2011 Accent AT - Engine Knock!

[airolynx]

To add,

To the Accent owners na naka experience nung engine knock, maybe you can list in this thread:

a) gas station san nagpakarga
b) type of fuel na nilagay

Just so may reference din yung mga future Accent owners na mag pa fill up ng tanks nila.

[renzo_d10]

Just fill up with Shell Premium or V-Power.

Kung ayaw niyo ng Shell, gas up with Petron XCS.

Wag lang talaga Caltex. It's too clean, it evaporates easily. :hysterical: Pati Flying V, mali nga ata yung pangalan nun eh. Dapat Flying $, kasi pakarga ka ng pakarga dahil ambilis maubos or YET Flying Gas. :rofl:

[renzo_d10]

Mas perfect Tucson at Santa Fe SG!

Hehehe the cars I mentioned above have their own flaws. I guess on the Accent's issue, Hyundai should seriously look into this matter. Gandang ganda pa naman ako sa porma nung accent.

*Starex_Gold

[niky]

I think what vivafoxpro is trying to say is, why is that, cars of the same category (Fiesta, City, Vios) don't experience the same 'knocking' problem as the Accent is experiencing.

Dun sa tatlong cars na na mention ko, kahit saang lupalop man galing yung '93 RON' na gas na ikarga, hindi natotope, bakit itong Accent, ay subcompact category din, pagka selan selan sa gas.

The Focus and the Lynx are bigger cars, with engines designed for the compact category, meaning they're more expensive, so it maybe more understandable that their engines will require more expensive fuel.

But the Accent, parang siguro yung sentiments lang dun is, dapat kung pwede yung Fiesta, City at Vios sa cheap na fuel, dapat Accent ganun din.

It's likely that the Accent, having the newest engine of the bunch (the Fiesta is just as new, but fuel economy isn't spectacular), has been tuned to run extra lean at low rpms to ensure better economy.

Now, it's supposed to adapt to poor fuel, but like I said, the onboard ECU and oxygen sensors have a very limited range of adaptation (that's why stock O2 sensors are often called "narrow-band"). If it's beyond the range programmed into the car, then it will cause problems.

If this were a systemic problem caused by very poor programming, ALL or almost all Accents should do it (just as in the case of the Optra). Not all Accents are doing it... so far, we hear about a few units pinging under high load low rpm conditions, which are worst case scenarios when it comes to engine mapping. So my feelings are that it's 80% fuel related and possibly 20% the fault of Hyundai for not making the maps adaptive enough or specifying spark plugs in the wrong heat range for local conditions.

The former can't be fixed by Hyundai, unfortunately. The latter can.

By the way... you can't just use any fuel with the City and Vios. You can't use "Regular" 89 with those cars. And I've heard of complaints of pinging for some Honda owners... but not on brand new cars.

[Starex_Gold]

Mas ok pa yung lumang Accent CRDi na tinataxi

[airolynx]

It's likely that the Accent, having the newest engine of the bunch (the Fiesta is just as new, but fuel economy isn't spectacular), has been tuned to run extra lean at low rpms to ensure better economy.

Now, it's supposed to adapt to poor fuel, but like I said, the onboard ECU and oxygen sensors have a very limited range of adaptation (that's why stock O2 sensors are often called "narrow-band"). If it's beyond the range programmed into the car, then it will cause problems.

If this were a systemic problem caused by very poor programming, ALL or almost all Accents should do it (just as in the case of the Optra). Not all Accents are doing it... so far, we hear about a few units pinging under high load low rpm conditions, which are worst case scenarios when it comes to engine mapping. So my feelings are that it's 80% fuel related and possibly 20% the fault of Hyundai for not making the maps adaptive enough or specifying spark plugs in the wrong heat range for local conditions.

The former can't be fixed by Hyundai, unfortunately. The latter can.

By the way... you can't just use any fuel with the City and Vios. You can't use "Regular" 89 with those cars. And I've heard of complaints of pinging for some Honda owners... but not on brand new cars.

I get your point now niky. Thanks for clearing it out. I guess yung mga Accent owners who experience engine knock can try other gas stations. Siguro nga mga isolated cases ito. I hope our friends here who own Accents with that problem can post here which gas station they used to fill up their cars so we may know.

[airolynx]

*Starex_Gold

HAAHAHA!!! Totoo naman kaya sinasabi ko! :D Simula nga nung naging member ako ng tsikot tapos nakita ko yung mga ride ni SG nangarap na ako bigla ng Santa Fe at Tucson.

[niky]

Mas ok pa yung lumang Accent CRDi na tinataxi

And suffer turbo failure because Hyundai put in defective turbos that can't withstand taxi drivers beating the **** out of them before they warm up and shutting them down while they're still red hot? (I'm being sarcastic, here, just so everyone knows...)

[renzo_d10]

HAAHAHA!!! Totoo naman kaya sinasabi ko! :D Simula nga nung naging member ako ng tsikot tapos nakita ko yung mga ride ni SG nangarap na ako bigla ng Santa Fe at Tucson.

Mas maganda rides ko compared to SG. Inuusok ko nga lang yan sa expressway eh. 226kph FTW.

Hahahahahaha.

[renzo_d10]

And suffer turbo failure because Hyundai put in defective turbos that can't withstand taxi drivers beating the **** out of them before they warm up and shutting them down while they're still red hot? (I'm being sarcastic, here, just so everyone knows...)

Niky, baka may magalit na Vios FG ( Fangays ... ) at tanungin pa sayo ba't sila walang turbo.