Skip the auto shop - Our mechanics make house calls

Q: My truck runs and drives it starts with no problem however it takes off slow has oil in the air filter and won't go over 40 mph

asked by on

I was wondering if you may have had experience with this problem before or know what causes it if so please let me know the main problem is it not being able to go over 40 mph has some oil in the air filter but it starts and runs fine

My car has 220000 miles.
My car has an automatic transmission.

Hello and thank you for contacting YourMechanic. The oil in the air filter is from the positive crank case ventilation valve (PCV)) is not functioning causing the oil to build up and blow out of the valve into the intake. Replace the PCV valve and clean the tube to the air cleaner.

If the vehicle will not go over 40 mph, then check the IAC (Idle Air Control) valve and see if it is functioning correctly. If the valve fails, the engine will not accelerate under a load and the computer puts the engine in limp mode.

If you need further assistance diagnosing your vehicle, then seek out a professional, such as one from YourMechanic, to help you with your power loss to the engine.

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. My truck runs and drives it starts with no problem however it takes off slow has oil in the air filter and won't go over 40 mph

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: My car accelerates slowly when first taking off and jumps when it shifts gears. What could it be?

This may be related to low transmission fluid or potentially a faulty transmission control solenoid. As you may know, automatic transmissions use pressurized hydraulic fluid to change gears. Every time a gear change is required, the car's computer activates a...

Q: Stick shift, gets up 2.5k rpms and spits and sputters. Check engine light calling for O2 sensor.

Hi, thanks for writing in. The problem you describe could be a catalytic converter that is beginning to clog up and not allow the exhaust to flow freely. This will actually cause the vehicle to "choke" on the exhaust pressure...

Q: Loss of power, no check engine light.

Hi, thanks for your question. I'd be happy to help. The clogged converter may or may not give a code. If it gives a code, it would be for an O2 sensor code. I recommend checking the fuel pressure and...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.