Q: Possible vacuum leak causing engine to rev while parked.

asked by on January 04, 2016

Engine revs while in park. Someone suggested it might be a vacuum leak.

It is possible that you may have a vacuum leak and if you do the computer will generate a code for system too lean. I would have a technician come out and inspect the codes on the computer and see if you do in fact have a vacuum leak.

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 making a noticeable noise

Hi. Typically noise from a spinning part on your car is due to either a pulley or belt. If the noise is squealing that signifies that a new belt is in order. I would suggest having a certified mechanic, such...

Why am I having trouble getting fuel to go into my tank?

This is likely related to your EVAP emissions system and something called a purge solenoid. The EVAP system prevents fuel vapors from the fuel tank from escaping into the atmosphere. The EVAP system collects and temporarily stores the fuel vapors...

What happens if I don't replace knock sensor?

The knock sensor on the engine is there to detect for an engine noise from pre ignition (pining) normally. This is so the computer can advance the ignition timing to the maximum it can without the engine pinging. This gives...

1999 Jeep Grand Cherokee dies while driving

A faulty idle air control valve would cause the exact issues you describe. The idle air control valve will be located right next to the throttle body inlet. The idle air control valve controls the idle speed of the engine....

Heater and coolant not working

Engine coolant is not only responsible for cooling the engine, it provides heat for the interior as well. Coolant flows from the engine into the heater core, which is located inside the car behind the dash. If coolant is not...

Hi, about how much is it to fix a gas leak from a fuel line.

Billing question sent to CS about repair cost for a fuel leak as fuel is being poured in.

Car idles and dies

It sounds like you are having a problem with one of the sensors on the engine. It is common for a malfunctioning sensor to let an engine start, but once the throttle is applied, the engine will stall because it...

Oil light on, coolant light on, buzzer, odometer quit working

Hello. I would have the engine oil pressure checked immediately. Having the correct oil level isn't enough if the engine is unable to maintain sufficient oil pressure. It's possible the coolant level and oil pressure sensors are faulty, hence the...

Car is leaking coolant, and overheating, is it the intake manifold gasket?

This may be related to a few different things such as a bad thermostat, a failing coolant fan relay, or a blown head gasket. As you may know the thermostat regulates the flow of coolant in and out of the...

Related articles

How to Remove Cylinder Head Bolts
Removing Removing the head is a major step in removing the cylinder head. These head bolts hold the cylinder head to the engine block. The head bolts are long bolts that go through the cylinder head and head gasket and...
How Does a Radiator Keep an Engine Cool?
Car radiators cool off your engine and prevent your engine from overheating. Coolant absorbs engine heat and dissipates it through the radiator.
How to Get a Used Engine
The engine under the hood is the most important component of a vehicle. Without the engine, your car cannot run and is of little value to you. If you have been in an accident, or neglected your engine to the...