Kia Troubleshooting Questions? Ask a Mechanic
My name is ***** ***** I am a professional here at Just Answer. I noticed that your question had not received a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.My info is somewhat limited on your model here but I had seen no one else has responded and would like to see if I can help here.If at any time you feel that I cannot help with this please let me know.
With erratic fuel pressure from the high pressure pump this can be a fault with a restricted fuel filter (if this has not been checked or replaced already to try and correct this) or a fault with a restriction with the pick up filter in the tank or a kinked or damaged fuel line leading from the tank or filter.I have also seen components like the fuel pressure regulator cause this issue here needing replaced.
I would have all of these checked into here to see which is the cause and from there the affected component replaced or repaired to correct this issue.One of these here will be the cause most likely as these are usually the most common.The other issue (but usually you would see black smoke or a fuel smell from the exhaust) is a leaking fuel injector.I would have these tested if the above checks out o.k.
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Can you tell me what the pump pressure is reading or doing when you say it is erratic?
When it runs is there any black smoke from the exhaust or a fuel smell from the exhaust at all?
Ok unfortunately this is a difficult question for me to fully be able to diagnose from here myself.I will have to open your question up for others here to see if anyone else can assist further on this.I hope you can can get this resolved with ease.
That is great to hear the fault has been located.I will keep this in mind for future reference on this here.If you need anything else let me know and feel free to rate my help if you like.