How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask jan73 Your Own Question
jan73
jan73, Auto Service Technician
Category: Car
Satisfied Customers: 532
Experience:  ASE certified, 7 years of european high-line car experience
1689875
Type Your Car Question Here...
jan73 is online now
A new question is answered every 9 seconds

Engine has a rough idle when turning AC on.

Resolved Question:

Engine has a rough idle when turning AC on.
Submitted: 6 years ago.
Category: Car
Expert:  jan73 replied 6 years ago.
You will have to clean the IAC (Idle air control) valve and the throttle body.
jan73 and 7 other Car Specialists are ready to help you
Customer: replied 6 years ago.

I replaced the IAC valve with a new one; cleaned throttle body; no improvement at all.

 

Expert:  jan73 replied 6 years ago.
Did you check the engine mounts? Sometimes what happens is when there is a larger load on the engine (and if the mounts are weak), it may cause excessive vibration and may feel rough.
jan73 and 7 other Car Specialists are ready to help you
Customer: replied 6 years ago.
I'll check it out.