flooding problem
#11
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im still not sure on the duty cycle, but i did check the injection pulse by putting a light in the inj. plug and crack the engine. the light looked like a strobe light with irregular pauses. so i then checked the CMP connector. now i was told 1 wire is ground, 1 is signal (no power), and 1 has 5 volts (with key on). i have 1 grd. and both wires have 5.2 volts. so i followed the wires back and found the sig. wire and the AC comp. power wire were rubbing together. i repaired both wires and still have the same problem. i followed the CMP sig wire back to the PCM and cut the wire to see if the pcm was sending out voltage, and it is, 5.2 volts. am i right on the signal wire should have 0 volts? and does this mean my pcm needs replaced? sorry so long
#12
#13
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so you believe i need a new ECM? do you know of anywhere that i can get one? i bought this truck with this problem, (i know you can laugh but i got a good deal) the guy i bought it from rebuilt the motor, you dont think it could be a damaged cam sensor ring? i order it and can pick it up in the morning, but i never paid for it yet.
#15
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Just to be clear the cam sensore has three wires
1 DB/GY CMP SIGNAL (from Sensor to ECM) is this the wire you cut and got 5 volts on the ecm side ? If yes ECM is shorted internally.
2 DB/DG SENSOR GROUND
3 YL/PK 5 VOLT SUPPLY (from ECM to Sensor)
You can get on at a junkyard or check with your local parts store too as they sell remaned units. Just make sure its the same Part Number.
1 DB/GY CMP SIGNAL (from Sensor to ECM) is this the wire you cut and got 5 volts on the ecm side ? If yes ECM is shorted internally.
2 DB/DG SENSOR GROUND
3 YL/PK 5 VOLT SUPPLY (from ECM to Sensor)
You can get on at a junkyard or check with your local parts store too as they sell remaned units. Just make sure its the same Part Number.
#19
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ok i finally got my new ecm today. and the truck is still doing the same thing? i went thur the whole engine harnes to check for anymore bad wires, and everything looked good. i did pull all 6 plugs out and hooked the coils to them, just to watch how they spark. and the driverside of the motor (all 3 plugs) seems to sparking at the same time. im lost