Q: Throttle body position is at 40% at idle and I just replaced tbs

asked by on

I was going to replace fuel injectors and decided not to, I took the injectors out but left them on fuel rail. I decided not to replace them and put every th in back in place. After I did that, it now idles at 2000rpm and I can accelerate to 40 mph without even touching the accelerator. I just replaced the tbs and it is still doing it. Put a scanner up to it and it reads the throttle is at 40%. Please help
My car has an automatic transmission.

You need to check the throttle plates and see if they look like they are open without touching the gas pedal. If they are, then disconnect the throttle cable and see if the plates close. If it closes, then you have a problem with the throttle cable not having been put back on correctly, or the pedal at the cable connection needs to be looked at for being out of position.

If the throttle body plates stay open even after the cable is disconnected, then you may have put the TPS on wrong and need to remove it and see if the plates close. If it still stays open, then the throttle body may be binding and needs to be replaced.

I recommend calling a mechanic to come look at it for you, starting with an inspection of your high idle condition.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
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. Throttle body position is at 40% at idle and I just replaced tbs

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: Brake lights are not illuminating.

Most likely the brake light switch has failed. My advice is to have a mechanic, such as one from YourMechanic, test the brake light circuit and replace the brake light switch.

Q: Climate control module. Heater core

Faults in electronic or mechanical control components in the HVAC system have no effect on the heater core in the passenger cabin. The heater core itself is not a component that would looked at as a cause of engine overheating....

Q: Noises around serpentine belt

Hello. Using a small hose would help to isolate the noise. You can hold one end to your ear and the other to each pulley to listen for the noise. It is common for the balancer to not spin true...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.