Kia sportage hesitating when I accelerate - 2005 Kia Sportage

check the accelerator position sensor or accelerator motor for connections or problems.

run fault codes and check for accelerator position sensor / motor problem

Check to see if there is any wobble in the crankshaft pulley, it should be spinning straight and true. If it begins to wobble, you may hear a ticking noise, a loss in gas mileage, and later the tick will become a knock. I had a similar issue with my 2001 Kia Sportage, and it turned out to be the crankshaft woodruff key.

This caused a miss-alignment which altered the correct timing, which in turn was causing the knocking, reduced MPG's, hesitation upon acceleration, and a slow return to idle RPM's. If this turns out to be your problem, the correct way to repair it is to replace the crankshaft, woodruff key, and possibly the pulley gear. Another option is a rebuilt, or crate engine, neither option is cheap. I chose a third option which some have claimed to have exceeded 60,000 miles using a carefully crafted, tightly fit, secondary woodruff key, and carefully bond the key in place, the gear to the shaft, all using JB Weld high temp two part epoxy, and let cure for 48 hrs. In my case so far so good. Gas mileage went from 12-MPG's to 19-MPGs, acceleration's back, and hoping for the best.

it happen from demage of accelerate sensor some time but not a big problem

Hi Missippirebe, I think you should replace the fuel filter and if the problem persists check fuel pump pressure. It should be at around 3.7 bar. Regards John

how many miles? could be as simple as plugs! is check engine light on?

Sounds like you need a new fuel filter... its probably the cheapest thing to try first off...

My brand new kia sportage 2L purchased in January 2010 gave me problems from the start. First gas tank was squeezed sometime before and vehicle kept running out of gas even though gas gauge showing gas inside. Dealer replaced gas tank. More persistent problem is the vehicle hesitates to accelerate especially if not driven for about three hours or so and when on an incline. Went back to dealer on several occasions but no solution. any ideas?

Drive only on cool days

sounds like a catalytic converter