2001 Sonata - Fuel system problem?

balloufamily15

My car is constantly stuttering and jerking like it is gas starved. Idk what could possibly be wrong except maybe the fuel pump.

tonyg2016

http://www.hyundai-forums.com/y2-ef-1989-2005-sonata/90881-rough-idling-stalling.html

PF_Flyer

Have you eliminated any electrical/spark problems as a possibility? And if it is a fuel system problem, it doesn't necessarily mean it's the fuel pump. Could be a clogged fuel line, fuel filter. How long have you owned the car? Just thinking about knowledge of service history/how well it was or wasn't maintained.

Mr_Shiftright

We need to go back to basics to figure this one out. First, pull codes to see if any are stored, especially relating to misfire. Since most fuel problems don't throw codes (except injector circuits most likely), next step if nothing shows up would be to put a fuel pressure tester on the fuel rail to see if it is within specification. If it is below specs, then you have to figure out if it is a clogged fuel filter, faulty fuel pressure regulator, or defective fuel pump.

There are other possibilities, such as faulty injectors, which you can test by consulting a YouTube video, which will show you both a resistance test and a less-useful "sound test".