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Kia engine repair questions and answers

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  • july
    july - 2007 Kia Spectra - Engine - 1/30/2011
    Sloshing sound behind passenger dash when starting or stopping
  • Karen
    Karen - 2002 Kia Spectra - Engine - 1/30/2011
    I lose my speedometer
    I can be driving and lose the speedometer, and when it happens it seems to make the car hesitate. Then it will start working again.
    • Nissan Technical Advisor
      Speedometer problems arise when there is trouble anywhere in the above mentioned functioning process. The most common ones are problems in the speed signal sensor, as a result of which the speedometer stops working. If you notice problems in gear transmission or find the 'check engine' light on, it is because of a faulty speed signal sensor. In case of your speedometer using the 'eddy current' technology, there could be a trouble with the connecting cable which causes this problem. Ticking noises are a sign of this problem. In either case, you will need to replace the speedometer cable or the speed sensors to solve your speedometer not working problem.

  • pat
    pat - 2003 Kia Optima - Engine - 1/30/2011
    Why does my car stall after it warms up
    90000 miles got a code for cam sensor.replaced cam sensor and checked wires to sensor ok. replaced coils,wirers,plugs,temp.switch,and fuel pump and the car still dies after it warms up and i give it gas. i put it in the shop and they could'nt figure it out.
    • yboy82
      1/30/2011 yboy82
      Did you also try to check the condition of your EGR valve and its hose, PCV valve and its hose, MAF sensor and idle air control? Can you please post the extracted trouble code? Thanks.
  • samuel
    samuel - 2004 Kia Optima - Engine - 1/28/2011
    After how many miles it is imperative to change the timing belt?
    • James Vaughn
      1/28/2011 James Vaughn
      the timing belt is recommended to be changed every 60,000 miles. this is an interference engine which means that if the timing belt breaks or loses teeth it will most likely do severe damage to the engine. i.e. have a piston rise into an opening valve causing piston and/or valve damage. good luck
  • amandany
    amandany - 2001 Kia Sportage - Engine - 1/26/2011
    Why did my speedometer stop working and then a hour later the hold button light is coming on and off?
    150,000 while driving the speedometer quite and then a hour or so later the check engine light kicked on and at the same time the hold button that is on the shifter light started kicking off and on. We have already replaced the speed sensor that is in the ...
    0 answer
  • John
    John - 2005 Kia Magentis - Engine - 1/25/2011
    Engine starts, runs for 3 seconds then dies.
    Is this a fuel pump issue?
    • Nissan Technical Advisor
      It could be, that's is why it's better to check for the fuel pump pressure first, check also the fuel filter if clogged and the fuel pump relay if weak/defective.
    • yboy82
      1/25/2011 yboy82
      your fuel pump relay might be defective.
  • chris white
    chris white - 2000 Kia Sephia - Engine - 1/25/2011
    30lbs of pressure on number 4 cyl
  • Sylvia Davis
    Sylvia Davis - 2003 Kia Sorento - Engine - 1/25/2011
    Why does the gas squirt back when filling up with gas?
  • Bob
    Bob - 2000 Kia Sephia - Engine - 1/25/2011
    What is a immobilizer and what does it do?
    I'm getting a code 1624 immobilizer system fault. The check engine light comes on intermittenly.
      Well, there are a number of types of immobilizers for automotive use. Many new cars come with them installed from the factory, and in those cases the actual electronic control unit for the engine comes from the factory with an immobilizing circuit that will prevent the fuel pump and usually the ignition circuit as well from operating unless a transponder device is within the range of the sensor. These are the best type of immobilizer in terms of safety, because they are not a separate electrical circuit which can be easily tampered with like aftermarket systems.

      Immobilizers have a radio frequency transmitter that goes on your keychain. The sensor that is in the dashboard or somewhere near the ignition detects the unique frequency of the transmitter in order to allow the car to run.

      Aftermarket immobilizers come in all different styles. Generally speaking, it depends entirely on the specific cars specifications in terms of fuel delivery system and ignition system to determine how to immobilize the car.

      For example, a car with an electronically powered fuel pump (which is likely fuel injected) can be easily immobilized if the power relay to the fuel pumps operation is intervened from the immobilizer system. A fuel injected car with an immobilizer circuit would typically disable the fuel pump, fuel injection control, as well as the ignition circuit. A car that is carbureted on the other hand, likely uses a mechanical fuel pump from stock, and therefore you cannot prevent fuel flow directly without the use of solenoids in between fuel lines to stop flow physically. A carbureted car with a mechanical fuel pump would likely only have the ignition circuit disabled in the event of immobilization.

      A very simple immobilizer simply cuts power to the starter by replacing the starter relay with one that is controlled by the immobilizer control circuit if the key transmitter is not present. These systems are good, but nowhere near the theft prevention that a factory immobilizer provides. With enough time and thought, one could easily shop ahead of time for the specific relays a car they are looking to steal has, and replace the immobilizers aftermarket relays with the stock ones and cut the immobilizer circuit out of the equation.

  • Bob
    Bob - 2000 Kia Sephia - Engine - 1/25/2011
    What is a immobilizer and what does it do?
    I received a code P1624 immobilizer system fault. Also I get a P0733 code about trans temp senser has high reading and the engine is cold
      MIL Request Signal from TCM to ECM
      P0733 KIA - Third Gear Incorrect Ratio

      Possible causes
      - Low transmission fluid level
      - Dirty transmission fluid
      - Shift solenoids
      - Transmission mechanical problems
      - Transmission hydraulic control circuit
      P0733 KIA Description
      This diagnosis monitors actual gear position by checking the torque converter slip ratio calculated by Transmission Control Module (TCM) as follows:

      Torque converter slip ratio = A x C/B

      A: Output shaft revolution signal from revolution sensor
      B: Engine speed signal from Engine Control Module (ECM)
      C: Gear ratio determined as gear position which TCM supposes

      If the actual gear position is higher than the position (3rd) supposed by TCM, the slip ratio will be more than normal. In case the ratio exceeds the specified value, TCM judges this diagnosis malfunction.
      When is the code detected?
      P0733 is detected when A/T cannot be shifted to the 3rd gear position even if electrical circuit is good.
      Tech notes
      Start by inspecting the transmission fluid level and condition, and change fluid if necessary
  • Swegards
    Swegards - 2004 Kia Sorento - Engine - 1/24/2011
    Can you clean the throttle position sensor?
      A throttle position sensor refers to a sensor that monitors the throttle's position in an internal combustion engine. Throttle position sensors reside within the throttle body, which may require maintenance and cleaning to preserve normal function.

      # Symptoms of a throttle position sensor in need of maintenance include engine problems, such as stalling, rough idling or poor engine performance. Throttle position sensor issues can be determined via a self-diagnostic check.
      # Throttle position sensors can clog due to crankcase vapors. These vapors commonly pass through the throttle body when reintroduced into the combustion process and can deposit oily residue on the throttle plate facilitating the accumulation of sludge.
      # Cleaning the throttle body itself can be done using carburetor fluid and a clean cloth for the removal of light sludge. If heavy sludge buildup is an issue, the throttle body must be removed, cleaned in a solvent and allowed to dry. During this process, the throttle position sensor should not be cleaned due to the possibility of contamination or wire damage. The best way to preserve the sensor is to remove and replace it after cleaning is finished
  • Ivan
    Ivan - 2001 Kia Rio - Engine - 1/23/2011
    What are the valve clearance of Kia Rio 2001
    • yboy82
      1/23/2011 yboy82
      The clearance from stem-to-guide in the intake is (0.0007 – 0.0019 in.) and at the exhaust is (0.0019 – 0.0033 in.).
  • harold
    harold - 1995 Kia Sportage - Engine - 1/23/2011
    What is torque pressure and pattern for 2.0 engine. Are head bolts reusable for this engine
    My daughters car seemed to have a blown head gasket. when I started to tear it down realized headbolts were only finger tight. i have heard of stretch head bolts that can only be used once. I wonder if a previous mechanic reused them and they somehow worked loose.
  • sy2gbc
    sy2gbc - 1998 Kia Sportage - Engine - 1/22/2011
    Code 451 what should i do to fix
      This could be your Canister close Valve or FTPS (fuel tank pressure sensor)

      This is the general description of the fault code:

      The evaporative emission control system prevents hydrocarbon vapors from escaping from the fuel tank into the atmosphere where they could form photochemical smog. Gasoline vapors are collected in the charcoal canister. The Fuel Tank Pressure Sensor (FTPS) is an integral part of the evaporative monitoring system. The PCM monitors the FTPS signal to detect vacuum decay and excess vacuum. The FTPS measures the difference between the air pressure inside the fuel tank and outside air pressure to check the purge control solenoid valve operation and for leak detection in the evaporative emission control system by monitoring pressure and vacuum levels in the fuel tank during the purge control solenoid valve operating cycles.
      DTC Description

      The PCM monitors pressure in the fuel tank by means of Fuel Tank Pressure Sensor (FTPS) during purge control valve opening or closing phase. This monitoring will determine if pressure sensor signal is stuck. The PCM sets DTC P0451 if pressure variation is smaller than the predetermined threshold.
      If same error code is set in the next driving cycle, the PCM illuminates the MIL.

      You might end up replacing the Canister Valve or FTPS or both.