ok I checked both wires going to each injector with a test light and the ignition on.... no power at the injectors.... when I removed the connection and checked the connection there was power at the connector but it is not going to the other side of the connector at the injectors themselves... I tested right on top of the throttle body on each of the 4 wires coming out of the injectors... I am going to check continuity between the top of the throttle body and to the end of the connector with it disconnected, tomorrow. what do you think so far??

Thought this might be helpful:

Reference:
TECHNICAL BULLETIN TS88-077

Models: 1987-1988 Van, 1986.5-1988 Truck, 1987-1988 Pathfinder
Date:
June 6, 1988

VG30i AND Z24i ENGINE DRIVEABILITY, ENGINE THROTTLE BODY INJECTORS

APPLIED MODELS: 1986.5-1988 Trucks 1987-1988 Pathfinder 1987-1988 Van

SERVICE INFORMATION

Some of the applied vehicles may exhibit the following symptoms:
A. A lack of power during acceleration.

B. Rough, erratic, or no idle conditions that may require throttle application to keep the engine running.

This condition may be caused by a mechanical malfunction of one or two throttle body injector(s). Since this particular malfunction is mechanical, and not electrical, the E.C.C.S. Self-Diagnostic system will not detect this incident.
NOTE:
These symptoms are similar, but different, than the symptoms of a faulty Throttle Valve Switch (TVS) as described in Technical Bulletin EF&EC87-012 TS87-135. TVS incidents:

A. Produce a severe "miss" or "buck" just as the throttle position is changed (tip-in or tip-off).
B. Have little or no effect on engine idle quality.

SERVICE PROCEDURE

Test drive the vehicle to determine the exact characteristics of the incident. If an injector incident is suspected, use the following service procedure.
1. Perform the Mode III Self-Diagnostics procedure shown in the appropriate model Service Manual.
a. If no Trouble Codes (Code 44 or, for 1988 models, Code 55) are found, proceed to Step 2 on the following page.
b. If a Trouble Code is found, correct the condition as described in the appropriate model Service Manual. If the original incident still exists, return to the beginning of Step 1.
2. Test the injectors for proper operation by performing an "Injector Balance Test" as follows. NOTE:The throttle body harness connector numbers for the applied vehicles are listed below:

MODEL CONNECTOR #
Truck/Pathfinder (Z24i) 64M
Truck/Pathfinder (VG30i) 70M
Van (Z24i) 19F


a. Check the operation of injector "A" by disconnecting the red wire from the throttle body harness connector (at the location shown below) to disable injector "B".
b. Start the engine and allow to idle. With injector "B" disabled, the engine should run at idle on injector "A" in the FAIL-SAFE MODE. If idle is satisfactory, injector "A" is good. Turn off the engine, reconnect the red wire disconnected in Step 2a and proceed to Step 2c. If the engine will not idle, or idles poorly, injector "A" is faulty and should be replaced.

c. Check the operation of injector "B" by disconnecting the green wire from the throttle body harness connector (at the location shown above) to disable injector "A".

d. Start the engine and allow to idle. With injector "A" disabled, the engine should run at idle on injector "B" in the FAIL-SAFE MODE. If idle is satisfactory, injector "B" is good. Turn off the engine, reconnect the green wire disconnected in Step 2c and proceed to Step
3. If the engine will not idle, or idles poorly, injector "B" is faulty and should be replaced.

3. If injectors "A" and "B" are both determined to be operating satisfactorily, and the incident still exists, contact the FIXS Hotline for additional assistance.

PARTS INFORMATION


APPLIED MODEL INJECTOR PART NUMBER

1986.5 TRUCK(Z24i) 16021-03G15

1987 TRUCK/ 16021-41G00

PATHFINDER (Z24i)

1986.5-1987 TRUCK 16021-12G00

1987 PATHFINDER (VG30i)

1988 TRUCK PATHFINDER 16021-41G00
(Z24i & VG30I) 16021-41G00

1987-1988 VAN 16021-17C00

As far as your testing....you should only have power at one side of each injector's harness connector when it is disconnected as the other wire will be the ground circuit to the ECM. Do not apply voltage to the ground side circuit, even if by using the test light. Ground circuit should be tested by unplugging the ECM and checking between the ECM harness connector and fuel injector harness connector for continuity with minimal resistance and no continuity to chassis ground. You'll need to identify the correct pin in the ECM harness connector with a wiring diagram.

hmmm I need a wiring diagram.... got one coming in the mail but it won't be here till next week..

In the technical bulletin under service information, both A and B do not apply to me because I cannot get the motor to run on its own..... so I don't have a lack of power during acceleration and no rough, eractic or no idle conditions that apply the throttle to keep it running apply... agreed?

I will follow your post tomorrow about testing ground and power to the wires...

Oh and thanx a bunch I couldn't have gotten even this far without your help....

I'm at the same point as you are with out a fix yet. I did see a Youtube video that was for service techs with the same symptoms. In the video he goes through several different makes of cars but never covers Nissan wiring diagrams but he points out some of the safety devices that can cause the fuel pump from not working. He said that one of the safety if the car get in a crash and the car stops running the tachometer signal stops then that kills the pick feed to the fuel pump relay. I noticed when I was cranking over my motor that my tach wasn't moving. I also pored gas in the throttle body and the car would run for some time and my tach still had no movement. I'm going to look down that path today to see if I can figure out why my tach isn't working. I am also going to jumper the 12v at the relay socket to provide power to the fuel pump. I also replace the fuel pump with out any luck. ($200.00) gone and still no fix.
Here's a link of a wiring diagram, you can zoom in and print to larger view. http://www.autozone.com/autozone/repair ... 528004f5f1
Let me know if you find the fix and I'll do the same.
Good luck..

Here's the YouTube video that does a good job showing you how the electoral systems work. It's 45 minutes long but will give you a better understanding how the entire system works.
http://www.youtube.com/watch?v=Rqtfrx-HeD0

How to test your fuel pump relay
http://www.youtube.com/watch?v=bPrE1ijfAeA

This is worth viewing.