No check engine light, but car is really sluggish.

Asked by GuruX67Y8 Nov 17, 2018 at 09:27 PM about the 2014 Kia Optima SXL Turbo

Question type: Maintenance & Repair

What could be wrong if the check engine light
never comes on. I'm lost!

5 Answers
43,910

Hornet_2497 answered 6 years ago

Scan for codes anyway. Fuel problems don't always set a code immediately so check fuel filter or pressure. Turbo boost provides your power; try to check that out too.

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43,910

Hornet_2497 answered 6 years ago

The turbo has a diverter valve and a waste gate solenoid that can malfunction, allowing you turbo boost to be wasted...not going to the engine intake...no power.

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F_O_R answered 6 years ago

If you have a boost gauge what does it show under maximum acceleration?

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GuruX67Y8 answered 6 years ago

Checked the pressure today, was told the fuel pump was ok. Had my oil change and filters replaced, as well as the spark plugs. Still sluggish. But I'm going to get the codes checked tomorrow.

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