Question about 2003 Kia Rio
Why does my 2003 kia rio sputter and misfire when i step on the gas and the check engine light is on?
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Posted on Jan 02, 2017
had similar problem, 2003 rio 1.6l idle fine and die when trying to accelerate or lurch and die ran fine in reverse change timing belt,wires plugs, had codes for multi cyl misfire and low injector voltage, still same lurch and die. try wiggle test on sensor plugs and main engine harness between battery and engine . i did this and found car smoothed out,tried wiggle again and car died,took harness apart where i wiggled it and found broken wire to crank sensor.good now
Posted on May 02, 2010
It is odd that there are no codes registered. Have the scanner connected while you simulate the condition and get the check engine light.
Since we do not have codes handy I would suspect, bad wiring. Have the fuel pressure tested. The problem may be from the lack of fuel being supplied even if the throttle is stepped on. Check the sparks from all of the plugs. When you check the sparks from the hi-tension wire, do it one at a time to check which causes the sputter.
Other than that it could be loose wiring or vacuum lines. If you have carb cleaner handy or throttle spray, try spraying the intake of the car. At times it may help.
Posted on Sep 07, 2011
I had the same problem with the engine misfire on my 2006 Kia Rio, I took it to 5 garages, I took it to Kia, they were all ****, and had no answer to the misfiring of my engine, yes the "engine light" came on all the time, and sometimes the engine light stayed on.
They all tried flushing the fuel injectors, well that didn't work, and they were confused why it didn't work and said that they couldn't fix it, some said it was a piston, and you might have to overhaul the engine, after that and lots of money spent I had the same problem and thought to myself,well that was one ******** theory, they were so bemused by the whole misfiring of this engine and said they couldn't fix it.
They ran lots of computer tests on my car with a misfiring code that showed up, but a code is just a code with no step by step instructions to fix the problem, no one couldn't fix the misfiring problem.
$1500 later I was about to give up until my sister said that she had found a descent mechanic, told him about my problem and told me to bring my car in.
Well to my amazement, he found the problem, the misfire was caused by the coil that had been shortening (an electrical shortening), and there was evidence of a burn mark on the coil, well he changed the whole coil and changed the spark plug leads and now the car doesn't misfire and works great - I hope this is a solution to your misfiring problem, I thought I would share my story about my Kia Rio misfiring problem - Have a great day everyone.
Posted on Oct 04, 2011
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