Q: Problem with speed. No check engine light on but when accelerating speed, it decreases then speeds right back up. No stalling at all

asked by on October 01, 2016

Problem with speed. No check engine light on but when accelerating speed, it decreases then speeds right back up. No stalling or stopping at all

My car has 147564 miles.
My car has an automatic transmission.

Car is slow to accelerate Inspection $94.99 - $114.99 Get a Quote

Hi, thanks for writing in. This is a common problem associated with fuel/air delivery which is very commonly related to what is called a mass airflow sensor. This monitors the flow of air intake into the throttle body as it is mixed with fuel to deliver the right air/fuel mixture into the motor. When this is not working properly, this will cause this kind of hesitation or surging when trying to accelerate. I would recommend having an expert from YourMechanic come to your home or office to confirm a diagnosis on the issue and make or suggest the necessary repairs or replacements.

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

Car keeps cutting off
If your car keeps cutting off, then this may or may not be related to the fuel line. If you suspect it is indeed related to a fuel line, then that means that fuel is probably leaking, and the vehicle...
On interstate, car severely vibrated and pulled to left
Hi there. There is indeed a recall for this exact issue - it is #06186 (http://www.suzuki-forums.com/2g-1999-2005-vitara-grand-vitara/22567-front-crossmember-corrosion-rust-through-recall.html) and it calls for crossmember replacement. I recommend you present this recall (https://www.yourmechanic.com/article/what-to-do-if-your-car-is-recalled-by-jason-unrau) to the dealer so they can make things right.
Gear locked and car not starting
Hi there. There is an issue with the shifter interlock lock solenoid in the shifter housing. The solenoid has lost power or it has been shorted out. Remove the carpeting and get to the shifter housing and remove it from...
Are strut mounts typically replaced when you do new struts on front end? Quoted $700+tax for both - not including alignment. High?
Hi there. Were the mounts quoted in the estimate? Was a strut assembly quoted? If the answer is no to these questions, then the strut mounts were not quoted. However, the strut mounts on this vehicle are pretty much just...
What gear oil do I need for a 2006 for escape
A synthetic grade 75W140 will work just fine for the differential. To be certain, check the specifications section of your owner's manual. One of our mobile technicians can perform a differential service (https://www.yourmechanic.com/services/differential-gear-oil-replacement) for you whether is 2 or 4...
Hi Jerel, how are you? I have a 2008 chrysler sebring convertible and my check engine light is on, I went and had it checked and s
If you are referring to Codes P2004, P2017, and related codes (https://www.yourmechanic.com/article/p2004-obd-ii-trouble-code-intake-manifold-runner-control-stuck-open-bank-1-by-jamahl-walker), if those codes have set it means that the intake manifold runner control (IMRC) is stuck or sticking. The Powertrain Control Module (PCM) provides the IMRC with information...
In a 2005 Lexus es330 How do you turn off the check engine light once fuel cap has been replaced and is on securely?
Hi there. Unfortunately, a plug & play code reader cannot determine the fault that has set the check engine light. The codes that the parts person pulled are most likely what are called evaporative emissions codes ( these codes pertain...
I have a 2009 please Pontiac G6 GT and replaced the radiator and thermostat and still overheating. There is no coolant flow?
Check to make sure the hoses are not collapsed as that would obviously prevent coolant circulation. Check the serpentine belt tension on the water pump pulley to be sure the belt is driving the pump at adequate speed. It is...
2010 Chevy Tahoe, no crank no start somedays. open/close fuse box crank up. driving stable track, and service traction control
There are a large number of Technical Service Bulletins (TSBs) published by GM relative to the Tahoe's electrical system. In fact, the number is the largest I can recall from recent checks of the variety of other models we deal...

Related articles

The Best Used Cars to Buy If You Love Road Trips
If If you love to travel, comfort is very important in a vehicle. You want a nice, quiet ride, comfortable seating, and enough room. We have evaluated several used vehicles, and narrowed our favorite road trip vehicles down to the...
The Best Used Cars to Buy If You Love Camping
Do Do you love camping, getting back to nature and enjoying life in the great outdoors? If you do, then you know that getting there can be half the fun, and it’s even better if you have a great ride....
How to Customize Your Classic Chevy Pickup
There There are some vehicles that stand the test of time, proving they are functional, attractive, and in demand several decades after they were originally manufactured. One such vehicle is the Chevy pickup truck. The Chevrolet lineup has included pickup...