Acceleration Issue

[Aayush]

Well this is fun! Now I have exactly this problem, dead throttle/ hesitancy pulling away and revving to 5000 rpm with no acceleration so Genesis took it in and I have a hole in my intercooler as well, and living in the remotest capitol on earth means the usual wait times for parts, even though I am being stiffed for the intercooler and fitting Genesis has given me a car but my take on the whole issue is 1, far too many cars are getting debris strikes on their intercooler, 2, this anecdotally looks far more likely that the throttle problem is coolant based not throttle body based as per another post but I will wait and see when mine is fixed. The lack of any kind of warning is also most concerning.

So glad I took the time to read all the comments on acceleration thread issue. Have the exact same issue, been dealing with it since Dec 23, and over 5k miles. Dealer had the vehicle for 6 weeks and didn’t find anything wrong, no DTC or lights until I had to take it again, this time there was a DTC for Coolant Pump malfunction with coolant everywhere. This is when the vehicle was maxing out at 45mph with wide open throttle. Was told there’s a hole in the intercooler and radiator due to a rock. In all the years of driving haven’t heard it happen. Thought it was a one of occurrence, clearly it’s not with so many people having the same coolant leak issue due to damaged intercooler. This doesn’t sound like a customer driving issue but rather a design issue.
The issue was intermittent until it wasn’t. So yes, it’s unacceptable that the onboard diagnostics don’t let us know there’s a leak or performance degradation. The replacement costs $1500 and isn’t covered by warranty and it took them 2.5 weeks to figure out after seeing the damage that’s it’s not covered by warranty. The other time 6 weeks wasn’t enough to notice that while the vehicle was at the dealership. So much for a luxury brand.

 

[axle]

So glad I took the time to read all the comments on acceleration thread issue. Have the exact same issue, been dealing with it since Dec 23, and over 5k miles. Dealer had the vehicle for 6 weeks and didn’t find anything wrong, no DTC or lights until I had to take it again, this time there was a DTC for Coolant Pump malfunction with coolant everywhere. This is when the vehicle was maxing out at 45mph with wide open throttle. Was told there’s a hole in the intercooler and radiator due to a rock. In all the years of driving haven’t heard it happen. Thought it was a one of occurrence, clearly it’s not with so many people having the same coolant leak issue due to damaged intercooler. This doesn’t sound like a customer driving issue but rather a design issue.
The issue was intermittent until it wasn’t. So yes, it’s unacceptable that the onboard diagnostics don’t let us know there’s a leak or performance degradation. The replacement costs $1500 and isn’t covered by warranty and it took them 2.5 weeks to figure out after seeing the damage that’s it’s not covered by warranty. The other time 6 weeks wasn’t enough to notice that while the vehicle was at the dealership. So much for a luxury brand.

We really must find out what's happening to these intercoolers, there is no way so many get damaged and leave no marks or damage to the car, mine was covered by insurance but I hade to pay my excess of $1000 , one though is maybe pressure washers fired directly through the gap in the lower grill but I only use a battery powered pressure washer which just isn't very powerful . Something is not quite right here is it?

 

[Aayush]

We really must find out what's happening to these intercoolers, there is no way so many get damaged and leave no marks or damage to the car, mine was covered by insurance but I hade to pay my excess of $1000 , one though is maybe pressure washers fired directly through the gap in the lower grill but I only use a battery powered pressure washer which just isn't very powerful . Something is not quite right here is it?

Clearly something isn’t right. I don’t understand how they all get damaged in the same general area. What are the odds that a freaking rock manages to fly in through the front grill or the underbody and strikes the intercooler without leaving a trace.

If we’re finding this out on forums, how is their warranty or field issues team clueless? It’s not possible they aren’t aware of it, I suspect they’re counting on us consumers not bothering to find the connection.

I asked them to show me evidence of rock damage. How does it not leave a trace anywhere else. Lots of questions. For all I know it’s either a design issue with the body that let’s in foreign objects or something under the hood in the intercooler’s vicinity shoots off under extreme pressure.

 

[joegr]

Clearly something isn’t right. I don’t understand how they all get damaged in the same general area. What are the odds that a freaking rock manages to fly in through the front grill or the underbody and strikes the intercooler without leaving a trace....

Pretty low which is why it's only happened to a few cars, but not zero. I'm not sure what evidence you are expecting.

 

[deilenberger]

Why replace the radiator? There are shops that specialize in repair of them.

That's a dying art with aluminum/plastic radiators. There used to be shops specializing in them - about 4 within 10 miles of my in NJ - now there are none. I can't imagine a dealership sending an aluminum radiator out to be "fixed" since when it starts leaking again - it's on them to make it stop.

We're both old - and old times are often looked at with rose colored glasses - but spending time in a radiator shop while they soldered the neck fitting on my Volvo PV544 radiator every 3 months isn't something I'd like to repeat..

New aluminum radiators if available aftermarket can be quite inexpensive. Typical BMW ones from Nissan are around $300 - at that price it's not worth trying to fix one (usually impossible since it's usually the plastic-tank to aluminum core rubber seal that fails..)

 

[deilenberger]

Some facts for this discussion.
The vehicle has no coolant level monitoring. Some cars have low coolant sensors, and other don't. This one is in the don't category.
It is the intercooler radiator that leaked and lost all coolant, the engine radiator was fine. There was no danger of any engine damage.

Damn it quiets things down when someone brings facts to a discussion. Does the primary cooling system have a level sensor? Just wondering. This is the first car (3.5L) I've owned with a separate liquid intercooler system - but I suspect this is a "hot-V" engine design (turbos in the V for fast throttle response)?

Cool design, removes long lengths of air-ducting from the turbos to the air to air intercoolers down by the radiator (or in the case of my Porsche - in the brake duct intakes on either side of the grille) and then back up to the throttle body.. it probably eliminates over 3' of duct for each side... making for much faster throttle response.

Good on Genesis on having a system that recognizes when the intercoolers aren't cooling and they dial back the turbos, bad on Genesis on not telling the driver that's happening and why.

 

[dhuhtala]

Well this is fun! Now I have exactly this problem, dead throttle/ hesitancy pulling away and revving to 5000 rpm with no acceleration so Genesis took it in and I have a hole in my intercooler as well, and living in the remotest capitol on earth means the usual wait times for parts, even though I am being stiffed for the intercooler and fitting Genesis has given me a car but my take on the whole issue is 1, far too many cars are getting debris strikes on their intercooler, 2, this anecdotally looks far more likely that the throttle problem is coolant based not throttle body based as per another post but I will wait and see when mine is fixed. The lack of any kind of warning is also most concerning.

I haven't had any more issues since getting the throttle body replaced, so there could be a couple of issues with the same symptoms.

 

[David Williamson]

On the 3.5 engine the turbos are on the outside of the engine. The liquid intercooler does reduce the volume of air betwen the turbos and the engine intake valves to reduce lag and it keeps the exhaust length short. The hot "V" design reduces cost with only 1 turbo for both sides of the engine but it puts the exhaust heat in a confined area and I am not sure how good that will be long term.
David W

 

[MIDRIVER]

AI SYSTEM SECURITY: Same IP address or digital footprint as the poster below.

2024 GV70 - I was having issues with our new GV70 not accelerating properly. Took it into the dealer and was told we had a rock hit the intercooler and put a hole in it. This was at 8000 miles. Paid $1800 to fix as it wasn't covered under warranty. And just today at 11,000 miles we're having the same exact issue. This is definitely a design flaw. I've owned vehicles with turbo and have NEVER had this issue once and now it't happened twice within 3000 miles. I'm completely disappointed in this brand.

AI SYSTEM SECURITY: Same IP address or digital footprint as the poster below.

 

[richa328]

AI SYSTEM SECURITY: Same IP address or digital footprint as the poster above.

Hi All!

I've read quite a few threads about this on the forum, but figured I would post my experience here as a comparison.

I am a new Genesis Owner of a 2023 GV70 2.5T Sports Prestige. I recently purchased my car last month. I do quite a bit of highway driving for my commute, and over the past month, I've gotten pretty used to how my car handles on the highway. I currently have about 2,500 miles on the car.

Just over a week ago, I started to notice that I am now having to give my car more power (having to press the pedal more) when I am passing a car, merging on the highway, or exiting an off ramp onto a main road. In the past, I've only had to lightly press the pedal when doing those things. I've noticed this issue is worse if I am merging onto a highway where the road is on a slight incline (again, I've driven the same route over the past month, and this has not happened in the same area in the past). I've also notice a slight acceleration lag of about 2 seconds when I am exiting an off ramp, slowing down, then trying to accelerate to merge into main road traffic. At times I am even having to floor the pedal to get a response. If I am at a complete stop, and then take a turn to merge into traffic, the acceleration delay only happens on occasion. Again, this has not happened in the past when I first purchased the car.

When I first purchased the car, I drove it in the default settings at start up: Comfort Mode with Auto Stop/Start on. I am now having to drive the car in Sport Mode, but even in Sport Mode, I am noticing I am having to press the pedal quite far to achieve the acceleration I am looking for to merge onto the highway. I also tried Sport Mode with Auto Start/Stop Off and am still having the same issue. I have only ever used 91 or 93 Octane fuel. I have not (yet) noticed that my car has stalled or not responded when accelerating, though with the current recall on the 2022s and older for fuel pump issues, I am feeling a bit worried that this might evolve into a bigger issue.

I reached out to the dealership where I purchased my car. Unfortunately, their first available appointment for a Genesis diagnostic is 3 months away! I left voice messages with both the manager of the dealership and with sales with no response. I reached out to another Genesis/Hyundai dealership whose service center was able to take my car in at the end of the month. They could not guarantee a Genesis loaner, but could give me a Hyundai loaner. I could care less what loaner I have, I just want to have this looked at.

While this might seem like a minor issue, the major reason why I traded my car in was because I was looking for a car with higher horsepower and good acceleration/limited lag specifically for highway driving, so this has become quite an annoyance. My prior car was a 2019 Mazda CX-5 as a comparison, and, at times, I feel like my good old Mazda gave me more power with acceleration in these same situations.

I will post an update once this has been looked at.

I

Hello All!
I've decided to update on what has happened since I last posted. After I contacted Genesis Corporate, they opened up a case about my issue. However, I didn't have much faith in what they could do for me as I had to explain to the Genesis agent(?) what "limp mode" was. After I spoke with the dealership again, they further clarified the information about the two radiators. They stated that the lower one was the one that was cracked, and it had a pretty good crack in it from the hole that a ?rock made. Unfortunately, the crack had expanded. If I had been able to bring it in sooner (which was impossible since the first appointment at this dealership was in 3 weeks and at the dealership I purchased the car at was 3 months), I likely would have been able to patch it up, but because this is still a brand new car that I wanted to hang on to for some time, I asked if I got it repaired rather than replaced whether it would hold over the next 5ish years. They couldn't guarantee this, so rather than take a risk of paying little money now, running into issues, then pay more money later, I'd rather just pay the money upfront for a brand new radiator and have peace of mind. I again asked if there was a reason why I received no warnings on my dash. They stated that they did scan for any diagnostic codes, but there were none. Basically, it appeared my car was functioning fine according to its internal computer, but it was still driving in a modified version of limp mode.
It took about a week to fully repair the damage. They did send me photos of the radiator and the damage once they removed it from the car, so once I saw those, I was glad that I decided to just replace it. They also confirmed that I indeed had no intercoolant left in the damaged radiator. Luckily the upper radiator was not damaged. When I went to pick up the car, they told me it was running just fine, but also wanted to let me know that this was becoming a common issue with these cars. After my car came in, two other cars came in for the same issue - holes in radiators - one overheated and the other was in limp mode like mine.
I contacted corporate after I received my car back to follow up on the car's failure to detect no intercoolant. They were not very helpful. First, they asked me if I knew if there were other warnings on the dash that were not working. I told her, how would I know what warnings don't work, if I don't know if there is something wrong with the car? In other words, If something is wrong with the car and no warnings come on the dash, how would I know that the warnings on the dash don't work? The only way I picked up on the fact that I had an issue was because I was able to determine that the car wasn't accelerating as quickly as it did when I first purchased it, which was a very subtle finding. I had my first included maintenance coming up for the car a month later, so they made a note to the same dealership to check the dash. When I brought it in for its first maintenance, they double checked that all fluids were topped and that the new radiator was still undamaged. They double checked for any diagnostic codes and also the dash, still nothing. I contacted corporate, and they didn't know what else to do. I told them that this needed to be filed as a major complaint as this could be a safety issue for people who don't realize that their car is in limp mode if they are out of intercoolant. They closed my case. So, end of story, there as been no satisfying conclusion about the absence of a dash warning for low or no intercoolant. However, my car has been running perfectly fine since the radiator replacement.
If anyone knows where I can file a formal complaint about this in writing, I would appreciate it!

I have a 2024 GV70 2.5L with the same problems described in this thread.

At 8400 miles, the car lost acceleration. Seemed the turbo was not functioning. Dealer evaluated the car and found the intercooler had lost all of its coolant. No warning lights ever came on as described by others.

The dealer attributed the coolant leak to a stone hit. There was a small 4mm size dent in the fins about 3" above bottom of intercooler.

The repair was not covered under warranty as it was a "road hazard."

At 11,700 miles, the same thing happened again. Still waiting on dealer to call me back.

Clearly, there is a design flaw or a manufacturing problem with these intercoolers.

For those reading this that haven't purchased a Genesis, I would avoid the brand.

I've had 5 other turbocharged cars in the last 25 years and driven them a collective 400k plus miles. Never once did I have an intercooler fail or a turbo repair.

At the rate the GV70 is going, it will need two intercooler replacements per oil change. Stay away.

AI SYSTEM SECURITY: Same IP address or digital footprint as the poster above.

______________________________

Help support this site so it can continue supporting you!

 

[G-469159]

I had to deal with the same issue. Never have I ever had this issue on any other car (random rock flying into the intercooler and making a hole). Add to it no DTC. The dealership couldn’t even figure out the issue until I opened a claim and had to take it again. Drove almost 7 month with it lagging to the point where it won’t even go over 40mph at WOT.

The amount of people that had the same damage in their inter cooler and Genesis not covering it points to a major design flaw that they’re not taking responsibility for. After they replaced the intercooler on my GV70 it ran just like brand new. But the whole experience and sheer lack of accountability had left me with zero confidence in the brand and for that matter the issue to not happen again. Had my car bought back in July, because I had already had differentials replaced 3 times by then for other issues commonly experienced by most. I was done dealing with the brand, 2+ months to get something looked at and still not be addressed.

My dealership had 3 other GV70 come in with the same intercooler damage after mine. What are the odds?

Beautiful vehicle that was rushed to the consumers without thorough validation combined with lack luster customer service and accountability of mistakes.

 

[Boy_mom]

Hello All. As promised, I've returned to post an update on the issue with my car.

I brought my car in to the dealership today to figure out what is going on with the acceleration. I left a detailed written note about the issue I am having along with print outs from two other Genesis owners who have had similar issues here on this forum. I was able to get a 2024 GV70 3.5T loaner in exchange.

I received a phone call later in the day. They had found the issue. Apparently, there is a hole in my radiator and the coolant ended up leaking out. I have been driving around in car for the last 3-4 weeks with no coolant in the radiator. Apparently, the car automatically went into "limp mode" as a result. They told me that there possibly was something that flung into the grill, pierced the bottom portion(?) of the radiator, hence the issue. I was too caught up in the notion that I had been driving around in a car for the last 1500 miles with no coolant in the radiator that I didn't dwell too much on the how. I ended up freaking out worried that I might have damaged the engine. They told me my engine was fine, but I need to replace the radiator. They told me it is not covered under warranty, and I could try to go through an insurance. I recently had to deal with insurance for a simple rear ender, which was a month's long nightmare, so I told them, no, I will pay out of pocket and go through insurance for reimbursement after. I want this fixed without delay.

The most concerning issue here was NEVER in the last 3-4 weeks when I had been having this issue did I ever receive any warning lights or notifications on the dash that there was no coolant in the radiator or that my car was in limp mode. NEVER!

This is a serious safety issue. Because, how would I know in the future if there is an issue with the car, or if fluids are low if I don't get a notification on the dash? I expressed as much on the phone with the dealership and asked what could be done. They gave me a verbal shrug and told me to contact Genesis corporate. I went ahead and opened a claim with Genesis corporate. If I can't get this resolved, I will push to have this car replaced, because they cannot seriously ask me to drive a car that cannot give me any warnings on the dash for something as simple as NO COOLANT IN MY RADIATOR!!! Never mind not receiving any notifications that I am driving in limp mode wondering why the heck this car won't accelerate appropriately. On a side note, I had also been checking my Genesis app for any diagnostic errors for the last 3-4 weeks. None registered.

I will update again once I hear back from Genesis corporate.

I am going thru the same thing!! I was having acceleration delays and took my car in they said a rock must have cracked my radiator when I saw the picture they sent me it looks like a clean break not something a rock or road debris would cause. I had no leak on the garage floor. Now they are saying I have to pay for a new radiator because it’s not covered under the warranty. Why is the grill so open inviting rocks in? Poor design. I honestly think it’s a manufactures defect.

 

[Boy_mom]

AI SYSTEM SECURITY: Same IP address or digital footprint as the poster above.


I

I have a 2024 GV70 2.5L with the same problems described in this thread.

At 8400 miles, the car lost acceleration. Seemed the turbo was not functioning. Dealer evaluated the car and found the intercooler had lost all of its coolant. No warning lights ever came on as described by others.

The dealer attributed the coolant leak to a stone hit. There was a small 4mm size dent in the fins about 3" above bottom of intercooler.

The repair was not covered under warranty as it was a "road hazard."

At 11,700 miles, the same thing happened again. Still waiting on dealer to call me back.

Clearly, there is a design flaw or a manufacturing problem with these intercoolers.

For those reading this that haven't purchased a Genesis, I would avoid the brand.

I've had 5 other turbocharged cars in the last 25 years and driven them a collective 400k plus miles. Never once did I have an intercooler fail or a turbo repair.

At the rate the GV70 is going, it will need two intercooler replacements per oil change. Stay away.

AI SYSTEM SECURITY: Same IP address or digital footprint as the poster above.

This exact thing happened to me. I agree it’s absolutely a design flaw. They currently have my 2023 GV70 told me it was a cracked radiator and of course not covered by the warranty. Even if I pay the 1167.00 what to keep it from happening again? The grill is too open and not properly protecting the radiator from unavoidable road debris.

 

[Boy_mom]

This exact thing happened to me. I agree it’s absolutely a design flaw. They currently have my 2023 GV70 told me it was a cracked radiator and of course not covered by the warranty. Even if I pay the 1167.00 what to keep it from happening again? The grill is too open and not properly protecting the radiator from unavoidable road debris.

Did they send you a picture?

 

[steveinarizona]

OK, got it. My car is not running right but I'm going to keep driving. I'm blaming the car maker for not telling me with a light what I already know.

Older cars did not have limp mode, they just stopped. Should we go back to that?

Amazing that the auto industry got this far without warning lights for everything.

As a driver/car owner, we do have some responsibility to check fluid levels, know when things are not right. I checked my oil today, just in case the light, if there is one, is burned out.

I think the OP on this one acted reasonably. His car was not acting right. He called and reported it and asked for an appointment. He was told weeks out. He was NOT told to park the car and not drive it so it was reasonable for him to assume that the dealer was telling him it was not an immediate issue and could wait until an appointment was available.

The OP is a user, not an automotive engineer (I assume). If the "idiot light" was warning him about being in limp mode, that would be a very different scenario.

 

[Boy_mom]

Clearly something isn’t right. I don’t understand how they all get damaged in the same general area. What are the odds that a freaking rock manages to fly in through the front grill or the underbody and strikes the intercooler without leaving a trace.

If we’re finding this out on forums, how is their warranty or field issues team clueless? It’s not possible they aren’t aware of it, I suspect they’re counting on us consumers not bothering to find the connection.

I asked them to show me evidence of rock damage. How does it not leave a trace anywhere else. Lots of questions. For all I know it’s either a design issue with the body that let’s in foreign objects or something under the hood in the intercooler’s vicinity shoots off under extreme pressure.

Same problem here they currently have my car (2023 gv70) 16k miles on it. said rock cracked the radiator here’s the photos they sent me

 

[Boy_mom]

Doesn’t look like a rock to me but a straight cut

 

[NorthAZ]

So I went out and looked at my intercooler radiator and it looks exactly like the one in the picture posted above. That little T in the middle is a joint between the two sides that hold the radiator fins. I do not have a leak and my coolant reservoir is full. So my question is where is the evidence of rock damage???

 

[joegr]

Doesn’t look like a rock to me but a straight cut

Look at the pink sludge at the top of where you circled. Clean all that off, and you will find where the rock punctured.

 

[AA2]

I've had this issue twice now. Started my car and something felt "off". Hesitation spurts, if you will, almost like air bubbles going through the system when accelerating. First time on the interstate cruising going 70 went to accelerate to pass someone and the rpm's went up but no acceleration. I took it directly to the dealership on my way home and they had it for 3 days. As with anything, they couldn't get it to duplicate the issue. Yesterday on my way home, same as before, luckily I was not on the interstate and restarted it at a stop sign. It corrected the issue and it's been fine. I will have them check the intercooler radiator today when I go for an oil change!