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post #1 of 13 (permalink) Old 03-25-2019, 12:04 AM Thread Starter
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Chip tuning to fix death lag?

Hi! I'm a mechanic who works mostly on BMW, VW, and Toyota. I've seen enough 21st century Hyundais to consider them generally good cars, so when I flew across the country to see my grandparents who need a new car, a gently used Hyundai became almost the default choice. Uncharacteristically for old folks, mine want as small a car as possible - they still miss their 87 Civic - so an Accent is the prime candidate.

I testdrove a '17 Accent automatic with 18.5k on it. Everything about it is acceptable or better, except the acceleration lag. At first I wondered if it was stumbling due to an intake leak. A few hours of forum research showed that while the Sonata hybrid is the worst offender, many recent Hyundais have some degree of death lag.

Is there a chip tune that can fix this?
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post #2 of 13 (permalink) Old 03-25-2019, 08:47 AM
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Look for an electronic throttle controller. It will dramatically change the throttle response. Sprint Booster or Potent Booster are two. Not sure if they are made for the RB though. But generally they are rather generic as far as models they fit.

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post #3 of 13 (permalink) Old 03-25-2019, 08:58 AM
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First I've heard of the lag problem. My auto trans 2012 Accent is one of four vehicles that I own. It drives just like the rest of them. I've never noticed a lag. Perhaps it's something they 'added' to later models...

The Accent is basically an econo-box grocery getter. As such, there's not much in the way of aftermarket performance offerings. I've never come across any sort of tuning chips for the car.
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post #4 of 13 (permalink) Old 03-25-2019, 03:44 PM Thread Starter
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Sprint Booster says their SBHY0043S fits and goes for $300. Any experience?

Greetings in Woodlands! I used to live in Morden.
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post #5 of 13 (permalink) Old 03-25-2019, 04:22 PM
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Sprint Booster says their SBHY0043S fits and goes for $300. Any experience?

Greetings in Woodlands! I used to live in Morden.
I have a Tros Potent Booster on my Gen Coupe. it does the same thing at half cost. Best mod you can do and easy to install/remove and you can disable/change modes on the fly.

http://www.potentbooster.net/

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post #6 of 13 (permalink) Old 03-25-2019, 09:19 PM
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First I've heard of the lag problem. My auto trans 2012 Accent is one of four vehicles that I own. It drives just like the rest of them. I've never noticed a lag. Perhaps it's something they 'added' to later models...

The Accent is basically an econo-box grocery getter. As such, there's not much in the way of aftermarket performance offerings. I've never come across any sort of tuning chips for the car.
Anything under 2k rpm and the motor simply is useless. I've been in situations where you floor it from a dig and the car basically goes "sir, are you sure sir?" and then hits 2k and starts to actually wake up. It's never a good feeling.

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post #7 of 13 (permalink) Old 03-25-2019, 11:45 PM Thread Starter
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I only drove the car for ~15 minutes and didn't notice a meaningful RPM cutoff. "Manual" shifting didn't help either. "Sir, are you sure sir?" hits the nail on the head.

I drive, among other things, a 1981 Toyota 4x4 whose 90hp (when new) is asked to move 3000lb (when empty) through a transfer case, rear drivetrain, and 29" tires. It very aptly illustrates the difference between response and power; the Accent has adequate power, but the response is lacking.
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post #8 of 13 (permalink) Old 03-26-2019, 12:11 AM
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Quote:
Originally Posted by moroza View Post
Hi! I'm a mechanic who works mostly on BMW, VW, and Toyota. I've seen enough 21st century Hyundais to consider them generally good cars, so when I flew across the country to see my grandparents who need a new car, a gently used Hyundai became almost the default choice. Uncharacteristically for old folks, mine want as small a car as possible - they still miss their 87 Civic - so an Accent is the prime candidate.

I testdrove a '17 Accent automatic with 18.5k on it. Everything about it is acceptable or better, except the acceleration lag. At first I wondered if it was stumbling due to an intake leak. A few hours of forum research showed that while the Sonata hybrid is the worst offender, many recent Hyundais have some degree of death lag.

Is there a chip tune that can fix this?



I dunno about that model Accent, but on my Scion tC the "fix" was to loosen the nut at the throttle rheostat at the pedal, and turn it ~1/4". This eliminated the throttle lag.


Like I said, don't know if this would be the same for the Accent.


What I CAN say is it was a HECK of a lot cheaper than chipping the ECM!

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post #9 of 13 (permalink) Old 03-26-2019, 08:52 AM
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........ it is acceptable or better, except the acceleration lag.......
Was Economy button selected off? I always noticed some lag in throttle response with ECO on.
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post #10 of 13 (permalink) Old 03-26-2019, 10:46 AM Thread Starter
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I didn't realize it had an Eco button...?
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