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Engine starting and acceleration problem

Tiny
VIJAY KUMAR2
  • MEMBER
  • 2009 HYUNDAI SANTRO
  • 1.1L
  • 4 CYL
  • 2WD
  • 100,000 MILES
Vehicle listed above is a GLS model, India. When I start car I need engine warm up to run, without warm up engine shuts off. When I press acceleration pedal slowly engine missing, engine not hesitate to start. It has happened on both CNG and petrol. Having new spark plug.
Engine oil Castrol 10w40 synthetic.
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Thursday, March 5th, 2020 AT 1:47 AM

1 Reply

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
Unfortunately we don't have specific info on your vehicle because it is not offered here in the USA. However, this sounds like one of two issues. First, it could be a fuel related issue. I would start with checking fuel pressure.

Here is a guide that talks about this:

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Second you could have a vacuum leak. Here is a guide about this issue:

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

I would suggest starting with these two and going from there. If you prove them out then I would check for codes and see if there is a possible sensor issue.
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Thursday, March 5th, 2020 AT 3:01 PM

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