V6 Hesitation

[John Lipari]

I have a hesitation sometimes when nailing it from a rolling stop. i read something here about a flash fix from the dealer.Now i can not find it again.What is a flash fix? I am going in for an oil change next week and want to have this fix done but i know the dealer will say they have know idea what i am talking about. If I can get the info here I can print it and show it to them. Thank You

 

[Mark_888]

Are you sure you heard about that for the sedan, or was it the coupe? I have not heard of any ECU fix for that on the V6 sedan.

 

[CHFM]

I have a hesitation sometimes when nailing it from a rolling stop. i read something here about a flash fix from the dealer.Now i can not find it again.What is a flash fix? I am going in for an oil change next week and want to have this fix done but i know the dealer will say they have know idea what i am talking about. If I can get the info here I can print it and show it to them. Thank You

There's not a service bulletin or update for that,these cars are drive by wire and i have never seen any drive by wire vehicles the dont have a little hesistation in them.

 

[jabrown6940]

There's not a service bulletin or update for that,these cars are drive by wire and i have never seen any drive by wire vehicles the dont have a little hesistation in them.

I had an Acura TL that was drive by wire and had no hesitation. My 4.6 has the same hesitation the OP has under that same condition. Very scary in certain situations.

 

[Canadian]

I have a 3.8 and have also noticed the hesitation. I suspect it's the transmission unsure what gear to use. With the tranny in Auto mode, it upshifts very quickly to maximize gas mileage. 6th gear kicks in around 35 mph (60km). When decellerating it downshifts really slowly - I've noticed it is still in 3rd or 4th at 5 or 10 mph. So when making a rolling stop or slowing at a merge, the transmission seems to pause for a second when you hit the gas. I assume it's thinking....like "oops - I'm in 4th gear and should be in 2nd". I think Hyundai could solve the problem by adjusting the computer to downshift earlier. This is my first (and possibly last) automatic car so I don't know if this is normal behaviour in a big, powerful sedan.

 

[jonah]

I was going to start a new thread about this but figured I'd stick it here since we're talking about the tranny...

I've noticed the hesitation off idle throttle also but what annoys me more is the aggressive upshifting. It's bad enough when you're accelerating from a dead stop, but if you have been driving along then slow down then accelerate again it's ridiculously quick to upshift.

There is a 90 degree corner near my house I drive around nearly every day and every time I complete the turn then try to speed back up at a reasonable pace the car shifts up to 5th gear at around 25 MPH, lugging the engine down to right at 1000RPM. It is still speeding up, but very slowly. If I want more, which I always do, a slight increase in pedal pressure will induce a downshift and off we'll go, but it is so annoying to have to drive like that, especially in what is otherwise such a nice car.

Maybe the ultra-low RPMs gave Hyundai the fuel burn or emissions it needed for certification/marketing but a TSB for an ECU update wouldn't have to change what they put on the showroom floor, only customers who complain need get the update. I want an ECU update to prevent this behavior. Let's start a campaign to make it happen.

 

[Mgrig]

Count me in. It has become annoying, at first I thought the car was still "learning" my driving patterns, but no one drives like the car shifts.

 

[Gimli]

If I want more, which I always do, a slight increase in pedal pressure will induce a downshift and off we'll go, but it is so annoying to have to drive like that, especially in what is otherwise such a nice car.

So you want Hyundai to try and fix the way you drive the car by reprogramming it?

To me the solution is simple: if you want more power, tell the car by pressing down on the gas pedal. You even confirmed it works just fine. I don't see how Hyundai could possibly offer ECU updates customized for every Joe, Jim and Bob out there.

 

[jonah]

So you want Hyundai to try and fix the way you drive the car by reprogramming it?

To me the solution is simple: if you want more power, tell the car by pressing down on the gas pedal. You even confirmed it works just fine. I don't see how Hyundai could possibly offer ECU updates customized for every Joe, Jim and Bob out there.

Thanks for your helpful advice but I don't think you understand the problem.

I already tell the car I want a certain level of power by pressing down on the gas pedal. The problem is that instead of accelerating at a proportional rate the car immediately upshifts. This bogs the engine down and causes it to generate less power than it would have if it had been allowed to rev higher. It feels very artificial. The only way around this is to push down hard enough to accelerate hard, then the car will stay in the lower gear. But I don't want to have to go zooming around like some teenager just to get the tranny to shift properly.

This car has a wonderful transmission, but one aspect of its programming could be greatly improved. Light throttle moderate yaw shift points.

Every Joe, Jim and Bob would benefit even if they didn't know there was a problem to begin with.

 

[SCVDon]

Welcome to the world of government mandated fuel standards. Hyundai is no doubt more interested in being able to report higher fuel economy vs. high performance with a 4 door sedan. So transmission is programmed for fuel economy. Makers are forced to use every trick to get fuel economy up. My 6 speed manual 6 liter 2006 GTO even has a lockout preventing shifting into 2nd or 3rd from 1st unless you nail the gas. 1st --> 4th unless you lead foot.

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[ImInPA]

I noticed this same "hesitation" in virtually every vehicle I test drove. The worst in this regard was the Mercedes C with the 7 speed automatic. I think that is one of the few things an automaker can do to meet the ever-more-stringent fuel economy regulations. It is frustrating, but, I found for myself that I adjusted to this pretty quickly. I do not know if they still do this, but for a while, the Corvette would jump from 1st to 6th depending on throttle position in an attempt to get the highest mileage. I do not think it is a "problem" with the Genesis, as I experienced this same behavior in numerous other new vehicles.

 

[Sal Collaziano]

Maybe this is something that an aftermarket performance chip could fix... Which vendor do we ask?

 

[jonah]

My 6 speed manual 6 liter 2006 GTO even has a lockout preventing shifting into 2nd or 3rd from 1st unless you nail the gas. 1st --> 4th unless you lead foot.

Wow, really?!

It is obviously not impossible to fix this issue, an ECU update is entirely within Hyundai's capabilities. I'll be the one not holding my breath. Probably nothing will ever be done about this regardless. I've actually started driving with the transmission in manual mode more often, it really work fairly well. Kinda fun to hear the engine rev. I wish I could teach it how to shift automatically the way I would shift manually. I know it has a "learning" function but I don't think it's very authoritative.

 

[Nabber]

I would pay for a good ECU update. God forbid the rear wheels spin in 1st. It seems to hit the limiter, then drop a 1k RPM while it attempts to stop the wheel spin. I WISH I could turn off the ESC!

Maybe this is something that an aftermarket performance chip could fix... Which vendor do we ask?

 

[John Lipari]

Re: V6 Hesitation,fash fix

I took my car in at 7,500 mi,yesterday for oil change and tire rotation. i told them about the hesitation. they performed "reprogram on ECU,update for logic improvment misc". This seems to have helped but I'm going to have to look at at over a longer period of time,i will report back. I gave them seven quarts of Mobil One,extended wear and they only used five quarts,I thought this engine used more oil,the manual said 6.9 quarts.

 

[moose66]

Re: V6 Hesitation,fash fix

I took my car in at 7,500 mi,yesterday for oil change and tire rotation. i told them about the hesitation. they performed "reprogram on ECU,update for logic improvment misc". This seems to have helped but I'm going to have to look at at over a longer period of time,i will report back. I gave them seven quarts of Mobil One,extended wear and they only used five quarts,I thought this engine used more oil,the manual said 6.9 quarts.

Did they change the filter? Even if they didn't, I am like you . . . . . . . . that still doesn't seem like they used enough oil.

 

[Mark_888]

The 3.8 V6 takes 5.5 quarts for change. V8 takes more, not sure how much.

But one thing that is weird about the V6 is that the oil drains back into crankcase from the top-side filter, so my factory fill showed about 1/2 quart high after sitting for a few minutes. So they may have been fooled into thinking that the 5 quarts is enough since that might show a full on the dipstick (or maybe they overfill at the factory?).

 

[John Lipari]

Yes they did change the filter,i checked the oil 10 mins after i turn the car off and it shows full with only 5 quarts. To report back on the hesitation problem,after the flash update it's about 60 to 70 percent better. i heard there is, whats called an illegal update,it's called that because you lose two mpg. I do'nt know if i will ask the dealer to do it or not,i may just get learn to live with it as it is now.

 

[jonah]

To report back on the hesitation problem,after the flash update it's about 60 to 70 percent better. i heard there is, whats called an illegal update,it's called that because you lose two mpg. I do'nt know if i will ask the dealer to do it or not,i may just get learn to live with it as it is now.

glad it made an improvement! what exactly feels better about it now? it is just the dead-stop acceleration or did something else improve too? do you have the invoice for the ECU update so we can know exactly what was done?

I'd be all about getting this done if it really does make a difference.

 

[ctrcbob]

I have the V8, with about 8000 miles on it now. I've had this happen to me about four or five times, from a dead stop. (Normally when I'm turning from a side street on to a major street with traffic) I step on it and nothing. Ease up then step on it a second time, and it goes. Like I said, normally, from a side street, turning on to a major street, but once, when crossing a major street. Always from a full stop.

Don't like "Drive By Wire"!