Question about 2003 Kia Sorento

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My Kia 2003 sorento model won't start fuel pump is working correctly and all electrical lines are working correctly the crankshaft censor was changed and enough spark is at the sparkplugs and still it doesn't start... I would Like to know how to reset the main CPU in the car

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To reset any car's ECU (not cpu) disconnect the negative battery cable from the battery for at least 15 minutes. Also if its not attempting to at least turn over, check your neutral saftey switch

Posted on Oct 04, 2010

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Posted on Jan 02, 2017

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Jan 20, 2016 | 2012 Kia Sorento Base 4dr SUV 2.4L 4-cyl....

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I have a 2003 Kia Sorento 3.5 and I just changed the fuel pump and it still won't start.


Check fuel pump fuse. Starter and alternator other than that I would need more details what it was doing before replacing fuel pump.

Dec 04, 2015 | 2003 Kia Sorento

2 Answers

Where is the fuel pump relay on a 2003 kia sorento?


The fuel pump relay for this 2003 Kia Sorento is located insdie the engine compartment fuse box, open the hood locate fuse box and the relay is there, the fuse box cover should have listing of the location of the relay.

Oct 06, 2012 | 2003 Kia Sorento

1 Answer

03 sorento will only start once a day usually morning


When it won't start you need to find out what's missing , Spark , fuel pressure , an then go from there . If no spark is it a coil , ignition module , crankshaft position sensor , the PCM/ECM - engine computer . If the fuel system is the problem is the B+ voltage to the fuel pump ? Is there a fuel pump relay that supplies B+ voltage to the fuel pump , is the PCM/ECM turning on the fuel pump . The simptoms you provide make's me think a sensor is going bad , shorting out when hot or vehicle is up to temp.
No Start Diagnostic Basics EricTheCarGuy

Apr 12, 2017 | 2003 Kia Sorento

1 Answer

My Kia Sorento will start and then it won't start, replaced the fuel pump, but did not replace the fuel filter can this be the problem


When the fuel pump was replaced it is important that you install a new fuel filter as it is necessary to have a clean filtered fuel into the pump. Also check the injectors and the spark plugs.
If the spark intensity is low check the HT COILS and the ignition system triggers to the HT coils.
If spark is good then the fuel pressure and calibration must solve the issue.
Take help for consensus.
Thank you for using fixya.

Aug 09, 2011 | 2003 Kia Sorento

3 Answers

Where is it located? The fuel filter. My 2003 KIA sorrento will not accelerate up hills. Either hwy or city. On level ground it is fine. Is the fuel filter possible my proble. AGain if so, where is it...


For Kia Sorento 2003-2005 the fuel filter is located inside the fuel tank and is replaced with the fuel pump as an assembly.

Fuel Pump - Removal & Installation
  1. Before servicing the vehicle, refer to the precautions at the beginning of this section.
  2. Remove or disconnect the following:
    Rear seat Access cover Fuel pump electrical connector
  3. Relieve the fuel system pressure.
    Fuel lines Fuel pump and filter assembly
To install:
  1. Install or connect the following:
    Fuel pump and filter assembly Fuel lines Fuel pump electrical connector Access cover Rear seat
  2. Start the engine and check for leaks.

Hope helped with this (remember rated this help) Good luck.

Nov 19, 2009 | 2003 Kia Sorento

1 Answer

I have a 2003 kia sorento ex. When the return line is removed....it starts fine.....but when it is placed back....it wont start. |Also......engine wont start when its hot......until its left off for about...


If you take the fuel return line off and it starts, it should spray some fuel out of the fitting the line slips onto. If not, you are either pulling the vaccum line or the pressure regulator is bad, or you could have a fuel pump going bad. One way to check the regulator is to apply vacuum to the port on the regulator and turn the key to "run" not start. With vacuum applied, fuel should run out of the return line fitting. If not, bad regulator or weak pump, maybey even a clogged fuel filter. If so, vacuum leak or blocked hose. Let me know if this helps :)

Jun 15, 2009 | 2003 Kia Sorento

3 Answers

Unable to locate the position of the fuel filter


Follow the (usually steel) fuel lines from the engine bay underneath the vehicle all the way back to the fuel tank. fuel lines may resemble brake lines, they usually look very much alike. Find your fuel rail, it connects to fuel injectors, and then follow it to find the fuel lines that go to the fuel tank.

You may have to remove plastic covers from underneath the vehicle, one kia I worked on the fuel filter was halfway up the side of the fuel tank and we had to remove the whole undercarriage cover from underneath the vehicle to follow the fuel lines to it.

I assume you have the new fuel filter, so you know what you are looking for, if you don't it looks like a can with a fuel line coming out of either side of it. Similar to what an engine oil filter looks like, usually quite a bit smaller though.

Hope this helps :)

May 10, 2009 | 2003 Kia Sorento

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