Hyundai Repair Questions? Ask a Mechanic for Answers ASAP
Hopefully i can help..
From your description..it certainly sounds of a fuel system related problem - the best course of action if there is indeed no engine management lights on to signal the ecu has picked up on the fault itself.If there is a warning on then have the ecu scanned and see whats faults you have to work with to try and solve this issue or help at least as to which area needs checked out..it might be worth at least having the fuel system checked out inc fuel filter replacement and fuel pressure test..it could be during or over night the fuel system especially so if this is a diesel engine could be loosing pressure and thus you get the fault at first start or after starting.it would also be worth to having the egr valve "exhaust gas recirculation valve" checked to ensure its not sticking/clogged.I do hope this helps
Thank you very much for you prompt reply.