Skip the auto shop - Our mechanics make house calls

Q: I have a loss of power and I can't really press on the gas too hard or the engine will start shaking/stalling

asked by on

When I start the car the engine idles at various rpms and will almost stall but never does and I usually wait it out for it to settle but sometimes I gas it to about 3.5k rpm and it stops changing and stays pretty consistent, any idea what it might be? When the car is rolling and I slip it into nuetral it goes to whatever rpm you want it to

My car has 160000 miles.
My car has an automatic transmission.

A: The engine may have a vacuum leak in the th...

The engine may have a vacuum leak in the throttle intake tube between the mass air flow sensor and the throttle body. Or the mass air flow sensor may not be working correctly or is contaminated. Have the computer scanned and the codes received diagnosed to see if the mass air flow sensor needs to be replaced or if the wiring to the sensor or ECM is losing contact.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
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

Get a quote

What others are asking

Q: Car temperature gauge is halfway. I just changed the thermostat. Why isn't it going down?

Hey there. There are a few other reasons aside from the thermostat that may cause the car to overheat such as a clogged radiator or potentially a faulty coolant fan switch. A clogged radiator may prevent the coolant from flowing...

Q: O2 SENSOR

The difference between these two sensors is simply the design because one is meant to be mounted in a smaller, tighter, location. If you were to replace all of the oxygen sensors, the angled one would have to go back...

Q: I smell gas under my hood and around my engine.

You could have fuel leaks on the fuel rail or any of the fuel injectors. You could also have a fuel tank vapor line to the intake manifold leaking vapor. Any fuel leak should be thoroughly investigated to isolate the...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...