Q: When I give my car gas and let off it keeps throttling up by itself, I changed the tps sensor no help

asked by on

When I give the truck gas and let off the throttle keeps goin up by itself. Changed the tps sensor but no help
My car has an automatic transmission.

In the majority of vehicles, engine idle speed is controlled by an idle control valve (ICV). The ICV valve can fail or a faulty or blown fuse in other electronically controlled systems can cause the IAC motor to malfunction, leading to a higher than normal engine speed. Failures in the ICV valve itself are often due to excessive carbon buildup in the intake manifold. Other possible causes of uncommanded high engine speed include vacuum leaks, a malfunctioning throttle and, rarely, a PCM/ECM malfunction. With regard to vacuum leaks, on a fuel injected engine a vacuum leak will cause higher engine speed as the engine’s oxygen sensor detect the extra oxygen entering the engine through the vacuum leak. The newly lean (too much air relative to fuel) status will result in the engine’s computer pumping in additional fuel, resulting in an abnormally high speed. If you desire that this problem be diagnosed by a certified Mechanic, dispatched by YourMechanic right to your location, please request an engine speed diagnostic - high idle/uncommanded high RPM and the responding certified mechanic will get this taken care of for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

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
  1. Home
  2. Questions
  3. When I give my car gas and let off it keeps throttling up by itself, I changed the tps sensor no help

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

Q: My truck cranks but does not start - 1997 Dodge Dakota

Hi there. Usually, a no start issue is caused by either fuel or spark - not both. When this occurs, it's typically an issue with the central ECU failing to send the right signal to fuel related components and the...

Q: Q: Transmission issues

Hello. If the shifter itself is not moving then the linkage may be binding so that needs to be checked out first. Most of the time the joints in the linkage will cause this when they fail. If the transmission...

Q: Q: Exhaust manifold

These manifolds have 4 bolt holes and may have two bolts and two studs that have nuts with washers.

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.