2005 Kia Optima Engine problems

The car will run fine, then engine will start to misfire. Then lose power (put the gas petal to the floor and car does not move and the engine does not rev up due to the increased gas flow.) The engine will shutter and turn off. Le it sit for 5 to 10 minutes and the car will start. The car will drive for another 5-10 minutes and shut off and will not run for start for several minutes and will not drive beyond couple hundred feet. We have replaced the cam sensor, crank sensor, egr valve, spark wires, sparks,...

Tl*the contact owns a 2005 kia optima. While driving approximately 35 mph on normal road conditions, the vehicle stalled without warning. The check engine warning indicator illuminated intermittently on the instrument panel. The vehicle was taken to the authorized dealer, but they were unable to duplicate the failure. The vehicle was taken back to the dealer on three separate occasions for the same failure, but there was no resolution. Recently, the crankshaft sensor was replaced under the service warranty;...

I just bought my 05 optima. It also turns itself off--when it wants to. At first-it just did it in reverse. Then it started doing it driving down the highway. I took it to the dealer-who also, could not duplicate it. This is scary driving this car. You have no warning--it just turns everything off--like you never started the car at all. *Tr

From the day I have pulled my car off the lot one year ago I have had nothing but problems. The first problem I encountered was everytime I crank my car my belts let off this squealing noise. At every oil change I have asked them to double check the belts. Upon picking up the car the dealer assured me they have tighten the belts only to have them continue squealing. The other issue I have is the fuel tank. I have always felt I do not get a complete fill up when going to the gas station. I put the nozzle in the tank...

Dt*: the contact stated the vehicle intermittently stalled without warning. The vehicle restarted each time and was taken to the dealership. The dealership was unable to determine the problem.

Dt*: the contact stated without incident the check engine light illuminated. The dealership determined the fuel cap was not properly tightened, then checked for diagnostic codes. There were no codes found and the light was turned off. Fifteen minutes after the vehicle was taken from the lot, the light illuminated again. The vehicle was taken back to the dealership who expressed the fuel cap was not tight enough and there were still no codes. The light was turned off. The light illuminated a third time; although the vehicle was not refueled.