car starts jerking and acting erratic?

2003 HYUNDAI TIBURON
146,000 MILES • 2.7L • V6 • FWD • AUTOMATIC
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PHINFAN13
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when i drive more than 60 mph the car starts jerking and acting erratic but if i reset the ecu it is fine again.....does it need a reflash or a replacement
Feb 21, 2015 at 8:58 AM
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HMAC300
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It sounds like either can fix it, I have heard of reflashing fixing all kinds of problems, but if that doesn't work you will need to replace the PCM, but we should run a CAN scan, you can get a CAN scanner (Controller Area Network) which will work on most cars from Amazon here is a video to show you how.

https://youtu.be/u-4syLc-ifQ

and

https://www.2carpros.com/articles/can-scan-controller-area-network-easy

Here is the location for the PCM, you should call auto shops to see if they can run an update for you. Also, you can get a preprogrammed unit by searching Google or Ebay. Check out the images (below). Please let us know what happens.

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Feb 21, 2015 at 10:06 AM