Car wont stay Running.

Tiny
CHADM
  • MEMBER
  • 1999 NISSAN ALTIMA
My nissan runs great until you put it in a forward gear. When you hit the gas to go forward, the car drives to accelerate and then the rpms drops off but they go back up and then bounce the whole time like a rev-limitar. Does not do this in park, neutral or reverse. A local mechanic can not figure out why it is doing this.
Friday, December 23rd, 2011 AT 3:36 AM

3 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
You sure transmission is not slipping -if not check/test TPS and VSS sensors-also check fuel pressure
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Friday, December 23rd, 2011 AT 3:52 AM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
BTW do you have a CEL?
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Friday, December 23rd, 2011 AT 4:06 AM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Check for vacuum leakages, especially the air intake hose. Bad engine mounts would cause the engine to move backwards when shifting to forward gears and this can open up leakages in cracked air hoses causing the problem.
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Friday, December 23rd, 2011 AT 12:30 PM

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