The i30 Owners Club

Cold start only with accelerator pedal help

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Offline PoorFellow

  • 1st Gear
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    • Posts: 3

    • dk Denmark
      EU
Hi ,  I bought a 2010 HYUNDAI I30 CW 1,6 CRDI U2 , 300.000 Kilometer  , I sort of got screwed in the deal as seller stated that car had been serviced but I suspect that it has not.
It started fine though until recently it has begun only cold starting if accelerator pedal is pushed a little else it just turns , but when accelerator pedal is pushed a little then at the moment apparently no problem.
It starts just fine when warm or lukewarm !

While I do have some basic general knowledge of diesel engines then I have absolutely no knowledge of car diesel engines with all that they entails so I hope that someone could please give me a tip here as what can be the most likely cause of the problem !?
« Last Edit: January 29, 2022, 16:16:47 by PoorFellow »
  • 2010 HYUNDAI I30 CW 1,6 CRDI U2


Offline BrendanP

  • Technical Advisor
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    • Posts: 377

    • gb United Kingdom
      East Midlands
It may be that some or all of the glow plugs have failed so that there's no pre-heating of the cylinders. The engine will start eventually but may take several seconds of cranking before the fuel ignites. Less noticeable when the engine is warm. My old car has now covered 370,000 km and none of the glow-plugs have ever been changed but it never fails to start. Changing the glow-plugs wouldn't necessarily be part of a service. A garage might diagnose a glow plug fault and tell the owner but they might not want to pay to change them as long as the car still starts. There is also a risk when trying to change the plugs that they can break off in the cylinder head, which could be very expensive to repair.
  • i30 CRD


Offline PoorFellow

  • 1st Gear
  • *
    • Posts: 3

    • dk Denmark
      EU
It may be that some or all of the glow plugs have failed so that there's no pre-heating of the cylinders. The engine will start eventually but may take several seconds of cranking before the fuel ignites. Less noticeable when the engine is warm. My old car has now covered 370,000 km and none of the glow-plugs have ever been changed but it never fails to start. Changing the glow-plugs wouldn't necessarily be part of a service. A garage might diagnose a glow plug fault and tell the owner but they might not want to pay to change them as long as the car still starts. There is also a risk when trying to change the plugs that they can break off in the cylinder head, which could be very expensive to repair.

Thanks BrendanP ,
yes , 'glow plugs' had also crossed my mind but I discarded it since it appeared that it helped pushing the accelerator pedal when starting, which in turn to the mechanic makes no sense since he claims that the accelerator is electronic on the car, so I dunno.
But I guess that I have to try to see if I can get to the glow plugs and measure if they resistance are OK or if they appear to be gone.
I just got the car a little more than a month ago so I really do not know that much about it or about the quirks of these diesel engines but I understand that also a fuse can blow so maybe I should check that too.    I just don't know much about these engine types so it will take me a lot of ownership to get to know it / them.   :)
Thank you very much for taking your time and for the kind answer !
  • 2010 HYUNDAI I30 CW 1,6 CRDI U2


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