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Roy
Roy, import/domestic specialest
Category: Hyundai
Satisfied Customers: 4846
Experience:  ASE master tech for 40 years
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M y 2006 Sonata is cranking longer than usual before

Customer Question

M y 2006 Sonata is cranking longer than usual before starting. Changed plugs and no difference. No check engine light is displayed. Car has 160k.
Submitted: 10 months ago.
Category: Hyundai
Expert:  Roy replied 10 months ago.

good evening my name is ***** ***** I will assist

2 things come to mind. fuel pump may be weak or the check valve in the pump is bad loosing prime while sitting.

the other is the crank sensor. it may have a cracked end making it work intermittently.

Roy

Customer: replied 10 months ago.
From my online research this seems to be a common occurrence for high mileage 2006 sonatas. Many people inquire about this problem but no one has received a solid answer. I thought there would've been a known solution for such a common problem. A Hyundai dealer will never tell even though they've delt with job before. I fuel pressure is normal, I guess I'll check the valve. Seems plausible.
Expert:  Roy replied 10 months ago.

I would check the pressure first

Roy

please dont forget to rate me as it is the only way I get paid for my efforts

Roy