Intermittent acceleration problem

2007 HYUNDAI TIBURON
75,000 MILES • 2.7L • V6 • 2WD • MANUAL
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DANIYALKZA
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Hi. my throttle feels heavy like something pulling my car back from accelerating but it is an intermittent problem and when i restart engine disappear for a while but comes again. there is not even a pending code stored in my ECU. i have changed my upstream o2 sensors but nothing changed. checked everything before change o2 sensors.include:
MAF
TPS
Fuel filter
Sspark plugs
Spark plug wires
Coil pack
Catalytic converter
Engine coolant temperature sensor
Intake air temperature sensor
Fuel injectors
I have no problem with cold start or reach high speeds.idle is fine. it's make me crazy for about six months.
Jul 3, 2019 at 8:20 AM
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STRAILER
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Hello,

I would service the throttle bore start by disconnecting the battery. Here is a guide to help get the work done:

https://www.2carpros.com/articles/throttle-actuator-service

Please run down this guide and report back.
Jul 4, 2019 at 3:16 PM
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DANIYALKZA
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thank you. throttle bore is clean. i think it's electrical problem.
Jul 4, 2019 at 3:43 PM
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STRAILER
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Can you please shoot a quick video with your phone so we can see what's going on? that would be great. You can upload it here with your response.
Jul 5, 2019 at 10:49 AM
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DANIYALKZA
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Okay, i will do it soon.
Jul 5, 2019 at 12:14 PM
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STRAILER
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Also lets check the catalytic converter. here is a guide:

https://www.2carpros.com/articles/how-to-test-a-catalytic-converter

Please run down this guide and report back.
Jul 5, 2019 at 1:04 PM
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DANIYALKZA
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thank you. i have removed my catalytic converters two years ago.
Jul 6, 2019 at 1:44 AM
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STRAILER
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It sounds like you are setting the computer each time the malfunctions start, this can be a sign the PCM is bad and needs replacement. here are instructions and diagrams to help. Check out the diagrams (below). Please let us know what happens.

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Jul 7, 2019 at 1:16 PM