Skip the auto shop - Our mechanics make house calls

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 1000 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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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 front passenger side is making a metal grinding type noise do i need bearings replaced or should i get a second opinion

Hello, the hub bearing could be failing. I would not drive the vehicle until it is inspected for the noise. This bearing is connected to your wheel and tire. If you'd like, a certified Your Mechanic Technician can come to...

Q: Why does my car give a kick back?

Hi there. The most common thing that I have seen that causes this on your vehicle is a bad engine mount. When one of these fails the engine can move when it is started or when shifting gears. When this...

Q: Crazy idle

Hi There, It sounds like you may have a dirty or failing idle air control valve. The idle air control valve monitors the air intake as it is mixed with fuel prior to being injected into the engine at low...

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...
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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...