I just recently replaced my timing belt, crank sensor, and cam sensor. The car still won't start. No spark or no fuel. It just died at a stop sign. developed a rough idle the same morning. Code fault was crank sensor. Ecm gives past data, compression is 200 lbs in 3 cylinders, and 180 lbs in the last. But could be from no fuel.
Cleared code with scanner and even removed positive terminal from battery 15 minutes. Completely stomped. Car has 124k. New plugs, New air and fuel filter.
Did you use aftermarket crank sensor? if so that might be your problem. dealer has several different ones, by providing vin number, but there is only one after market for all optimas 01-05. try to connect thick pink wire and thick orange wire together on the ignition failure sensor. you might have the same problem as me. good luck.
Check the Blade (metal disc) behind the crank sensor. If it is damaged. Replace. I gave you the address for kiatechinfo.com in the earlier posting. This will help you with timing location marks etc.
My thoughts on this are that you have the car timed on the wrong stroke. a four stroke engine has an intake and an exhaust stroke that if it is timed on the exhaust the crank and cam sensors will not know when to fire the ignition or the injectors they will essentially be firing when the car is trying to excavate the mixture of fuel into the exhaust manifold. double check the timing of the car and go from there. If that is already done then I am assuming that the car has a crank sensor that needs to be gapped correctly into the ring as does the cam sensor. This is a common problem among many makes with these sensors that take the place of traditional timing and distributor.
If your crank shaft sensor and timing belt went on your car and it died as a result of this then you might have bigger problems than no spark and no fuel. If what you said about your compression test is true then you might have one or more bent valves. This type of engine is what is known as an "interference engine" the loss of timing will throw off the valves causing them to be open when the piston is on the upstroke striking the piston head. Damaged valves will cost a bundle to fix....more than the car is worth probably. I have a 2003 KIA and had the same thing happen, fortunately after i fixed the belt and sensor it started up without the damaged valves. It is very much a game of chance it may have damaged them and it may not have. But if your valves are open on the upstroke and are bent it will force your fuel/air mixture out of the combustion chamber and even if you do have spark at the right time there will be no mixture to detonate. With all the problems I have been suffering through with my KIA I would suggest sending it on to car heaven, these cars have nothing but problems.
Replace the ignition failure sensor .its cost u normaly $65 from auto zone .very easy to replace 3 mints job.
SOURCE: 2004 kia optima
Try the ignition switch,
For the Crank sensor there is a small metal disc that mounts behind the sensor if that is cracked or dammaged or installed backwards you will get same results as if it wasn't Make sure the timing marks line up on your timing belt. www.kiatechinfo.com
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I need some more information on this issue. Did you replace the timing belt before it broke or jumped teeth?
If you did check outhttp://www.kiatechinfo.com. Does the engine turn over?
Car will not start new timing belt new crank sensor
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