Yeah so my dads’ car died on him. With 75K on it was running really roughfor a day or two then died. I got the car running, the fuel filter was clogged, (never changed and almost no flow)I also changed the plugs, and the ignition coil was causing a rough idle so I replaced this (idles a lot better). I also took off and cleaned the TB, intake manifold, tested the injectors then cleaned them and put the car back together. Car started right up and ran 1000 times better, but on cold starts the car still runs rough for the first few moments. I checked the injectors and other areas for leaks where air could be getting into the system, no problems found. I though a leaky O ring but they are all good.

I think the fuel pump may have been damaged. Even after the car starts running better after a few minutes it wont rev up to high RPM's it cuts out as if it were air bound, or not getting enough fuel pressure. I googled and checked around, I was wondering what the normal fuel pressure is on this car? My guess would be 35-45PSI but I figured I'd ask, I plan on putting my gauge on it tomorrow, but I'd like to know what normal is first.

01 Hyundai Accent L 1.5

 

Your guess is real close it should be 42-45psi.

 

I had someone check the computer at their shop at idle the 1.5 should be at 49.8 PSI, since the 1.5 and 1.6 use the same pump I'm sure its abot the same.

It ended up needing a MAF sensor. It was breaking down, maybe a bad joint, and with heat and time it got better.