Q: Engine revs way up when started, then behaves normally. If the car has recently been started, it doesn’t have this issue.

asked by on November 25, 2017

When the engine is started for the first time each day, the engine revs way up, and the RPMs gradually go down to normal idle speed. If the engine has recently been started and the engine hasn’t completely cooled off (I.e, it’s been sitting in a parking lot for 30 minutes) it starts normally. I know that the car is supposed to do this until the engine reaches operating temperature if the weather is cold, but it behaves this way even if it’s a balmy 80 degrees outside. My very amateur diagnosis is a faulty cold start sensor, but I want some input on what other culprits might be (or if I’m wrong altogether.)

My car has 82000 miles.
My car has an automatic transmission.

It is normal for the engine rpm to go up to about 1200 to 1400 rpm when first started and then comes down gradually. This is for emissions during cold start and considered normal. If you feel it is not normal then I would recommend having the computer tested for stored codes and if no codes then you may have a sticking throttle body when cold and may need to have the new start stop recall done on the vehicle.

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

What others are asking

Car will move a bit in reverse but then it acts like the front left tire is locked, also after a bit in drive it hops 2012 Nissan Rogue

Hi there, your symptoms suggest something in either the final drive - spider gears perhaps - (would be the differential in a rear-wheel drive car), or a problem with the Continuously-VariableTtransmission (CVT) which your car has. These transmissions utilize essentially...

Warning chime sounds at intermittent times while driving. No corresponding warning lights on dash.

Hi there. If you have a V6 engine in your vehicle, you may have accidentally activated the HAC (hill-start assist control) feature by pressing hard on the brake pedal. A single beep announces that it has been activated. If the...

Can an electric fuel injected engine like my Toyota Tundra backfire while driving?

Hey there, thanks for your question. I'd be happy to provide insight. While this is possible, it is probably not likely to happen with your 2014 Toyota Tundra. An engine backfire is typically caused by a spark plug, or multiple...

How do I adjust the cruise control speed?

Once the cruise control is set, you can adjust the speed very easily. To increase the cruise control speed, pull up on the cruise control lever. To decrease the speed, pull down on the cruise control lever. If you briefly...

how a code p2181 but the temp is normal

Hi there. The code, P2181, stands for Cooling System Performance. This code is meant to give a certified mechanic a starting point to begin their investigation for car problems. In most cases, the code is triggered due to either overheating...

Red oil light just came on - 2010 Ford Flex

A quick "diagnosis" can be obtained by unscrewing the pressure sensor and installing an external oil pressure test gauge. YourMechanic will compare the oil pressure at idle to the factory spec., but normally at idle you should see approximately 10...

When do the vehicle stability control and traction control systems operate?

Your vehicle is equipped with both a vehicle stability control system (VCS) and a traction control system (TRAC). They operate independent of your input – they come on and off automatically, without you having to do anything. They will automatically...

How do I handle this car issue?

Hi Ashley. Thanks for contacting us today. This is a very good question and one that often confuses car owners as to the proper way in which to handle. The solution really depends on what type of warranty or coverage...

We have a 1992 Chrysler lebarron convertible. When it rains the driver side floor holds water as well as the back floor on driver

There are several pathways that will admit rainwater and leave it where you have described. The leak can be pinpointed if you request a vehicle water leak diagnostic. If you request that service, the responding certified mechanic will get this...

Related articles

How to Buy a Toyota Prius
The Toyota Prius is one of the most popular hybrid models on the automotive market, and it comes with an array of perks. A Prius is more environmentally friendly than your average fuel-guzzling car, leaving less of an ecological footprint....
The Top 5 Selling Cars in Delaware in 2012
Delaware Delaware offers a variety of weather, which means drivers have to be prepared for both the mild and the treacherous. In previous years, the best-selling vehicles have included the Honda Civic, Accord and CR-V, along with the Toyota Camry....
A Buyer’s Guide to the 2012 Toyota Tacoma
Available Available in regular cab, access cab, double cab, and Xtracab versions, the 2012 Toyota Tacoma is Toyota’s answer to all of your compact pickup truck needs. In fact, Toyota has outsold both Ford and GM models, and the Tacoma...