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?
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: Low rpm & stalling

This is often times related to what is called an idle air control module which regulates the air flow at idle as the air enters the intake system and is mixed with fuel before being injected into the motor. When...

Q: I am replacing my front shock absorbers on my 2002 GMC Sierra 1500 SLE and the shocks i bought to replace them are not long enough

If your vehicle has the crew cab, the original GM part number for the shocks on your model (as equipped with coil springs) is 89038652. If your vehicle does not have the crew cab, use GM part number 89038595. These...

Q: Car is running hot, I have replaced the relay, the thermostat, the radiator, the cooling sensor, and water pump.

Hi Jessica. When an overheating problem occurs, it can be due to multiple issues such as obstruction of debris inside the heater core or coolant lines, air bubbles in the coolant lines or failure of the radiator fan. Before you...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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.
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.