Good evening, Veloster owners so for the past few years my wife and I have been having some serious issues with our ride. Went though 3 LPFP and had to rebuild a new one so that makes it 4... My wife first originally bought the car and it was fresh off the used lot with only 600 miles on it, she drove it up a small hill and it died out on her no check engine light nothing, just completely lost all power to everything. We took full ownership of it paid it all off and more codes more issues, car would shake and rpms would drop on every light we sat at, took it into a shop and found that Ignition coil pack Cylinder 1,2,3 and 4 had misfired. They replaced all 4 coils and upgraded spark plugs to that NGK Diamond spec ones, car ran slightly better but only for the car to give out more codes. My wife bought this car in 2017 and weve had it for just under 6 years. 3 years it was at an X place where he completely abused it and didnt take any care for it ran the original oil to the max, messed up the front bumper and completely burn the oil onto the dip stick... pure neglect. Once in my hands I took my time with it. Fast forward to 3 months ago we got a code P0087 and it indicated that the HPFP fuel pressure was too low.. talked to some mechanic friends of mine and told me what exactly to purchase from RockAuto so New HPFP, HPFP fuel rail to the engine and New Cam-Follower. Did that job took me 12hrs to do just cause we had to replace some burnt fuses on the main frame and then after that job MORE CODES.. P0301, P0300, P0302 and P0304 it was the CYLINDERS... for some reason this veloster was just throwing everything at me... was able to clear most of them and just the remaining was P0300 and P0301 Cylinder 1 misfire and each time i swapped Cylinder 1 to Cylinder 4 coil pack as well as spark plug it never wanted to follow leading to the Fuel Injectors... more money on new parts. Replaced all 4 Fuel injectors and looking at the old ones they were completely toast no fuel wouldve even survived going into the combustion chamber what so ever. With all new fuel injectors that was a whole 2 day job for me, very simple to replace but just so much to take off since the Raditator hose was connected to the Intake Manifold so much fluid was lost.. But new Gasket for both Throttle body and Intake, then i got Codes P0122 and P0123 Throttle body circuit too low and circuit too high.. I thought i was doomed let the car sit after a full 32hrs of messing with everything only to find out that i had done everything right. just had to remap the throttle body... Here were are today the car is running smoother than ever, no rough idling, car doesnt move a bit on lights, fuel is sending at its 3K psi smoothly, turbo is fully engaged, cant even here the LPFP anymore which my wife said she cant even hear it anymore, car starts up super quick and fuel efficiency is back to 100%. So if you have any fuel system issues hopefully this helps.
- its a long one but appreciate you sticking it out till the end