2002 Hyundai Sonata 4 cylinder
 

Sometimes My 2002 Hyundai sonata won't start. It start easily in morning but I when I take it to work, lunch time I try to start the car, it won't start first couple of attempt, then start and die. I have to push accecelator to not car die, after few seconds it become ok. Its fine when its running. I took to a mechanic he changed starter, but nothing changed, then I changed spark plugs, fuel pump but still having the issue. Have new battery as well. Can someone please help me to find out the issue. I will be thankful for this kindness.

First, don't go back to the mechanic who changed the starter.
The starter only cranks the engine.
Since the engine was cranking then it should not have been replaced
(Unless there was a circuit transient coming from the starter motor.. extremely rare)

You can try using brake cleaner to clean the IAC
It could be the Crankshaft Position Sensor
Hyundai's are known to have issues with the CPS.

But that is all guessing

Good luck

Thank you so much, I will give a try to IAC first, hopefully it will work. Thank you

This was interesting .. hope you enjoy it
No start due to EGR


Still CPS sometimes have issues when hot?

Thank you for sharing it.
do you know where AC is located? If you can guide me location or share an image please. Thank you

You are looking for the AC or the IAC??
The IAC is an Idle Air Control valve
And its location should be on or near the throttle plate