Question about 1986 Nissan King Cab

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86 v6 nissan pu wont rev over 28.000 rpm

Cant gt it out of failsafe mode

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The following are the general instructions on the start of diagnosing any electronically controlled engine or transmission problem.

The engine and the automatic transmission (transmission control is only for automatics, engine is still computer controlled no matter the transmission type) in this vehicle are computer controlled and in most cases when a fault occurs a fault code is stored in the memory of the computer control module. There are exception to this, such as the Mass Airflow Meter and fuel pressure problems. What must be done is to have all the basic testing done such as a scan of the system for fault codes as well as a check with a live data scanner tool for engine functions that are not within range of normal, a trained technician is required to know what is correct and what isn't, then based on careful diagnostics done from a factory repair manual the correct part is replaced or the wiring repaired or the computer replaced (known as the PCM), which is very rarely the problem. Other basic checks must be done as well such as mechanical problems with the engine as well as engine state of tune and mileage on the engine. The transmission can have mechanical issues as well such as no gear engagement at all or a failed pump or other pressure related problems. Also engine mechanical problems can and do cause many drive-ability related problem such as rough idle and other symptoms.

Posted on Oct 26, 2012

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Posted on Jan 02, 2017

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SOURCE: wont rev over 3500 rpm

You should go buy a Haynes or Chilton manual to figure this out. Costs about $15. There could possibly more than one reason for this happening. Anything posted in response could only be speculation.

Posted on Oct 28, 2008

  • 1129 Answers

SOURCE: engine will not rev above 3000 rpm

Inadequate fuel pressure, change the fuel filter first, make sure the car sits for at least two hours before replacing the fuel filter because these fuel lines are under high pressure during the time of operation. The pressure usually decreases over time in the lines but wear safety glasses just the same, I would recomend depressurizing the fuel system first, buy a Haynes repair manual for detailed procedure to be safe. If problem persists go to Auto Zone and ask them to check for trouble codes these codes if present may instuct you in detail to replace the MAF sensor or give you a code that must be looked up to find the problem.

Posted on Jul 22, 2009

  • 1 Answer

SOURCE: 1984 Nissan 300zx non turbo VG30E engine wont rev

My vg30 dnt rev more than. 2200

Posted on May 19, 2011

patrick_dier
  • 310 Answers

SOURCE: 1995 nissan bogs down at 3000 rpm no check engine light

if its a turbo,see if the tubes on turbo still connected

Posted on Jul 27, 2012

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Break and battery light stays on all the time


sold all over earth, what country> we cant guess this....
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86 nissan PU.
720 PU>? Datsun>?
or D21 Nissan ( 1986 Dat-SUNS became NISSANS. in USA)
Model years 1986.5 (second half) and later were called Nissan Hardbody Trucks, chassis code D21.

D21 are called HARD BODY trucks. mid year changes.
so???? which is yours.

as you might not ,know , the models are wired diffrent by different exact models and country.
long ago , i had the 86 with the VG30 V6...

so i will roll the dice and answer for
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things off stay on, 101
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all can cause this..... its old and is common on old cars.
but if wiring is not hacked, (id see that in 10seconds in person)
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gas engine car not diesel.
USA 86 body
brakes
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SO only a bad switch can cause this.... period
now the dash charge (battery ) light stuck on.


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wiring errors to the ignition output is side, key switched power is failing.




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You should go buy a Haynes or Chilton manual to figure this out. Costs about $15. There could possibly more than one reason for this happening. Anything posted in response could only be speculation.

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