20 Most Recent 2004 Kia Optima - Page 2 Questions & Answers

replace the front break lines....they rot internally. had the same problem on my Taurus and Saturn Vue. both had over 100.000 miles

best way to find where oil is coming from is to wash/degrease the engine and then run engine and look for leaks. driving the car will only blow it all over and make detection very hard.

could be a faulty sensor or the cabling for the sensor lead is damaged, it could also not even be that sensor was the problem but the wiring for the sensor. also check the connections on the ecu, you need to have the battery off for this and unplug the connector to the ec, look for any water damage, any white marks on the connection pins and clean off, if there has been water getting into the connection then you will need to replace the seal, while the connection is off you can also use a meter and find the wiring code for the ecu on line and find the conditions for the sensor, connect the meter to the correct wire on the plug on the ecu and other lead on tho the corresponding wire on the plug to the sensor this will help you find out if the connection is good and there is no damaged wires.

most of the time the clip breaks or pops off the linkage --remove door panel and look at the linkages

Put a can of a product called "Seafoam" in the gas tank. Also do the following procedure.

Here are some of the causes of surges, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

if your talking about the part that every thing is assembled on to its called a spindle

How old is this car. Sometimes the only way to get rid of a bad problem is to get a newer vehicle.

https://www.google.com/#q=2004+Kia+Optima+check+engine+light+on+codes+P0050+and+P0446.

Ignition switch.

32 mm socket for axle nut, ratchet, needle nose pliers to remove axle nut cotter pin, 14 mm for brake calipers, not exactly sure what the tie rod bolt size is, but it would probably be in a metric socket set if its not a 14mm

Code came back as lean fuel ? what code P0 what ?

If you go to the link below you can access the 2003 service and repair manual, it is the same in all respects to 2004, it is free. Kia Workshop Manuals