Hello,
On my sister's 99 Elantra (112k miles) she's having a problem starting the car after the car is warmed up. In the morning she starts it with no problem. After the car has been driven for a while and then is shut off if you try to start it again the engine cranks and eventually will start but begin to idle roughly. When you give it enough gas, the issue goes away. I'm wondering if it was a clogged fuel filter, but if it was wouldn't it do this problem each and every time? Could it be a failing fuel pump? Any help would be appreciated.
Thanks, Nick