1993 Lincoln towncar revs up by itself while idling but n...

Q: 1993 Lincoln towncar revs up by itself while idling but not while driving. what's the most common cause for this?

asked by on July 02, 2017

My car recently started to rev up by itself while idling in park. It does not do it while driving. What is the most common cause of this?

My car has 150000 miles.
My car has an automatic transmission.

Hi there. In most cases, when the engine will idle higher after shifting into neutral or park is an indication of a vacuum leak. It could also be due to a malfunction of the idle control valve, or a malfunction of the throttle body itself. You might want to have a professional mechanic come to your location to complete an engine idle is high inspection, to determine the root source of this problem and recommend or complete the right repairs.

Was this answer helpful?
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

Cannot shift from Park : have to use override-trick of pulling on shift lever while turning key.

The shift lock actuator is actuated when you push on the brakes. If the brake lights do not work then it will not release the shift lock. Check the brake lights to make sure they work properly. If they do...

When I press the brake I hear a click on the passenger front.

You may be hearing the brake pad moving in the caliper bracket due to a small amount of rotor warpage and grooves. This may be okay if it is very minor, but I do not take chances with brakes since...

Car making noise

The most common noise that Lincoln LS owners hear is from the brakes, or a bad wheel bearing. If the noise is a scraping sound, it's likely the brakes. If the car is making a grinding, roaring noise that changes...

Related articles

A Buyer's Guide to the 2012 Lincoln MKX
As As far as midsize SUVs go, the 2012 Lincoln MKX is one of your best options out there. Considering its price, Lincoln packed this vehicle with a ton of power and luxury. Although it bears a strong resemblance to...
Lincoln Certified Pre-Owned (CPO) Car Program
Lincoln certified pre-owned cars are under 7 years old, have less than 60,000 miles, and come with a 6 year or 100,000 miles comprehensive warranty.
A Buyer’s Guide to the 2012 Lincoln MKT
This This roomy wagon definitely has a different look – its bold and somewhat retro lines, draw attention in a way Lincoln hasn’t experienced since perhaps the ’78 Town Car. While the MKT may not be the sleekest, sportiest crossover...