Q: Brakes bad and car running rough

asked by on February 16, 2016

My brakes seem to be failing. I have to apply a lot of pressure to stop my car. The brake pedal is hard to press as well. In addition, my Check Engine light is on, my engine seems to have lost some of it power, and my car rumbles and shakes while idling. Sometimes the car stalls and when at a red light, the car moves forward in a jerking motion when I press the gas.

Check Engine Light is on Inspection $79.99 - $89.99 Get a Quote

Hi, the first thing to do is to figure out why the Check Engine light is on. A certified technician will be able to hook up a computer to the car which will read the DTC (Diagnostic Trouble Code) which is what causes the light to illuminate. Once we have that code, it will help with the diagnosis of the vehicle. This sounds like you have a vacuum leak somewhere in the engine though, not the brakes failing. Modern cars have Power Brakes, in which we use the vacuum of the engine to assist the driver in applying the brakes. Without the correct amount of vacuum the Power Assist won’t be able to help out as much in applying the brakes. The other issues you mentioned will also happen when the engine’s vacuum is not at the correct level. Have a certified technician inspect why your Check Engine Light is on and also pull the DTC code to help further diagnose the 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

What others are asking

Car jumping and trying to stall when started

There are many possibilities that could cause your concern. The most likely cause would be one of the engine sensors not reading correctly. If the computer isn't getting the right info, the engine may not be able to continue running...

How hard is it to replace the EGR valve on my 2000 Ford Focus

Hi there. If the bolts to the EGR (exhaust gas recirculation) valve are frozen in place by rust, you could put a small blow torch to the bolts and get them cherry red and then try to remove them. If...

Truck bogs down at wot.

Hi there. It appears as if you've checked all the usual suspects that can impact acceleration "bogging" issues except for two the throttle body and fuel injectors. When you're quickly applying throttle to a fuel injected engine, having a clean...

No more engine oil 2005 Ford Mustang

Hello - If you have lost all the engine oil through the oil pan, there is no doubt broken internal engine damage. Most likely, this is a broken connecting rod or piston. Attempting to restart the engine would be difficult...

Car will stall out at random while driving?

Hey there. While it has been some time since I worked on one of these early CCC vehicles, the first place I would look is the carburetor itself. If the vehicle idles fine but stalls or hesitates when hitting...

My clutch pedal is extremely "light" and gears won't go in.

There are a few possibilities; you either have a problem with the hydraulics, a mechanical problem with the clutch, or a transmission fluid leak. Hydraulics: When you push down the clutch pedal, the clutch master cylinder (CMC) uses...

Clicking sound form engine

A ticking noise upon acceleration is a common sign of a timing chain or valves not functioning correctly. If under a steady RPM the sound remains, it is in need of a valve job. If the sound subsides or goes...

I would like a quote on lexus gx 470 2008 for replacing these parts : 1 axle , 120k miles maintainence, water tank. thank you . A

You can follow this link which will ring you to a page where you can request several estimate and recommendations based on your vehicles mileage. In many cases, a 120k service may include but is not limited to a transmission...

My car won't start 1999 Ford Escort

Hello - sounds like you have more than one problem here. The battery drain problem can be diagnosed by connecting an ammeter to the positive (red) battery cable, observe the current drain (likely less than 1 amp), then, one at...

Related articles

The Top 5 Selling Cars in Kansas in 2012
Kansas Kansas sees a varied climate with all four seasons, which means drivers in the area choose a variety of vehicles. In years past, some of the front-runners have included the Ford F-150, Buick and Toyota Camry. 2012’s top five...
How Disc Brakes Work
Car disc brake systems are made up of the rotor, brake pads, pistons, and caliper. The pistons push the pads into the rotor to slow or stop your car.
What’s the Difference Between Drilled and Slotted Brakes?
Brake Brake rotors are a fundamental part of a vehicle’s braking system. They’re a simple system, but made up of many different parts. The driver applies the brakes by pressing on the brake pedal, which signals the rest of the...