Sudden jerk upon acceleration, low gas mileage – 2013 Range Rover

ANSWER : Hey there, thanks for writing in about your 2013 Range Rover. You may have a problem with the throttle control that may be dangerous to drive. There are many other possibilities, such as a vacuum leak, faulty mass air flow sensor, or a bad fuel pump. If you would like to have this checked by a professional, a certified technician from YourMechanic can come to your car’s location to inspect the jerking problem.

ANSWER : Hello. We will be happy to help with your 1997 GMC K1500 Suburban. There’s likely a combination of reasons as to why your MPG has so greatly declined. I suggest that you have a technician inspect the following items and perform the needed repairs.

Flush out the fuel injectors using an injector flush kit, replace your fuel filter, inspect the spark plugs and wires (and replace if necessary), check the air filter (replace if found dirty). Cleaning a dirty mass airflow sensor will help increase the MPG as well. I also suggest that you check the pressure and condition of the tires. Low air pressure or bad tires will decrease in MPG, too. If you would like to have this inspected by a professional, a qualified technician from YourMechanic can come to your car’s location to diagnose your mileage issue and let you know what should be done.

ANSWER : Hello there. A decrease in fuel milage can be attributed to a few different faults. The most common causes are leaking fuel injectors, oxygen sensors, coolant temperature sensors, vacuum leaks or exhaust leaks. A qualified technician, such as one from YourMechanic, will check all of these for proper operation and can make any repairs required.

ANSWER : Hey there. This may be a sign of a dirty or failing mass air flow sensor. The mass air flow sensor is a unit in the intake system that monitors air intake as it is mixed with fuel prior to being injected into the motor. When this fails, this can cause an imbalanced air/fuel load to be supplied to the motor which results in an over fueling or under fueling situation depending on the conditions. This is what causes the hesitation or loss of power you describe. Depending on the make and model of the vehicle and the type of ignition system it uses, this type of symptom can also occur when there is moisture inside the distributor cap causing a misfire as you try to accelerate. I would suggest having a professional from YourMechanic come to your home to diagnose the jerking issue and follow through with any repairs that are needed.

ANSWER : Hi there – this truck has electric fuel pumps, and should pick up fuel after you put 4-5 gallons in the tank. When re-starting, turn key to "Run" position for several seconds, then back to "Off". Do this 4-5 times. Should prime the pump. Then hit "Start.

ANSWER : Hello. The fuel mileage rating on most vehicles is a rating estimate of the fuel mileage you should get. The problem with this rating you see in the windshield is based on city or highway driving. Both of these ratings are done in a controlled manner with no A/C or accessories used during the test. Your actual mileage will vary depending on the traffic congestion, traffic lights per mile, and other things like tires and tire pressures. Even the altitude you are at will get better mileage in higher altitudes and less if you live near sea levels. If you would like to have this looked at further, a qualified expert from YourMechanic can come to the site of your car to diagnose the fuel economy concern.

ANSWER : If your car is misfiring, the Check Engine light should be on. Unless it is not working.There are some other possibilities which would not turn on the check engine light, but without driving the car it’s very hard for me to say. As for motor mounts, that isn’t a bad guess, but motor mounts usually aren’t a problem until the car is 9 or 10 years old. The best recommendation I can make is to have a professional drive and evaluate your car. You can have that conveniently done by contacting Your Mechanic. They can send a technician to your home or office to check out your Toyota and let you know what it is going to take to solve your problem.

ANSWER : Unfortunately, real world mileage numbers very rarely stack up to those advertised by the manufacturer. There are things you can do to improve your mileage, however.

First of all, make sure your tires are properly inflated at all times. Don’t wait until the tire pressure monitor comes on to warn you of a problem. Keep up on your maintenance – this includes filters, fluids, etc.

Follow the maintenance schedule in your owner’s manual. When it comes time to change your tires, look at low resistance tires for improved fuel economy.

Finally, adjust your driving habits. I know you said you don’t drive the vehicle rough, but driving slower and anticipating stops can also improve your mileage. When it comes time for your scheduled maintenance or if you’d like your low gas mileage diagnosed, I suggest you give the professionals at YourMechanic a call.