Q: 2015 mirage 51000 miles sputters and hesitates on acceleration from stop. problem stops at about 30-40mph starts fine. no stalls

asked by on November 04, 2017

2015 mirage sputters and hesitates at low speed acceleration. once 30-40mph achieved problem disappears . air filter clean. starts and idles fine. seems to hesitate only when under load in low gears. is automatic. tried injector cleaner and several tanks of 93 octane but problem persists. any ideas?

My car has 51000 miles.
My car has an automatic transmission.

Among the possibilities are faults in the throttle position sensor, mass airflow sensor, vacuum leaks, a clogged fuel filter, defective EGR valve or control circuit, and worn out spark plugs and wires. A mechanic would simply investigate these possibilities sequentially and also check to see if any diagnostic trouble codes can be downloaded from the PCM. If you want these steps performed by a certified Mechanic, dispatched by YourMechanic right to your location, please request an engine hesitation diagnostic and the responding certified mechanic will get this resolved for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

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 $65/hr

What others are asking

Oil pressure light and the engine's max speed is 4000 rpm. After 2 days the car isn't starting anymore.

You have several problems and this makes things considerably more confusing. Jetta's are known for having challenges with their oil pressure light switches. The important thing to determine is that your motor has good oil pressure. The surest way to...

Could the low oil level sensor be accidentally knocked off during an oil change on a es330 Lexus 2005. My engine recently seized up.

Hi there. Look all around the engine and around the oil pan and filter. Look for any signs of oil leakage. If there is no oil leakage, then check the engine oil level. If the oil level is full, then...

SUV rear brake squeaking - 2015 Buick Encore

You may consider having the brake pads changed with some non-Buick pads (i.e. aftermarket). Based on the number of complaints on this issue, General Motors seems to have a mismatch on brake pad material with this model. This will, unfortunately,...

When do breaks and rotars have to be replaced???

Hello Walt, thank you for writing in. To begin, know that the lifespan of the brakes, as well as most components on the vehicle, will vary depending on your driving habits. With that being said, they can last anywhere from...

Oil leaking from valve guide

If the engine only smokes blue at start-up, the valve guide seals are to blame. If the engine smokes blue constantly, especially while revving the engine, the piston rings are bad. Both issues involve complex repairs that come at a...

rough idle on start up everytime

You could have several things contributing to the hard start. Dirty or faulty throttle valve, idle air control valve, bad temperature sensor, and more. I suggest having a certified technician, like one from YourMechanic, perform a few tests to be...

Air conditioning smells bad when car enables autostop feature

Your vehicle is new enough that I couldn't find much information on the air conditioning system. I'm guessing your vehicle probably has a dual scroll AC compressor in which one scroll is driven off the engine and the other is...

Acura tl crank no start

You need to check the engine sensors on the front of the engine. They may have gotten damaged by the belt when it broke. The crankshaft/camshaft sensors or wiring is damaged. I suggest having a certified technician, like one from...

Excessive oil consumption, oil in spark plug holes, normal compression

The oil getting into the spark plug holes is from the valve cover and spark plug tube seals. Replace both of these and clean out spark plug holes of oil. This will help with the misfires and coils shorting out....

Related articles

Can a Bad Sensor Prevent a Car From Starting?
If your car isn't starting or has a hard time starting, a faulty sensor may be to blame. Car sensors monitor data to keep your car running smoothly.
How Long Does an EGR Pressure Feedback Sensor Last?
In In today's world people are more aware of exhaust gases than ever before. With that said measures have been built into modern vehicles that are meant to cut down on the emissions released into the air. Built into your...
Symptoms of a Bad or Failing Throttle Position Sensor
Common signs include lacking power when accelerating, rough or slow idle, stalling, inability to shift up, and the Check Engine Light coming on.