RPM's needle bounces and car overheats on long trips using air conditioner

Tiny
INDIANAJONES
  • MEMBER
  • 2003 NISSAN MURANO
  • 120,000 MILES
Started out on a trip from Vegas to Kansas City, in late July 2016, two hours away from Vegas rpm's needle fluctuating back and forth between the two and three. Car kind of chugs a tiny bit but you can feel it. Stopped at automotive shop he put it in diagnose says " cannot find a thing " it did this fluctuating all the way to Kansas City. Went to another automotive shop. Told me the same thing. Headed back to Vegas after several weeks. Made it to Colorado stayed a week. Left in mid August headed back to Vegas, after about seven hours or so (air conditioners on high) rpm's starts fluctuating all the way to five and six or seven, and now temperature gauge is in H. Turned off AC drove rest of way to Vegas (106 degree temperature outside, ) but made it home. It stopped doing the bouncing rpm on high numbers, and temp went back to center. I lost confidence in automotive shops so I drive it around still in town six weeks later no problems. But took it to Nissan dealership, he says it is transmission. Not sure, like I said lost confidence. What are your thoughts?
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Sunday, October 9th, 2016 AT 12:12 AM

2 Replies

Tiny
HMAC300
  • EXPERT
Scan for codes and have coolant system checked for head gasket leak. also clean throttle plate on both sides and iIAC hole with choke cleaner. then check fuel pressure with a gauge auto part rent it here's helpful article.

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
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Sunday, October 9th, 2016 AT 2:40 PM
Tiny
MAXIMILIAM
  • ADMIN
Thanks! I appreciate it! When I get that done I will let you know the outcome.

Regards,

Indianajones
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Sunday, October 9th, 2016 AT 10:16 PM

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