2004 Kia Rio loses speed and won't accelerate going up hill - Kia Forum
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#1 (permalink) Old 07-10-2010, 11:57 AM
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Default 2004 Kia Rio loses speed and won't accelerate going up hill

So the check engine light came on when I was driving home from work earlier this week. I haven't gotten it to a mechanic yet b/c I haven't had the time to find one that won't treat me like I'm a girl that knows nothing-which unfortunately in this case I am.
The car stutters abit while idling, and if I rev it in park it feels like it wants to stall out when it reving down but doesn't quite. It takes a while to get up to hwy speeds-even for a 4 cylinder, and when I go up hills the speed drops considerably, and when I push the gas the RMP's go from2500 to 3500 in a jump not gradually. I have been driving it this week, I've put about 100 miles(it has 48500 total) on with this problem. I'm just not sure if it's a fuel problem or a transmission problem. Neither of which I'll have the money for till next month so I'm driving as little as possible and hoping I'm not killing my car.
Any help will be welcome.
Thank You
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#2 (permalink) Old 07-10-2010, 01:23 PM
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Welcome to the KIA forums. At the milage your car has the timing belt should be ok but, I ask about the timing belt just incase it may have slipped and altered the timing of the engine, they can slip and cause problems and in some cases ruin the engine. I would not drive the car if possible until you can get the timing of the car checked just incase you cause damage if the belt was to break. Now that I have scared you, it could also be something simpler like fuel filter clogged or weak fuel pump or auto problem as you suggested., but please get the timing belt checked out because if it slips badly or breaks the engine will be ruined.

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#3 (permalink) Old 07-20-2010, 11:28 AM
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My daughters '03 just got a new clutch at 96,000 miles cause it would not go up hill.
Her engine also sounded like yours and needed plugs and wires, now it's like new.
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