Q: Engine shaking rough idle losing power and burning rich

asked by on July 19, 2017

Engine shaking, burning rich, lossing lower and a rough idle. Replaced the crank sensor didnt fix it

My car has 185000 miles.
My car has an automatic transmission.

Loss of power Inspection $94.99 - $114.99 Get a Quote

Hello, thank you for writing in. The first step when having these issues is to scan the vehicle for diagnostic codes, regardless of having a warning light on or not. With no codes, it will be a process of elimination. The issues may include a spark malfunction, air intake sensor issue, an exhaust leak, or a fuel injector issue. Only further inspection will tell. Start with scanning the vehicle, and use any codes present to direct your focus. Without codes, check for proper spark, and work your way down the list. For more help with diagnostics and repairs, contact our service department to schedule an appointment.

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

What does it mean if the Low Tire Pressure light comes on in the dash?
Your car’s tire pressure monitoring system is designed to track the pressure in all four tires and alert you if one (or more) of them drops below the safe threshold. If the Low Tire Pressure light in the dash comes...
How do I turn the compass on or off?
The compass in the car will tell you which direction you’re traveling. You can turn it on or off. Press Auto on the rearview mirror for three seconds or longer to turn the compass on or off. Press Auto and...
Cooling fan faulty
Hi! The fans on earlier Acura's usually develop these issues. The issue is usually caused by a faulty fan control switch. But may also be caused by a faulty fan, a faulty relay, or faulty fan wiring. I strongly suggest...
Window not working
Hello. I will assume your drivers front window is not working. A mechanic can check the fuses for the window for any that may have blown. In the event of a blown fuses, some trouble in the circuit caused the...
Oil is leaking in SUV, but source can't be found
Hello. You should start by checking the oil (https://www.yourmechanic.com/article/how-to-check-your-engine-oil) only when the vehicle has sat for about an hour to see if more shows up. If it does then you have a clog in the return holes in the engine....
Stabilitrak
Your car is equipped with what are called wheel speed sensors (https://www.yourmechanic.com/services/wheel-speed-sensor-replacement) which monitor the speed of the wheels at all four corners. When they detect that wheel speed is out of the ordinary in a given set of conditions,...
Shift selenoid "A" electrical P0753
If you did not do so while replacing shift solenoid "A" (https://www.yourmechanic.com/services/downshift-solenoid-replacement) (if I am reading your query correctly), disconnect the battery for 10 minutes or so, re-connect the battery, and drive the car for 15-20 minutes. This will reset...
Brake system lights on
Hello - given your attempts at replacing the common ABS/TCS failure components (wheel speed sensors), most likely the diagnosis of a failed ABS controller module is correct. Given the expense of replacing the controller, or of having yours rebuilt -...
Will not acceleration
Hi there. It is possible that your Lincoln has entered a "limp mode"; which is when a problem is found in the transmission by a sensor. Essentially, it locks your vehicle in a low gear and restricts the speed, so...

Related articles

Symptoms of a Bad or Failing Exhaust Gas Recirculation (EGR) Valve
Common signs include engine performance issues like decreased power and acceleration, rough idle, and the Check Engine Light coming on.
How Long Does an Idler Pulley Last?
The The drive belt that is on a car runs nearly all of the major components of the engine. Most of the newer cars on the market have a serpentine belt rather than various V-belts. In order for this belt...
How to Replace a Fuel Return Hose
Fuel is transferred by a return hose which fails when gas is leaking or the carburetor is flooded. You may smell gas if the hose is faulty.