[brian0306]

hi i wonder if anyone can help my 2002 kia sedona has gone into limp mode but no engine management light car starts and runs fine apart from lack of power 3000 revs max

 

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hi mate check the coolant level {not the header tank the enginge itself metal cap l/h rear side of engine as you look at it}as there is a fuel limit put on if the engine gets too warm there is a metal pipe on the bulkhead called a heater valve with three glow plugs in it these have a tendancy to leak badly masked by the fact the escaping coolant drips onto the exhaust down pipe it is worth checking the front to rear coolant pipes aswell these corrode badly and leak especially the centre and rear pipes around the spare wheel carrier
also pull the fuel filter off without losing too much fuel give it a good shake up blocking the inlet and outlet ports obviously and pour contents into a clear container old coke bottle etc and look for any metal deposits check with a magnet any thing lager than a deposit the size of a 5p or bigger could spell trouble for the high pressure fuel pump the injectors also have a common fault with the copper sealing washer burning out at the nozzle of the injector causing hot gasses to pass the injector and can cuse a bit of a misfire and a chuffing noise

hope this helps stu

 

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just had another thought check the brake pedal switch it is a twin position switch one controls the brake light function and one isa fuel cut if this gets stuck you get stuck with a lack of power ! you can check both positions with a multimeter easily just make a note of its position before you remove the switch from the pedal box assy so you can refit it in the correct positon.