When I step on the gas my car is very sluggish to respond. It does not misfire or anythign like that. The engine reves up like normal but I get sluggish acceleration. I have had this happen before and when I get an oil change it has gotten better. It has not helped this time. I dive a 2011 Kia Optima with turbo.

50

Asked by Nov 08, 2013 at 09:01 PM about the 2011 Kia Optima EX Turbo

Question type: Maintenance & Repair

When I step on the gas my car is very sluggish to respond. It does not misfire or anythign like that. The engine reves up like normal but I get sluggish acceleration. I have had this happen before and when I get an oil change it has gotten better. It has not helped this time. I dive a 2011 Kia Optima with turbo.

14 Answers

114,165

Have you bought gas at a different station? Could be bad gas

1 of 1 people found this helpful.

just guessing I'm going to say check the operation of the EGR...the vacuum operated device for a diaphragm that doesn't leak and a vacuum that is correct for the conditions (upon decel...and to bring down combustion temp)...so check the operation and clean the EGR valve with brake cleaner to insure correct operation of it~

1 of 1 people found this helpful.

...another possibility is a defective fuel pressure regulator...check THIS one for leakage at the diaphragm and vacuum hose that isn't split or cracked or swollen...replace all vacuum lines with silicone for maximum reliability~,,,,honestly have my doubts about Techron...cleans everything including the meat that the regulator diaphragm is made of~

1 of 1 people found this helpful.
100,315

Is the Turbo kicking in? Have you checked for a stuck wastegate? Air filter clean?

1 of 1 people found this helpful.
50

Would that be covered under the powertrain warenty. I am at 38000 miles.?

3 of 3 people found this helpful.
50

Yes I had all the filters changed today when I had the oil changed. It's like the turbo is not kicking in.

2 of 2 people found this helpful.
100,315

Yes it should be covered under the power-train warranty, but check the dealer first, some of the Kia's have a limited warranty and it might not cover a turbo.

2 of 2 people found this helpful.

the fuel pressure regulator should be looked at~ http://www.partsgeek.com/mmparts/fuel_pressure_regulator/kia/optima.html

1 of 1 people found this helpful.

I KNOW that this car is newish...but it's a Kia...different set of rules apply~

I took my car in today for what seems like the same thing your talking about. Turns out it's my wastegate on the turbo.

10

my 95 mustang gt 5.0 is having the same problem but only when i take off but if im going like 20mph then stomp on the gas it takes off fast just on take off its really slow replaced fuel presser regulator air filter cats fuel pump fuel filter plugs/wires the hole distributor assembly coil pack

10

takes off very slow from dead stop ^^**

10

it was the timing

1 of 1 people found this helpful.

My 2011 Kia Optima was doing the same thing and when I took it to the dealership they did an adjustment in the computer setting for my fuel injection. Anyway, it is no longer having the problem, although it did cost me a loss of about 2 - 4 mpg.

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