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If your RPM’s go up without changing car speed then your clutch is slipping. Probably a good thing because 7K in 4th is 90ish, 5th is 120ish.
Now onto why the engine is running away, Lots of items need to be checked and quit driving it like that before it hurts you or someone else or just destroys the car. If you have a turbo then yes you have a tune. If you do not know who or how they tuned it find a local shop or buy a remote tune from Counter Space Garage. They may be able to see issues with it in the idle logs. If not you may have to log and get it to act up then they should be able to narrow down the issue.
Also check main power and ground connections. That is probably you start issue.
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