0
I'm assuming this is a diesel.
These engines have mechanical injection pumps and will continue to run indefinitely without "ignition being turned on" -- unlike gasoline engines which go off when power to the spark system is cut off.
There is usually a grounding system connected to 'key on' which shuts off fuel to the injection pump when the key is turned fully off. I do not have wiring diagrams at hand, or immediate access to my 1999 NPR to check precisely how that is done on this truck, but I would check back to determine which component of the shutoff is dead or disabled.
If there was a pre-existing issue with the truck not STARTING, particularly if there is some kind of anti-theft system acting on the fuel shutoff, and someone fixed that by disconnecting the shutoff, you may have an easier time determining where the problem is.
You can always shut off the diesel engine by interrupting the flow of intake air -- I do NOT recommend you do this with your hand! -- and this should not cause any subsequent problems with restarting the engine again.
What else can I help you with?
What is the difference between Isuzu npr and isuzu npr-hd?
Isuzu NPR is bigger then Isuzu NKR, they are more expensive.
How do you install radiator Isuzu npr?
how do i install a radiator on a 1993 isuzu npr?
Wiring diagram for a Isuzu NPR?
A wiring diagram can be found at this website: http://www.abcccodes.com/95-isuzu-npr-wiring-diagram/ for the Isuzu NPR. The diagram can be downloaded as a PDF file.
What is Isuzu NPR?
Isuzu NPR is a truck. It takes diesel fuel and is a low cab forward truck.
Flasher relay location on 2005 Isuzu npr?
flasher relay location on 2002 isuzu npr?
Isuzu npr oil capacities 1988 model?
I have an Isuzu NPR 1992. The oil capasity is 12 quarts.
How do you get trans codes Isuzu npr?
http://www.troublecodes.net/isuzu/
What is the oil capacity of an Isuzu NPR 4.3 liter 1998 diesel?
98 Isuzu npr oil capacity
Where is the flasher location on a Isuzu NPR?
the location is on the left side of glove compartment, but you have to remove it to get threre
How do you time turbo on 2001 Isuzu npr need repair?
i have 2001 isuzu npr motor 4he1 i need wow the turbo no work
Which way do i turn lug nuts on Isuzu NPR?
To loosen lug nuts on an Isuzu NPR, turn them counterclockwise. To tighten them, turn them clockwise. It's always a good practice to use a cross pattern when tightening to ensure even pressure across the wheel. Make sure to check the owner's manual for any specific torque specifications.
Were is the heater relay located Isuzu NPR?
On top of the dash under the little door with the lock. Use a key or coin to open it
