100% Free

No Scanner Needed

Carly logo

LMBaumannRider

2017 Hyundai ix20 Diesel Experiencing Drop in power and Engine Instability: Potential Swirl Flap Control Error?

Loud hissing on acceleration

|

Loss of engine power

|

Check engine light on

|

Shaking while idling

|

Unsteady engine

|

Jerking on acceleration

Hey! Having some trouble with my 2017 Hyundai ix20 Diesel that's racked up 32,603 km. My check engine light just popped on, and I've been noticing a drop in power, unsteady engine, and a good deal of jerking and loud hissing sounds when I accelerate. The shaking whilst idling has me worried too. Had a rough experience with my last mechanic, so hedging my bets this might be a swirl flap control error on the intake manifold. Had anyone here had similar issues? How did your mechanic handle it? Need some advice before I take her in again. Cheers!

4 comment(s)


FlorianKell91

Hey! Sounds like you're on the right track suspecting a swirl flap issue. Experienced something similar with my 2014 Hyundai i30 Diesel. Had the same symptoms - rough idle, lack of power, that annoying hissing sound. We concluded that it was indeed a broken swirl flap on the intake manifold. It's a pretty serious issue as it impacts overall engine performance and even fuel economy. The garage replaced the problematic swirl flap system to restore to its original working condition. Remember, these swirl flaps control the flow and intake of air-fuel mixture to optimize combustion. So when they go wrong, your car can act out pretty badly. My advice is not to delay taking your car in - these things tend to get worse if not addressed. More importantly, be clear about your suspicions and symptoms you observed when you talk to the mechanic. They'd appreciate the clues and it could save them some diagnosis time. Cheers and good luck!

LMBaumannRider (Author)

Hey there, Sounds like you've walked a mile in my shoes! I had the same weird hissing and jerking, really unnerving, right? So your garage opted for a total swirl flap replacement, huh? That’s what I'm leaning towards too. Out of pure curiosity, do you remember how much you coughed up for the whole fix? And have you noticed any new quirks in your i30 since the repair? Really want to be prepared before I roll up to the mechanic again. Thanks for the advice!

FlorianKell91

Hey there, Yeah, that hissing and jerking was really something, wasn't it? Had me on edge the whole time! And you bet, my garage went full throttle on a swirl flap replacement. It really looked like the only viable option considering the circumstances. And yep, to ease your curiosity, that fix tossed me back a bit, around 865.00 €. But hey, since the repair, I've had no more troubles on my i30! No jerking, hissing, or drop in power - she's been running like a dream. Just remember to go over your exact symptoms with your mechanic, it'll help speed the diagnosis along. Good luck with your ride!

LMBaumannRider (Author)

Hey! Pressure off my shoulders, knowing your i30's been alright since the fix! If that's the price for a smooth ride, I'm all in. Your advice has been spot on. I'm heading to my mechanic with a solid suspicion, due to the similar symptoms. Will keep you posted. Thanks for the backup, bud. Let's hope my Hyundai ix20 Diesel takes the repair well as your i30 did. Fingers crossed. Cheers!

Let our mechanics help you!

Car Brands
carly-logo

© 2025 Carly Solutions GmbH & Co. KG. All rights reserved