You dont give specifics about the vehicle, but if it has the CVT transmission then that could be the problem. They are known to get hot and go into a safe-mode. It happens more on the larger vehicles than on the smaller cars. Look into getting the trans fluid changed (special nissan cvt fluid, NOT regular atf) and having an external trans cooler installed. Plenty of discussions online about this issue.
Not much info hear But 1 of the first things to check on any car not running right is the Air Filter. because your car has to breath to run right. if you hold the filter up to the sun you should be able to see the light through filter. it is almost impossible to clean most filters. if any questions just replace air filter! same with fuel filter. you did not say if your check engine light is on? if it is most any auto parts will put a scanner on your car for Free and print out the codes if you ask. 1976 or newer. good luck
SOURCE: speedometer surging. actual speed 40 mph,
Its a loose connection on the speedo cable. its a b*tch to get to. I had the same problem on my truck, it would fluctuate in 5th gear on the highway. i spent the money and had a professional do it.
Hello
The
Engine and Automatic Transmission (not applicable to manual
transmissions) in this vehicles drive train are fully
electronically controlled by a computer called the PCM and TCM (Power
Train Control Module, Transmission Control Module). When a problem
like this or other drive-ability related problems occurs the computer
stores a record of the problem (there are of course some exceptions
to this, like the fuel pump, engine coolant temperature sensor and
MAF sensor for instance) in the form of a fault code in its memory,
to read these fault codes you must have the systems memory scanned
with a special tool. Once the fault code(s) are read you then must
perform the appropriate diagnostic testing to find and resolve the
problem(s) DO NOT REPLACE ANY PARTS UNTIL A TRAINED
TECHNICAIN HAS DIAGNOSED THE PROBLEM TO AVOID SPENDING YOUR HARD
EARNED MONEY ON PARTS THAT MAY NOT CORRECT THE PROBLEM. Also always
check fuel pressure for correct spec for your make and engine type.
SOURCE: 2000 nissan quest won't shift to reverse
first have you checked the fluid level? are there any codes? does the transmission shift good in other gears?
SOURCE: trans won't shift only manually 6 cyl also won't go over 40 mph. 2002 hyundai santa fe
this sounds like a timing belt problem.
http://www.youtube.com/watch?v=nyB6syDyP0o
This is what could happen if not replaced.
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