Question about 2003 Kia Sorento

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Problem Summary: Intermittent stalling, erratic idling, ‘sulphur’-like emissions For the last 2 years our Kia Rio Hatchback has had a mysterious intermittent stalling problem which has over time grown worse and is now almost always happening. We have taken it to mechanics and either the problem has not been present during their inspection, or even when present, they have not been able to find the source of the problem/a solution. To describe the engine performance when the car is 'playing up': Once the engine is started you can hear the revs are not uniform. The idle revs can increase and decrease (to the point of stalling) without using the accelerator. As we drive, the engine sounds fragile and will 'chug' at times. The car will often stall when we come to a stop and sometimes as we are slowing down - yes, dangerous in traffic! When driving at higher speeds and the clutch is engaged, the revs will plummet rapidly to near 0. The engine seems to perform a little worse when cold. We can often detect a strong sulphur like smell emitting from the car when it is performing poorly. The car has been driven well and regularly serviced since we purchased the car new 6 years ago (no longer in warranty). Recently the battery has been inspected/cleaned, tried a new air filter (sections had been charred?), cleaning of the throttle body, and computer check indicating no defect & resetting the idle. The mechanics last resort was to replace the IAC valve but with no effect. We have also tried commercial petrol tank cleaning fluids that you add in with fuel (unleaded) to no avail.

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Try changing the ckp sensor

Posted on Sep 24, 2008


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I have a Kia Rio 2005 Cinco( 5 door) Running really rough until I push down gas pedal,,, Then it seems lOk still a little r bogged down', It doesn't stall just runs rough without accelerration? Oxyg

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My personnel fix for this.

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