Car stays running when off? Get your car inspected at your home or office.

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How much does Car stays running when I shut the key off Inspection cost?

It depends on the type of car you drive and the auto repair shop you go to. Our mechanics are mobile, which means they don't have the overhead that repair shops have. They provide you convenience by coming to your home or office.

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$70 to $80
Labor: $70 -$80
Parts: $0
Average Dealer price
$93
Average Shop price
$83
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Our mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%
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ServiceYourMechanic PriceShop/Dealer Price
Car stays running when I shut the key off Inspection for 1969 GMC K25/K2500 Pickup V6-5.0LYourMechanic Price$70.00Shop/Dealer Price$84.52 - $95.41
Car stays running when I shut the key off Inspection for 2004 Volkswagen Golf L4-1.8L TurboYourMechanic Price$70.00Shop/Dealer Price$84.59 - $95.53
Car stays running when I shut the key off Inspection for 1982 Porsche 911 H6-3.0LYourMechanic Price$70.00Shop/Dealer Price$106.36 - $133.63
Car stays running when I shut the key off Inspection for 2014 Toyota Prius Plug-In L4-1.8L HybridYourMechanic Price$70.00Shop/Dealer Price$84.56 - $95.49
Car stays running when I shut the key off Inspection for 1987 Chevrolet Blazer V8-6.2L DieselYourMechanic Price$70.00Shop/Dealer Price$84.53 - $95.43
Car stays running when I shut the key off Inspection for 2015 Ram C/V V6-3.6LYourMechanic Price$70.00Shop/Dealer Price$84.52 - $95.40
Car stays running when I shut the key off Inspection for 1974 Lincoln Continental V8-7.5LYourMechanic Price$70.00Shop/Dealer Price$95.56 - $114.73
Car stays running when I shut the key off Inspection for 1972 Dodge Dart L6-3.7LYourMechanic Price$70.00Shop/Dealer Price$84.59 - $95.52
Show example Car stays running when I shut the key off Inspection prices

Car stays running when I shut the key off Inspection Service & Cost

We’ve all heard a car continuing to run after the ignition key has been turned off, and it usually sounds pretty bad, with all kinds of clonking and coughing noises. These days, though, you’re more likely to hear this in the movies, when sound-effects staff is trying to show the viewers what a clunker this particular actor is driving. Modern cars are seldom afflicted with this particular problem.

The phenomenon often called “dieseling” is caused by a condition known as pre-ignition, where hot spots in the engine’s combustion chamber fire the compressed fuel mixture without needing a spark. This syndrome can also be present when the car is running under load, producing a characteristic – and potentially damaging – pinging sound.

What is actually happening is the fuel charge exploding all at once instead of burning across a moving flame front away from the spark that normally initiates combustion. Also known as detonation, the sudden explosion is often caused by the use of a too-low octane-rated fuel.

If this is happening to your car, it’s probably an old one with carburetors. New models all use electronic fuel injection, which shuts down when the key is switched off. Without fuel going to the cylinders, there can be no running on. Carburetors, however, will continue to supply fuel as long as the engine is turning over.

Because this phenomenon often occurs in older cars with a higher build up of carbon deposits in the engine, you may need to use a higher octane fuel than was originally specified. If this fails to quell the running-on mischief, then a tune up and possible replacement of spark plugs with a colder heat range may be called for.

Replacing your intake side valve stem seals may sometimes correct this issue as well.

Common reasons for this to happen:

  • Ignition timing is off
  • Broken lock cylinder
  • Bad intake side valve stem
  • Bad spark plugs

What to expect:

A top-rated mobile mechanic will come to your home or office to determine the source and cause of the running-on issue, and will then provide a detailed inspection report that includes the scope and cost of the necessary repairs.

How important is this service?

A running-on car is not only a waste of energy and fuel, it also presents a potentially dangerous situation. Book a mechanic to diagnose the issue as soon as possible.

Fast and easy Car stays running when I shut the key off Inspection service at your home or office.

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83 reviews
Martin
37 years of experience
This is the second time that Marty has changed oil on our vehicle and I was very happy with his professionalism and friendliness. Using YourMechanic has been great since I have a baby and don't want to spend time waiting at a shop with him. This was super convenient for us.
2003 FORD F-150 - OIL CHANGE
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Timothy
17 years of experience
He is great. I would highly recommend him.
1990 CHEVROLET CAPRICE - HEATER IS NOT WORKING INSPECTION
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14 reviews
Anthony
20 years of experience
Anthony were very professional and knowledgeable and answer all my questions.
2003 FORD FOCUS - HEATER HOSES REPLACEMENT (LOWER)
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4 reviews
Joseph
15 years of experience
Very friendly. Punctual. Excellent service.
2002 LINCOLN LS - OIL/FLUID LEAK INSPECTION
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Get an instant quote for your car
Our mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%
Get a quote
ServiceYourMechanic PriceShop/Dealer Price
Car stays running when I shut the key off Inspection for 1969 GMC K25/K2500 Pickup V6-5.0LYourMechanic Price$70.00Shop/Dealer Price$84.52 - $95.41
Car stays running when I shut the key off Inspection for 2004 Volkswagen Golf L4-1.8L TurboYourMechanic Price$70.00Shop/Dealer Price$84.59 - $95.53
Car stays running when I shut the key off Inspection for 1982 Porsche 911 H6-3.0LYourMechanic Price$70.00Shop/Dealer Price$106.36 - $133.63
Car stays running when I shut the key off Inspection for 2014 Toyota Prius Plug-In L4-1.8L HybridYourMechanic Price$70.00Shop/Dealer Price$84.56 - $95.49
Car stays running when I shut the key off Inspection for 1987 Chevrolet Blazer V8-6.2L DieselYourMechanic Price$70.00Shop/Dealer Price$84.53 - $95.43
Car stays running when I shut the key off Inspection for 2015 Ram C/V V6-3.6LYourMechanic Price$70.00Shop/Dealer Price$84.52 - $95.40
Car stays running when I shut the key off Inspection for 1974 Lincoln Continental V8-7.5LYourMechanic Price$70.00Shop/Dealer Price$95.56 - $114.73
Car stays running when I shut the key off Inspection for 1972 Dodge Dart L6-3.7LYourMechanic Price$70.00Shop/Dealer Price$84.59 - $95.52
Show example Car stays running when I shut the key off Inspection prices

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