Q: Rough idle sucking noise - 1989 Plymouth Acclaim

asked by on

My car idles very rough and has now power. It also makes a sucking noise from the throttle body. I think I fixed all of the leaks in the vacuum system. I have trouble starting my car, but I get it going by flooring the gas pedal when I start it. I cleaned the vacuum lines, replaced the map sensor which had a bad code and replaced the Exhaust Gas Recirculation. Doing all of this hasn’t done any good for my car. Do you have any idea what else it could be?

Hi there, thanks for writing in. If the loud sucking noise isn’t coming from the large throttle body bore, you may still have a vacuum leak present. Any leak after the throttle opening will cause performance issues. The leak can even be at the throttle body seal. If you’d like us to check on this issue for you, a certified mechanic can come to your home or office and smoke test your vehicle to uncover and minuscule leaks, and further inspect the noise issue. If the issues lies with the throttle body itself, we can also replace the throttle body for you.

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. Rough idle sucking noise - 1989 Plymouth Acclaim

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: fixing flexplate

Hi there, thanks for writing in about your 2002 Mitsubishi Lancer. The big flex plate goes first, then the small plate and bolts to hold it all on. The small plate is made to support the large plate from cracking...

Q: Throttle body failing - 2004 Honda Accord

Hello. This may be related to a variety of things such as a vacuum leak (high idle is caused by this many times), a faulty mass air flow sensor, a failing throttle body sensor. The fact that it wants to...

Q: Stalling issue and hissing sounds.

Hi There, It sounds like you definitely have a vacuum leak. High idle speed, stalling and hissing sounds are common signs of a vacuum leak. When a vacuum leak is present in an engine, this causes an excessive imbalance in...

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 Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...