Question about 2002 Kia Rio

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Check engine light on rough idling and power loss after complete tune up

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Ck muffler, sometimes the catalatic converter goes bad and needs to be replaced ($300.00) try a junk yard if yours is bad.

Posted on Sep 02, 2010

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Wow 9 months old post. im new and starting with check engines the other guys probley passes you over because you did not post the engine code for the check engine.
im sure by now you got it fixed. without the code and what the code says it is just quesing . my guess would be idle air valve or mass air flow.but thats quessing .in the future go to a major auto parst store that reads your code for free .get a print out from them or write it down they can also eather pull up or print out trouble shooting .example of what you need to post to get quick help. code p0103 mass air flow VAF sensor high input voltage .that just gave a pinpoint problem .good luck happiness is no check engine light

Posted on Aug 13, 2010

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I have 1995 chevy lumina with the3100 engine. It starts fine but idle is rough and has loss of power and smells like unburnt gas.


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The basics for a rough idle, check for a leak of some kind, fuel--egr--vacuum, something of that nature. Does it run ok off-idle?

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My 2007 Chevy Silverado loses power when I come to a complete stop no engine lights appear but if I turn off the truck the problem goes away for awhile .


Loss of power, but no mention of rough or inability to idle (including stalling). If those additional symptoms are part of the problem, check for a vacuum leak to the intake. Listen for hissing or sucking noises near air hoses. Look for loose, cracked, or broken air hose connections. Check PCV valve...Cheap to replace, could be sticking, then loosen after truck sitting with engine off. A vacuum leak will not give any light indications, and vehicle will seem to run normal when applying gas, but will want to stall or run rough (or want to stall) when at idle or sometimes when taking foot off gas when slowing down.

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My muffler fell off today and its louder but i have a rough idle now what is the muffler why is it doing this. its also loss of power


your muffler not only reduces sound but also tunes the flow of exhaust gas,so if it is missing, all the engine tune is put out completely,replace asap so that you run quiter and use less gas.(F1 racing cars have a length of pipe that is cut to an exact length to give max power...)

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I have a 1994 Jeep Cherokee, V6. It idles rough and It has power loss when I hit the gas. It eventually gets going but studers.


When was the last time this engine had a tune-up? Is the check engine light on? If so, reading the codes will get you looking in the right places. It sounds like it is missing badly.

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