I have a 2004 Hyundai Sonata with a ticking noise under the forward passenger side valve cover

Asked by Aug 09, 2016 at 08:12 PM about the 2004 Hyundai Sonata Base

Question type: Maintenance & Repair

My Sonata idles rough with the a/c on and the car in drive. I changed the Idle control valve, cleaned the throttle body, and cleaned the mass air flow. Still have a rough idle. I started the engine while cold and listen with a long screw drive. After a short while and the engine warming up it sound like the valve on the front passenger side started ticking. If so what can I do to get it to stop without doing a major overhaul. And can a sticking valve cause the engine to act like this with the a/c?

1 Answer

19,780

As far as the ticking is concerned change oil and add some Lucas Engine Oil Stablizer to oil. Do not think it has anything to do with a/c but try adding the Lucas first and see what happens it may help stop the running rough with a/c on.

Your Answer

Hyundai Sonata Experts

  • #1
    toDumbToNotKnow
    Reputation
    1,590
  • #2
    Tom Demyan
    Reputation
    1,330
  • #3
    dandyoun
    Reputation
    1,100
View All

Related Models For Sale

Used Hyundai Elantra
483 Great Deals out of 41,022 listings starting at $1,995
Used Honda Accord
1,031 Great Deals out of 60,523 listings starting at $999
Used Toyota Camry
1,041 Great Deals out of 68,980 listings starting at $295
Used Kia Optima
480 Great Deals out of 28,958 listings starting at $2,450
Used Nissan Altima
987 Great Deals out of 74,663 listings starting at $1,500
Used Honda Civic
800 Great Deals out of 72,083 listings starting at $1,400
Used Chevrolet Malibu
1,074 Great Deals out of 72,017 listings starting at $1,896
Used Toyota Corolla
866 Great Deals out of 56,853 listings starting at $1,099
Used Hyundai Santa Fe
248 Great Deals out of 13,707 listings starting at $1,995
Used Nissan Maxima
280 Great Deals out of 23,061 listings starting at $899
Used Mazda MAZDA6
159 Great Deals out of 11,289 listings starting at $1,895
Used Chevrolet Impala
478 Great Deals out of 33,615 listings starting at $777

Used Cars For Sale

2018 Hyundai Sonata For Sale
20,701 listings starting at $15,921
2017 Hyundai Sonata For Sale
77 Great Deals out of 6,430 listings starting at $11,344
2016 Hyundai Sonata For Sale
82 Great Deals out of 4,110 listings starting at $9,980
2015 Hyundai Sonata For Sale
142 Great Deals out of 4,635 listings starting at $8,500
2014 Hyundai Sonata For Sale
145 Great Deals out of 3,019 listings starting at $5,795

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.