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6.0 Tech
6.0 Fuel pressure question causing no start?
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[QUOTE="bismic, post: 1561997, member: 1537"] Proper cam sensor resistance is only part of the testing. TROUBLESHOOTING CMP: I would first check the sensor for a broken o-ring causing an oil leak into the electrical connector. Also, look for rust under the sensor flange (block rust) that could keep it furter away from the peg and prevent a strong reading. To check the sensor: You can check the red (pin 31) and orange (pin 43) wires at the PCM center connector (C1381c). Using a multimeter that reads hertz check across both wires while cranking, you should see around 1.3 Hz (between 1.1 and 1.9 Hz is acceptable). The operating range of the sensor is .5 to 50 Hz. Testing the sensor AND the wiring: Measure the resistance between the PCM engine connector C1381c (center plug) pin 31, harness side and the same PCM engine connector pin 43, harness side. Should be between 800 and 1000 ohms. Operating range is 800 - 11,000 ohms. To check the WIRING ONLY: You can measure the resistance between the PCM engine connector pin 31, harness side and the CMP sensor pin 1, harness side; and between the PCM engine connector pin 43, harness side and the CMP sensor pin 2, harness side. Resistance on each test should be less than 5 ohms. CMP connector is C1275. The CMP produces its own voltage output (AC) while the engine is cranking. Put a meter to pins 31 and 43 of the PCM plug C1381c: center PCM connector (disconnect plug from PCM - PCM is mounted outboard of drivers side battery and has 3 plug connectors). Have someone crank the engine over and check for AC voltage output of cam sensor. When checking A/C volts, the voltage will fluctuate and it should go over 0.1 volt as it fluctuates (slightly). [/QUOTE]
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6.0 Fuel pressure question causing no start?
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