2004 Kia Optima LX I drove to the store put gas in came home went to work on Thursday morning. And when I went to crank it on Friday. Morning it would crank but not start.

SOURCE: gas cap release button is broken on 2004 kia optima

if you can some how manage to get it opened, spray some lubracant on the button inside the door. if not you'll need to replace the release cable.

SOURCE: Honda Accord 1994 V4 LX: Starting problems in the morning

There could be a few things causing this. When the car finally starts, is there any smoke coming out the exhaust pipe? White smoke would mean your headgasket is leaking and is letting coolant into the engine, then it is burned along with the fuel. Does the car run hot? Meaning has it ever overheated? Back to the smoke, if its black, your oil is getting in and is burning.

Now, the reason why it would be hard for a car to start, could be, a leaking headgasket, flooding the car while the car is sitting.

And yes, the car would be able to crank, but just wont start, for a while...because it has to get rid of all that fluid that has leaked into the engine while sitting at night.

Another thing you could look at, is your fuel pump, is it supplying a sufficient amount of pressure? If it isnt, it will take a while for it to pressurize and deliver fuel into the engine. You can check the fuel pump yourself by renting a fuel pump pressure tool from stores like autozone, kragen and more.

Your gas cap on tightly?

Good luck with your problem.

SOURCE: 2004 KIA Optima LX timing belt/water pump

The thing is your doing the timing belt the water pump is right their with it . it should cost you much more at all besides the cost of the water pump. When doing a timing belt I have a rule that I go by The timing belt/seals =cam , crank , any pulley & tensioner & water pump all get replaced at the same time. I did a t-belt on a Audi A-8 very complex whole front of car has to come off as well, he didnt want to do w-pump & thermostat his thermostat was their as well not even a month later the water pump gave out he had to pay double the price because he didnt want to do it when I had it apart the first time. And make sure mechanic is ase certified . good luck

Marvin

• 85242 Answers
• Posted on Jul 21, 2009

SOURCE: Whenever we put gas in our 2004 kia optima it does

replace you fuel system evaporative filter (charcoal canister), the gas fumes evaporated from the fuel tank are pooling in the filter causing very rich mixture and a hard start.

SOURCE: where can i see the wiring diagram for a 04 kia optima for free?

try replacing the starter