Sluggish on take off

Tiny
MARTINJONES
  • MEMBER
  • 2009 HYUNDAI SONATA
  • 2.0L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 160,000 MILES
When I accelerate from being stationary the car is sluggish until the turbo kicks in and then runs alright, but sometimes engine has a slight cut out when driving and 60 kms or under. Also is worse in hot weather. Car is a 2l turbo diesel.
Saturday, November 9th, 2019 AT 7:05 PM

5 Replies

Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
Hello,

I would recommend changing the spark plugs, and the the air filter on your vehicle. Spark plugs usually do not last as long in a forced induction environment like like do in a naturally aspirated engine. Air cleaners are an easy tune up fix, and are often overlooked, but are extremely important in an engine's operation. I make these recommendations as I have a forced induction vehicle myself, a supercharger Mustang Gt, and am very familiar with how a forced induction engine operates. Here is a link below explaining how to this:

https://www.2carpros.com/articles/how-to-tune-up-a-car-engine

Please get back to us with how everything turns out.

Thanks,
Alex
2CarPros
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Monday, November 11th, 2019 AT 6:59 PM
Tiny
MARTINJONES
  • MEMBER
  • 3 POSTS
Hi, thanks for the reply, but my car is a 2.0ltr diesel not petrol and doesn't have spark plugs. Any more advice?
Thanks, Martin
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Monday, November 11th, 2019 AT 10:15 PM
Tiny
MOTOR MASTER
  • MECHANIC
  • 279 POSTS
Hello my name is Dave.

The first thing we need to find out is if there are any trouble codes in the computer. I have attached a link to our tutorial on retrieving these codes.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

I would highly recommend checking for codes even if you don't have a check engine light on as sometimes there will be stored codes that can guide us to the issue even though the light isn't on currently. I suspect you are getting to much fuel and therefore once the turbo spools up and provides boost there is enough air for it to run properly. My first suspect would be the boost sensor (manifold pressure sensor) telling the computer there is boost when there isn't, this would cause it supply more fuel than required. If you can check for those codes and get back to us we will be glad to help you the best we can. We look forward to hearing back from you and thank you for using 2CarPros!
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Tuesday, November 12th, 2019 AT 4:31 AM
Tiny
MARTINJONES
  • MEMBER
  • 3 POSTS
Hi, thanks for your reply. How do I check for codes?
Thanks, Martin
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Tuesday, November 12th, 2019 AT 10:29 PM
Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
Hello again,

Here is a link below explaining how to pull codes from your vehicle using a code reader:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

There will be codes stored if your Malfunction Indicator Lamp[MIL] or "check engine" light is illuminated. If you do not have a code reader, you can go to your local auto parts store, like AutoZone, and they will read the codes for you for free. Please get back to us with what you find out and we can go from there.

Thanks,
Alex
2CarPros
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Wednesday, November 13th, 2019 AT 12:20 AM

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