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Discussion Starter #1
My current 2014 Hyundai gen coupe 2.0T is sitting at 80,000 miles it has had a transmission fluid replacement and that's about it. I was wondering what maintenance should I get done to the car to get it running well. The car is running kinda sluggish and feels like its not at its full capacity.
 

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Advenio Pariter
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3,871 Posts
I tend to do my servicing at earlier than recommended intervals. For me:
Change the fluid in the differential
Change the serpentine belt
Change the air filter (*)
Change the spark plugs (*)
Check the PCV
Test the brake fluid
Clean the cooling system and change the fluid
Clean out the throttle body (*)
Decarbon your valves (internally) (*)

(*) could affect performance noticeably
 

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Definitely check and clean the throttle body as well as intake valves. Can run CRC Intake cleaner thru while someone keeps engine at 2500rpm. I do this before each oil change, but my 3.8 id DI, so carbon buildup is bad. Dirty throttle body can give sluggish throttle response.
 

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I'd rather do it myself
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18,841 Posts
Valves should be pretty clean with our old school spray the fuel in first setup. But the intake will have some sludge and the TB will be icky. SeaFoam! then plugs for sure and be sure to gap them right.
 
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