Mechanics

KIA RIO ENGINE PROBLEM

2006 Kia Rio • 60,000 miles

How do I check the coils? I believe there is a resistance to check for, or do I just check continuity?
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Warlockind
December 30, 2012.



I found a Kia site that said 0.7 (+/-15%) Ohm. Mine all read 1.0 to 1.1 Ohm. That's a little high? Or WAY too high?

Tiny
Warlockind
Dec 30, 2012.
The reading is out of specs and that means they are not in good condition.

KHLow2008
Dec 30, 2012.
I don't think it is a spark problem. I think it is fuel. Just humor me. I need to depressurize the fuel system. I can do that by unplugging the pump relay and turning the engine a couple times? Or do I really need to take out the back seat and?
Under some other advice I cleaned the throttle body a bit. It seems to run a little better. The CEL comes on and blinks after a few seconds. My codes are still primarily 300 and 302 now, but a '302 pd' reading. It runs ok, not great, at higher RPM. Not as rough as idle. Before I mess up my seat I'd like to check the injectors.I've come this far.
Any procedure or 'Rule-of-thumb' stuff I should know?

Tiny
Warlockind
Jan 2, 2013.
For fuel pressure release, unplugging the relay and cranking till engine does not start is the recommended procedure.

You get what you ask. If you need us to help you solve problems, you need to make us understand the situation.

P0300 is random misfiring and P0302 is cylinder #2. Try swapping the coils around to test if the problem migrates. Are the spark plugs good?

KHLow2008
Jan 3, 2013.
I have a 2006 Kia Rio. Recently the CEL did not go off. It ran fine. My Actron said all monitors ready and a P0304 code. I removed the battery cable to clear the computer. The battery was leaking so I replaced it. The car ran fine and about two days later the CEL came on again. It still ran fine. The Actron said P0302 this time, all monitors ready. I drove it for a day and it started running rough at low RPM and the CEL began blinking. Actron now said P0300, 301, 302. I replaced the plugs and checked the coils. Yes, the coils are a little out of tolerance but they are all reading the same. It wouldn't be the first time I put a vehicle back together with non-perfect parts. I have replaced the air filter, cleaned the throttle body and PCV. I have replaced the hoses from the valve cover to the throttle body and to the air intake. It runs better. The CEL comes on after a few seconds and blinks. If this was my old GMC, I would stick a timing light on all the wires to indicate spark, then adjust the carb. I have checked the new plugs and they all seem to be firing. A bad fuel filter, dirty gas or maybe the pressure regulator, or pump might cause this or an injector. I haven't checked the injector resistance but a good injector may still spit bad or insufficient gas due to other components. I really don't think it's a big problem I'm just trying to pin-point it. I understand what the P Codes are saying but that's like trying to find a miss on a 350 chevy. It could be several things. I don't have the attachment to test the fuel pressure. While it's depressurized I'd like to take out the injectors and look at them. I'm tryting to run down the easy stuff before taking it back to those knuckleheads at the local Kia. Currently the Actron says Comp, Fuel, Misfire 'Ready' and P0300, P0302 and P0302pd codes. That's the story from the start.

Tiny
Warlockind
Jan 3, 2013.
You are having random and multiple misfiring and the coils are showing to be out of specs. Less than perfect components might mean nothing to a carburetted engine but computer controlled engines are a different story.

Since you know what you are doing, I have no further comments.

Good luck.

KHLow2008
Jan 3, 2013.