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High RPM

Tiny
SHANA LEA GRIBBINS
  • MEMBER
  • 2004 NISSAN MAXIMA
  • V6
  • 2WD
  • AUTOMATIC
  • 162,000 MILES
I just bought this car and I am having problems with the rpm's running high. When I hit the brake the rpm's go up a few hundred and then will come back down and when this happens I can feel the jump in acceleration. Also, because the rpm's run high, when I go to shift into another gear without letting the rpm's come down, it will shift hard making it feel like my transmission is hitting hard. Anyone know what could b causing this?
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Wednesday, January 25th, 2017 AT 10:08 AM

1 Reply

Tiny
CARADIODOC
  • MECHANIC
  • 33,916 POSTS
The most common cause of high engine speed without a corresponding increase in power is a vacuum leak. Start with a visual inspection of the rubber vacuum hoses. There is a vacuum hose routing diagram on the emissions sticker under the hood that shows which hoses to check. If the leak is bad enough, you may be able to hear the hiss while the engine is running. Spraying water over the hoses while the engine is still cold can be an effective way to find some leaks. Watch where the water gets sucked in.
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Wednesday, January 25th, 2017 AT 12:12 PM

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