# Fast-idling Jetta

**URL:** <https://community.cartalk.com/t/fast-idling-jetta/39035>\
**Category:** Power/Fuel\
**Tags:** jetta, volkswagen, gasoline\
**Created:** [November 4, 2009, 10:42pm UTC](https://community.cartalk.com/t/fast-idling-jetta/39035 "2009-11-04T22:42:56Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![sparkymeb](https://avatars.discourse-cdn.com/v4/letter/s/9de0a6/32.png) [@sparkymeb](https://community.cartalk.com/u/sparkymeb)\
**Post date:** [November 4, 2009, 10:42pm UTC](https://community.cartalk.com/t/fast-idling-jetta/39035/1 "2009-11-04T22:42:56Z")

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I have a 20-year old 1.8l Digifant-injected, manual transmission Jetta that has started to idle at 3,000 RPM (once it has warmed up). I’ve looked through the manual and poked and prodded at various things. I think I’ve ruled out the PCV valve, the idle position screw, the idle stabilizer valve, and the temp sensors; I’ve swapped or disconnected them with no effect. If I do disconnect the blue temp sensor, the idle drops to 1,500 or so. It doesn’t hunt or surge, just sits steady, and has no effect on the driveability. I’m not a “mechanic”, but I have changed its oil, brake pads and rotors, radiator, clutch cable and various belts and hoses, so I can handle a wrench and screwdriver. The car doesn’t owe me a cent at this point, but I’d like to solve this without taking it to a garage, if I can. Thanks for any help!