1993 nissan D21 hardbody replaced fuel pump and filter for pump, fuel filter, distributor cap and wires, plugs... truck was running fine for about a week, started to hesitate really bad, shaking truck violently. it died, started back up in the morning. replaced main relay and fuel pump relay. started and was fine for about 5 or so miles. then the fuel pump gave out. seems like there isn't power being supplied to fuel pump. now i can't get the truck to start :( friend said it could be vapor lock, but it's an electrical fuel pump inside the tank. also suggested that it may be the map sensor or spark control module. i'm unsure where they are located though.

Question edited for typos.

These are the D21 wiring details. The best way is to get a conversion harness D21 to JVS from Crutchfield.

1994 Nissan Hardbody Pickup Stereo Wiring - The12Volt

https://www.the12volt.com > installbay > stereodetail
1994 Nissan Hardbody Pickup car stereo wire colors, functions, and locations.

Nissan Hardbody radio wiring colors

https://forums.nicoclub.com > ... > Nissan Trucks Forum
Mar 5, 2011 - have rear wires i ran my own but this was schematic for after market plug to harness so colors should be right unless back are missing and ..

did you replace the plugs leads one at a time
and not mix up the firing order

is this plug lead layout the same as your engine ?


if the car was running rough before

could be fuel related
or a burnt valve = uneven cylinder compression

images for 94 nissan pick up truck wiring

Nissan Hardbody Pickup Truck Factory Service Manuals

www.nicoclub.com/.../nissan-hardbody-pickup-truck-factory-service-ma...

Jan 1, 2000 - The Nissan D21 series pickup trucks, also known as the NissanHardbody, were ... Please select your year to access the Factory Service Manual: ...1991 - coming soon... 1992 - coming soon... 1993 - coming soon... 1994

check for air leaks around the injectors and inlet manifold

Could be this,test it if you can to make sure.

COULD BE A WEAK FUEL PUMP

You've already eliminated the spark plug & wireset, distributor cap & rotor.
Sounds like your car needs a tune-up, specifically, the PCV (positive crankcase ventilation) valve, and/of the EGR (Exhaust Gas Recirculation) valve.

Components checked/replaced during a tune-up are:
air filter
motor oil
motor oil filter
breather filter
fuel filter(s)
fuel strainer
PCV valve
EGR valve
spark plugs
spark plug wires
ECM or distributor cap & rotor
cabin air filter
transmission oil filter
transmission oil
engine coolant
check all vacuum hoses and lines

Troubleshooting the no-start condition - from the 1990 Mitsu Mighty Max Repair Manual:

Priority Action Part Type -- Cause
1 Inspect Battery -- Battery Discharged or Faulty.
2 Inspect Battery Cable -- Corroded, Broken, Shorted or Poorly Connected Battery Cable.
3 Inspect Distributor Cap -- Distributor Cap Cracked or Burned.
3 Inspect Fuel Filter -- Clogged or Dirty Fuel Filter.
5 Inspect Ignition Coil -- Faulty Ignition Coil.
6 Inspect Wireset -- Worn, Damaged or Faulty Spark Plug Wire(s).
7 Inspect Spark Plug -- Incorrectly Gapped or Fouled Spark Plug(s).
8 Inspect Starter -- Starter Motor Faulty.
9 Inspect Fuel Pump -- Low Fuel Pressure.
10 Inspect Solenoid Switch -- Faulty Starter Solenoid Switch.
11 Inspect Fuel Pump Relay -- Faulty Fuel Pump Relay.
12 Inspect Fuel Injector Pressure Regulator -- Faulty Fuel Injector Pressure Regulator.
13 Inspect Ignition Switch -- Improperly Connected or Faulty Ignition Switch.
14 Inspect Starter Drive -- Faulty Starter Drive.
15 Inspect Fuel Injector -- Dirty or Worn Fuel Injectors.
16 Inspect Fuel Pump Strainer -- Clogged or Dirty Fuel Pump Strainerat.
17 Inspect Engine Control Computer -- Incorrect Operating Information Being Delivered and Sent From The EEC.
18 Inspect Fuel Tank -- Fuel Tank Empty.
19 Inspect Carburetor -- Carburetor Flooded or Faulty Choke.
20 Inspect Distributor -- Worn, Loose, or Incorrectly Installed Distributor.

Clean the throttle body. Check the mass air flow sensor for corrosion of the wire harness connector.

fuel pump and fuel sock is bad replace them but first replace the fuel filter, it's located driverside on the inside of frame rail under door.

replace the distributor oil is leaking into the electronics of the distributor and shorting out pull cap back off and look and see if oil is leaking out