I have a VW Jetta, 2008, 5 cylinder. Recently when I get to 3000rpm, it slows down. When I shift up or down it will speed up, but what is causing it to slow down? I can floor it in fifth and once it hits 3000 I stand still. Thanks!
Check your exhaust / cat converter. if any of it is crushed or blocked the engine can't rev as there is no where for the spent gases to go. A cheap vacuum gauge on an active port will rise with a slow throttle increase to 3K rpm then when throttle is held steady it will slowly drop off.
okay sounds like a defective accelerator sensor~ http://www.partsgeek.com/gbproducts/WC/18277-01170345.html? utm_source=google&utm_medium=ff&utm_content=YN&utm_campaign=P artsGeek+Google+Base&utm_term=2005- 2008+Volkswagen+Jetta+Accelerator+Pedal+Module+Genuine+W0133- 1941162+05- 08+Volkswagen+Accelerator+Pedal+Module+06+07&fp=pp&gbm=a&gcli d=CLfc4uf437sCFdEWMgod-z4AFg
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