Cannot figure out how to test the crank shaft position sensor to see if it has caused recent ignition failure because the harness has three leads at the end that connects to the ignition modual and two leads that connects to the crankshaft position sensor, this is on a 2.8 V6 H.O. in a 1989 pontiac 6000 LE I do have power to the ignition module with ignition on, but no signal to the coils, and no spark, was atempting to test SPS when i ran into this oddity with the wires that run between the sensor and module

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For a complete wiring diagram Refer to the Wiring Information.

1. When Monitored: Engine cranking and Engine running
   
2. Set Condition: Powertrain Control Module detects an error when the camshaft position is out of phase with the crankshaft position. One Trip Fault. Three good trips to turn off the MIL.
   

Possible Causes

ERRATIC CAM POSITION SENSOR SIGNAL CAMSHAFT POSITION SENSOR TONE WHEEL/PULSE RING ERRATIC CRANKSHAFT POSITION SENSOR SIGNAL CRANKSHAFT POSITION SENSOR TONE WHEEL/PULSE RING CAMSHAFT POSITION SENSOR CRANKSHAFT POSITION SENSOR

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).

1.ACTIVE DTC
WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts or fan. Do not wear loose clothing. Failure to follow these instructions may result in possible serious or fatal injury. 1. With the scan tool clear the DTC(s). 2. Start the engine and run until operating temp is reached. (Closed Loop) 3. If the DTC does not reset it may be necessary to test drive the vehicle.

Does the P0016 return?

Yes

1. Go To 2

No

1. Refer to the INTERMITTENT CONDITION Diagnostic Procedure.
2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure)
   

2.CHECKING THE CMP SIGNAL WITH A LAB SCOPE

1. With a lab scope, backprobe the (K44) CMP Signal circuit at the CMP Sensor harness connector. WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts or fan. Do not wear loose clothing. Failure to follow these instructions may result in possible serious or fatal injury. 2. Start the engine. 3. Observe the lab scope screen.

Are there any irregular or missing signals?

Yes

1. Go To 3

No

1. Go To 6
   

3.CMP WIRE HARNESS INSPECTION
1. Turn the ignition off. 2. Visually inspect the related wire harness. Look for any chafed, pierced, pinched, or partially broken wires. 3. Visually inspect the related wire harness connectors. Look for broken, bent, pushed out, or corroded terminals. 4. Make sure the Crankshaft Position Sensor and the Camshaft Position Sensor are properly installed and the mounting bolt(s) are torqued to their proper specification. 5. Refer to any TSBs that may apply.

Were any of the above conditions present?

Yes

1. Repair as necessary.
2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure)

No

1. Go To 4
   

4.TONE WHEEL/PULSE RING INSPECTION
1. Remove the Camshaft Position Sensor. 2. Inspect the Tone Wheel/Pulse Ring for damage, foreign material, or excessive movement.

Were any problems found?

Yes

1. Repair or replace the Tone Wheel/Pulse Ring as necessary.
2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure)

No

1. Go To 5
   

5.CAMSHAFT POSITION SENSOR


If there are no possible causes remaining, view repair.

Repair

1. Replace the Camshaft Position Sensor.
2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure)
   

6.ERRATIC CMP SIGNAL
1. Turn the ignition off. 2. Remove the lab scope probe. WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts or fan. Do not wear loose clothing. Failure to follow these instructions may result in possible serious or fatal injury. 3. Ignition on, engine not running. 4. With scan tool, erase DTCs. 5. Start the engine. 6. Gently tap on and wiggle the Cam Position Sensor. 7. Ignition on, engine not running. 8. Inspect the Sensor connector and harness connector, and inspect the PCM connector and harness connector for loose, bent, corroded, or pushed out pins/terminals. 9. Inspect the related wire harness and the splices in the CMP circuit.

Does the P0016 return?

Yes

1. Repair the wiring/connector concerns as needed or replace the Camshaft Position Sensor.
2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure)

No

1. Go To 7
   

7.CHECKING THE CKP SIGNAL WITH A LAB SCOPE

1. Turn the ignition off. 2. With a lab scope, backprobe the (K24) CKP Signal circuit at the CKP harness connector. WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts or fan. Do not wear loose clothing. Failure to follow these instructions may result in possible serious or fatal injury. 3. Start the engine. 4. Observe the lab scope screen.

Are there any irregular or missing signals?

Yes

1. Go To 8

No

1. Go To 10
   

8.CKP WIRE HARNESS INSPECTION
1. Turn the ignition off. 2. Visually inspect the related wire harness. Look for any chafed, pierced, pinched, or partially broken wires. 3. Visually inspect the related wire harness connectors. Look for broken, bent, pushed out, or corroded terminals. 4. Make sure the Crankshaft Position Sensor and the Camshaft Position Sensor are properly installed and the mounting bolt(s) are torqued to their proper specification. 5. Refer to any TSBs that may apply.

Were any of the above conditions present?

Yes

1. Repair as necessary.
2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure)

No

1. Go To 9
   

9.TONE WHEEL/FLEX PLATE INSPECTION
1. Remove the Crankshaft Position Sensor. 2. Inspect the Tone Wheel/Flex Plate slots for damage, foreign material, or excessive movement.

Were any problems found?

Yes

1. Repair or replace the Tone Wheel/Flex Plate as necessary.
2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure)

No

1. Replace the Crankshaft Position Sensor.
2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure)
   

10.ERRATIC CKP SIGNAL


NOTE: The conditions that set this DTC are not present at this time. The following test may help in identifying the intermittent condition. WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts or fan. Do not wear loose clothing. Failure to follow these instructions may result in possible serious or fatal injury. 1. Start the engine. 2. Gently tap on and wiggle the Crank Position Sensor. 3. Turn the ignition off. 4. Inspect the Sensor connector and harness connector, and inspect the PCM connector and harness connector for loose, bent, corroded, or pushed out pins/terminals. 5. Inspect the related wire harness and the splices in the CKP circuits.

Were any problems found?

Yes

1. Repair the wiring/connector concerns as needed or replace the Crankshaft Position Sensor.
2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure)

No

1. Test Complete.
   

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No, to the second question- sensor won't make it crank any different. Faster than normal cranking often means a broken timing belt -less friction with the valve train not moving, so engine spins faster. But you have a timing chain, right? Any engine noise when it quit at 60mph? You could watch some valve action through the oil filler cap while the engine is being cranked, to make sure the timing chain is still intact.
If all is good, check for spark and gas to the engine. If stopped while running, it could be a failed fuel pump or a problem in the ignition system- cam or crank sensor, ignition coil, ignition control module, some of the things to check if no spark.

cranking is turning the engine over
from you misinterpretation of the term the problem is that it is cranking but not running
if that is correct then yes the cam shaft position sensor may very well be the cause of the not running at times as it controls the ignition and injector operation , the same as the crank shaft position sensor
could be a loose connection that has now come apart or the sensor has finally reached a point of failure that it needs to be replaced

Code p0320 refers to crank shaft position (CKP) sensor/engine speed RPM sensor-circuit malfunction===causes---wiring CKP/RPM sensor ---ECM. Get your hands on an aftermarket workshop manual for the car and you should be able to replace the items

Hello it is not easy to use a computer with a 4 year old constantly trying to get your attention.Anyhow i said disconnect your battery wait 5 minutes to reboot the computer i have gone through your situation a dozen times if it doesn't start it should trip your check engine light and you will be able to scan and retrieve keep me posted.John

the crank sensor is usually located near the crankshaft of the engine, not on the transmission with wires leading to it.

TESTING Fig. 1: Attach suitable jumper wires between the CKP sensor and CKP sensor harness. A DC volt meter can then be attached to the necessary terminals to test the sensor as the engine is being cranked
Typically, when a crankshaft position sensor DTC is set, checking the integrity of the wiring connecting the sensor (using a digital volt meter) to the PCM harness connector is the best way to determine if the sensor is faulty. If the wires all have continuity, and a DTC is set, it is probable that the sensor is faulty. Although a procedure is given here for testing of the crankshaft sensor itself, it is generic, and may not apply to every vehicle. Typically, the crankshaft position sensor harness connector wire leads are labeled. However, it is advisable to use this procedure in conjunction with the wiring diagrams in Section 6 to identify the terminals on the crankshaft sensor before connecting test leads.

1. Turn the ignition key OFF.
2. Unplug the sensor electrical harness and check the terminals for corrosion and damage.
3. Check the sensor wiring harness wires for continuity and repair as necessary.
4. Attach the sensor harness making sure it is firmly engaged.
5. Using a Digital Volt Ohm Meter (DVOM) set on the DC scale, backprobe the sensor signal terminal (terminal A) with the positive lead of the meter and backprobe the sensor ground terminal (terminal B) with the negative lead of the meter.
6. Have an assistant crank the engine and observe the meter.
7. You should have approximately a 5 volt reference signal pulse. If not the sensor may be defective.

mcdevito75 here, BEST BET, let the shop do this work, too many un forseen problems could come up. The stalling and unable to start for a while could also be a bad ignition module, no test for this part, but I would have it changed, for if it is a bad ignition module, all this other work will not fix the stalling and later start of your car.

well replace lots of coils but same with crank sensor on these trucks

• For this test, an analog (non-digital) voltmeter is needed. Do not remove the distributor connector from the distributor. To perform a complete test of the Camshaft Position Sensor and its circuitry, refer to the DRB II diagnostic tester. Also see the appropriate Diagnostic Charts. To test the sensor only, refer to the following: See: Testing and Inspection
• Using small paper clips, insert them into the backside of the distributor wire harness connector to make contact with the terminals. Be sure that the connector is not damaged when inserting the paper clips. Attach voltmeter leads to these paper clips.

PROCEDURE

1. Connect the positive (+) voltmeter lead into the sensor output wire. This is done at the distributor wire harness connector.
2. Connect the negative (-) voltmeter lead into the ground wire.
3. Set the voltmeter to the 15 Volt DC scale.
4. Remove distributor cap from distributor (two screws). Rotate (crank) the engine until the distributor rotor is pointed towards the rear of vehicle. The movable pulse ring should now be within the sensor pickup.
5. Turn ignition key to ON position. Voltmeter should read approximately 5.0 volts .
6. If voltage is not present, check the voltmeter leads for a good connection.
7. If voltage is still not present, check for voltage at the supply wire.
8. If voltage is not present at supply wire, check for voltage at pin-7 of Powertrain Control Module (PCM) 60-way connector. Leave the PCM connector connected for this test.
9. If voltage is still not present, perform vehicle test using the DRB II diagnostic scan tool.
10. If voltage is present at pin-7, but not at the supply wire:

1. Check continuity between the supply wire. This is checked between the distributor connector and pin-7 at the PCM. If continuity is not present, repair the harness as necessary.
2. Check for continuity between the Camshaft Position Sensor output wire and pin-44 at the PCM. If continuity is not present, repair the harness as necessary.
3. Check for continuity between the ground circuit wire at the distributor connector and ground. If continuity is not present, repair the harness as necessary.

1. While observing the voltmeter, crank the engine with ignition switch. The voltmeter needle should fluctuate between 0 and 5 volts while the engine is cranking. This verifies that the camshaft position sensor in the distributor is operating properly and a sync pulse signal is being generated. NOTE: If sync pulse signal is not present, replacement of the Camshaft Position Sensor is necessary.

Terms of Use

DTC P1391 is "Intermittent loss of Camshaft Position Sensor (CMP) or Crankshaft Position Sensor (CKP)". So the problem is with the CMP or CKP or the wiring in the circuit.
The Camshaft Position Sensor is located in the distributor on all engines.
For this test, an analog (non-digital) voltmeter is needed. Do not remove the distributor connector from the distributor. Using small paper clips, insert them into the backside of the distributor wire harness connector to make contact with the terminals. Be sure that the connector is not damaged when inserting the paper clips. Attach voltmeter leads to these paper clips.

1. Connect the positive (+) voltmeter lead into the sensor output wire. This is at done the distributor wire harness connector.
2. Connect the negative (-) voltmeter lead into the ground wire.
3. Set the voltmeter to the 15 Volt DC scale.
4. Remove distributor cap from distributor (two screws). Rotate (crank) the engine until the distributor rotor is approximately in the 11 o'clock position. The movable pulse ring should now be within the sensor pickup.
5. Turn ignition key to ON position. Voltmeter should read approximately 5.0 volts.
6. If voltage is not present, check the voltmeter leads for a good connection.
7. If voltage is still not present, check for voltage at the supply wire.
8. If 5 volts is not present at supply wire, check for voltage at PCM 32-way connector (cavity A-17). Leave the PCM connector connected for this test.
9. If voltage is still not present, perform vehicle test using the DRB scan tool.
10. If voltage is present at cavity A-17, but not at the supply wire:
    1. Check continuity between the supply wire. This is checked between the distributor connector and cavity A-17 at the PCM. If continuity is not present, repair the harness as necessary.
    2. Check for continuity between the camshaft position sensor output wire and cavity A-18 at the PCM. If continuity is not present, repair the harness as necessary.
    3. Check for continuity between the ground circuit wire at the distributor connector and ground. If continuity is not present, repair the harness as necessary.
    
    
11. While observing the voltmeter, crank the engine with ignition switch. The voltmeter needle should fluctuate between 0 and 5 volts while the engine is cranking. This verifies that the camshaft position sensor in the distributor is operating properly and a sync pulse signal is being generated. If sync pulse signal is not present, replacement of the camshaft position sensor is necessary.

Since you replaced the CKP, we can assume it is good for the time being. But I would inspect the flywheel for damage. A damaged flywheel will make a good CKP send a bad signal.