Skip the auto shop - Our mechanics make house calls

Q: Why is a mechanic telling me he has to flush my throttle body assembly replacement after installing a new one

asked by on

I think I'm getting robbed after replacing throttle body assembly he then said he has to flush the system at a tune of $250 why he's done it twice now

My car has 50239 miles.
My car has an automatic transmission.

Things like this are most often a product of miscommunication. Not all mechanics are good at communicating what they are doing or what needs to be done with these complicated machines. For this reason, I can’t be certain what exactly is going on, but I can make a few guesses. The throttle body may have coolant hoses running to it. This is common and it helps your car run smoother faster when it is cold. To help your answer this question, check the condition of the cooling system or ask the previous mechanic to give you their assessment. If it is not good, maybe this is what he is flushing - the entire cooling system.

It is possible that there is a lot of carbon build up just inside the throttle body assembly in the intake manifold. It wouldn’t be likely with a 2014 at 50,000 miles, but circumstance could create such a problem. It maybe necessary to remove the intake manifold to do this.

If your not trusting of the mechanic you are using, there is nothing wrong with getting a second opinion. If you do, hopefully your guy won’t get mad about it. This is actually a good test of his character. I for one welcome second opinions. But keep in mind, if the second opinion differs from his, this still doesn’t mean he is a crook. We often get labeled as such because of poor communication about a complicated machine in a complicated industry.

If you should require our assistance, I recommend having another inspection of the throttle body. You can have him finish the install and have someone else take it from there. Be sure to send a note to the technician with YourMechanic explaining the details of what you require.

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!
  • Home
  • Questions
  • Why is a mechanic telling me he has to flush my throttle body assembly replacement after installing a new one

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: Car will not crank or start

A no crank situation can be caused by a couple of different components. The ignition switch may be shorted or worn internally. It may be able to power accessories in the On position, but the Start position within the switch...

Q: I have a CX5 2014 and the fob cannot lock the car after theengine is turned off and every one is exited. It gives a beep sound..

Try another fob if you have one. Vehicles are typically sold new with two fobs. If it works properly with the second fob, then the issue is with the first one. It may be as simple as a weak battery...

Q: O2 sensor causing misfire.

Hello. If you have a misfire, most of the time that will set a misfire code. If the only code that comes up is an O2 sensor code then you may have a bad oxygen sensor or you might have...

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.