it would then slow down. You can also test your fuel pressure or try to do a compression test. When putting in park the rpm gauge jumps to a 3 and slowly lowers to a 2.

It happens at 2 second intervals in between. Asked by alvfam6 in Chicago IL on March 18 2015. The more pedals a car has the higher the chances of confusion.

It might be blocked. Sometimes it is a simple issue that you can identify and fix yourself. The other reason could be that something is preventing the fuel from reaching the combustion chamber in correct quantities and.

When braking the car jumps forward and the rpm gauge stays at about a 2. You might need to visit a mechanic to offset certain issues but they do not usually indicate a larger engine problem. Youll need to track the condition of your vehicle so that you can identify and relate issues as they happen.

Here are a few of the top reasons your car might not be accelerating when you press the gas pedal. The 5 Causes of Car Not Accelerating When Pressing Gas. Car accelerates without my pressing the gas.

Commonly this sensor gets dirt if you have an open-air filter or havent changed the air filter in a while. If your car starts taking a long time to accelerate and jerk then this is the sign of broken accelerator cable. One of the things that makes an automatic transmission possible is a special kind of automatic clutch that I call a slush box Torque converter - Wikipedia a fluid coupling which blahblahblah.

You always should worry about the car rolling back and be prepared for it. Answer 1 of 3. After about 60K miles the pivot developed a burr that locked the gas pedal open and kept the vehicle about 60 MPH.

I was driving home going about 45 mph when all of a sudden my car wouldnt accelerate as I press the gas. At first the it wouldnt even rev but the more I pushed on the pedal it did start to rev up and suddenly my car would jump forward with acceleration for all of 2 seconds then stop again. If your accelerating wont go past 40 mph then there might be a problem with your exhaust pipe.

Answer 1 of 14. The most common cause of a car that wont accelerate is a lean air-fuel mixture. And yes the car will climb without use of the accelerator up some serious inclines if the surface is smooth and provides enough traction.

When driving down the road the car accelerates on its own and the rpm gauge runs at about a 3. Wrong application of the brake pedal can also be responsible. I had a similar problem with a K5 Blazer where the gas pedal had a plastic pivot point in the linkage.

Why a car wont accelerate past 40. If a vehicle has a defect in its electronic system the mechanism that controls the cars power train could malfunction. Turning the car off putting it in park and turning it on put the rpms at 35k.

Why would a car accelerate without pressing the gas. Shifting to drive put the rpms to 3k and will move the car pretty swiftly without even touching the gas. You dont tell us anything about what kind of car this is but I can think of only 3 reasons why without consciously changing gears.

Tue 04282009 - 1658 frankk79. The most obvious cause of low slow or no acceleration may be that your car does not have enough fuel. The mass airflow sensor measures the air entering the engine and the engine control unit is then calculating how much fuel should be injected into the engine.

My car has 172600 miles. The cable can degenerate and even break over time. It bucks when I first accelerate.

I have to hold the break pedal down pretty hard to keep it. 1 The Quick Fixes. My 2003 Montana accelerates without pressing on the gas and stays fast even when stopped.

Thats a feature of the automatic transmission. Whats wrong with my car when I press the gas pedal while driving the car shows high RMP but not equal acceleration. Your gas pedal and throttle plate have a cable running in between that is called accelerator cable.

While stopped with my foot on the brake I could hear the car engine revving as if I was trying to accelerate the car. The oxygen sensor or O2 sensor is a device that helps monitor the emissions of your vehicle so as to analyze the air-to-fuel ratio going through the engine In a nutshell you need to proper amount of oxygen to properly burn the fuel in the engine. The car wont not normally but its best not to get caught out.

Reasons Your Car Wont Accelerate. Car accelerates without pressing gas pedal. The problem might also be from the timing or floating of the valve.

What could be going on. There are a couple of reasons why your car will accelerate when you press down on the brake pedal. Sudden unintended acceleration occurs when an electronic malfunction within the vehicle causes the throttle to expand and the car to accelerate without the driver pressing down on the gas pedal.

Why Is My Car Accelerating By Itself Explained