Skip the auto shop - Our mechanics make house calls

Q: Reduced engine power

asked by on

As the mornings get colder as I start driving my engine does a reduce power. If I warm it up it won't do it. It did this last winter and computer said to change a sensor which I did. I can pull over and rev the engine and it stops. I warmed the truck up for 15 minutes this morning and it did it once. Any other ideas? Thanks
My car has an automatic transmission.

A: Hi. The first task is to extract problem co...

Hi. The first task is to extract problem codes. Whether the Check Engine light is on or not. The most common source of the "reduced power" for these GM engines is either the wiring connector to the throttle body (connections are damaged or corroded), or the throttle position sensor portion of the throttle body being worn or damaged. To get this looked at, I recommend having a qualified professional, such as one from YourMechanic, diagnose the loss of power so that this can be corrected appropriately.

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!

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: Hydrolocking #7 cylinder

Hello. If that cylinder has good compression and is getting spark then the cause would be due to the injector simply pouring too much fuel into the engine. If the injector is new then you more than likely have an...

Q: Car idling low at stop

If you have a Check Engine Light, I would start there. Any codes that are found will aid in the diagnosis of your issue. It is possible that you could have an issue with your idle air control valve. I...

Q: If I had my manifold, solenoid, transmission, and pedal sensor fixed all within 18 months. Do I have a lemon on my hands?

In order for a vehicle to be considered to be able to claim the Lemon Law, your vehicle would need to be in for service to the dealer for one problems with three consecutive visits without the problem getting fixed....

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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...