Q: My 1977 chevy c10 is accelerating after i put it in park. And when i switch gear to drive it accelerates without me pushing on gas

asked by on January 08, 2018

as soon as I turn my truck on I put it on drive it will start accelerating on its own. And then when I putting it on a break when at a stoplight it's hard to g3t it to brake. It has a weird smell when I turn the car off afterwards. Even when I switch gears from Park to drive the truck kind of jumps or has to kick to start driving. Even as I'm driving I let go of the gas and the truck continues to drive in the same speed another words it does not slow down or Coast.
My car has an automatic transmission.

Engine idle speed is high Inspection $94.99 - $114.99 Get a Quote

The possible causes of this are a vacuum leak, a stuck throttle plate, or an improperly adjusted carburetor or throttle linkage (or binding linkage). If you desire a diagnostic, and the required repairs, please schedule service using YourMechanic’s engine idle speed diagnostic - high idle and the responding certified mechanic will get this taken care of for you, right at your location. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

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


Experienced Mechanic?

Earn up to $70/hr

What others are asking

Car won't start after flooring accelerator while going 75 MPH.
Your Dodge Stratus sounds as if it may be experiencing a serious problem. The initial symptom of the RPMs jumping from maximum to 2000 RPMS, appears to reveal that your transmission has slipped out of gear. The maxing out of...
Key coming right out of ignition
If your key comes out of the ignition switch while the engine is on or in the on position, the ignition switch could be faulty and may require replacement. If not repaired, this issue could start to cause other electrical...
Car burning oil
Hi there, thanks for writing in about your 2006 BMW 750Li. The two causes of an engine to burn oil are faulty piston rings and faulty valve guides or seals. If the piston rings are faulty, this will allow oil...
What is a better battery to purchase: AutoCraft or Duralast?
Hi, thanks for your question, I'd be happy to offer my insight. Both of these batteries are well reviewed and offer the same amount of power. My recommendation depends largely on where you live and the typical climate there. AutoCraft...
Car wont start - 2009 Hyundai Sonata
Hey there. The battery and starter are key components to starting the vehicle. If the battery is weak (https://www.yourmechanic.com/services/battery-replacement), it can cause a slow or sluggish cranking if it is not providing enough power to the starter. Also, the starter...
My truck overheated - is it a bad water pump or something else?
The [water pump]https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-water-pump) should definitely be evaluated. If you start the car cold, once engine temperature gauge reads in the normal range, check to see if radiator is hot. If radiator is cool and you have a new thermostat and...
Can you tell me if my transmission is running too hot. 2014 Jeep Grand Cherokee
Hi there. The transmission temperature that you are referring to is normal. The transmission on this vehicle does run slightly higher than the cooling system temperature. Most of the time it should run about 210-220. If you want to get...
transmission filter needs replaced.
Hi there. The best thing that you could do is remove the filter from the vehicle and take the filter to a local parts store and have them match up the filter with a different filter.
Does a turbocharger takes long to install
Hi there. The process of installing a new turbo can take quite some time - but only if your car has not had a turbo on it before. In many cases, when a car is taken to a 'mechanic shop',...

Related articles

The Best Used Cars to Buy If You’re Single
When When you’re buying a vehicle that needs to meet the requirements of all kinds of passengers the process can prove to be rather tricky. However, if you happen to be single, you’re the one in control, and your list...
The Best Used Cars to Buy If You Have a Tiny Parking Space
In In many cities parking spaces come at a premium, so you only want to purchase one small space. This small space will end up dictating what vehicle you purchase, so we’ve rounded up some great candidates. Must-haves Arm yourself...
The Best Used Cars to Buy If You're a General Contractor
If If you're a general contractor, you probably aren’t in the market for a used car. More likely, you’re looking for a pickup truck, because you need to haul equipment and supplies to various job sites. Most contractors will likely...