How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Mike Kelly Your Own Question
Mike Kelly
Mike Kelly, Hyundai Mechanic
Category: Hyundai
Satisfied Customers: 278
Experience:  17 years experience as an auto mechanic, foreign and domestic. 5 years running my own repair business.
Type Your Hyundai Question Here...
Mike Kelly is online now

Hi there i have a 2008 i30 1.6crdi and when hot it will ocassionally

Customer Question

Hi there i have a 2008 i30 1.6crdi and when hot it will ocassionally leave plumes of grey/blue smoke out the exhaust for a few minutes at the time. it is a significant lot of smoke and happens at all revs whether under boost or coasting. Then it gets ok as quick as it started. It could be fine for a day (a hundred kms or so) and next it could occurr 4 times in the same distance.
I got it plugged in whilst it was smoking furiously and found the only issue was the boost pressure sensor reading a steady 1000. The differential pressure for the DPF reads the same both sides. I thought it might be regenerating due to differential pressure.
I removed the intake to the turbo and the turbo turns freely
Submitted: 4 years ago.
Category: Hyundai
Expert:  Shantal-Mod replied 4 years ago.


I've been working hard to find a Professional to assist you with your question, but sometimes finding the right Professional can take a little longer than expected.

I wonder whether you're ok with continuing to wait for an answer. If you are, please let me know and I will continue my search. If not, feel free to let me know and I will cancel this question for you.

Thank you,


Expert:  Tom replied 4 years ago.
Hi I'm Tom and I'm here to assist you . Is the engine light on when this happens ?