Metalcrack
New Member
('99 3.0 FFV) It seems like everything is in place for my truck to start, but doesn't. It cranks, and starts maybe every 3rd or 4th day during my diagnostics. The problems started after one night of bad weather (ran to store for wife's ice cream..... the essentials). Came home and no go a week later during another storm.
What I know:
-~55psi to the rail when trying to start (pump, relay, inertia good)
-12V signal to injector when trying to start. I don't know if I am getting the signal from the Pcm to pulse yet (plugs were wet when I pulled them). I can Verify I do get pulsing on cylinder 1. I have to get the right kind of probes to measure the others.
-Spark on all 6 plugs confirmed during the no-start periods (noid plug) Crank sensor should be good. Coil pack passes resistance checks on primary and secondary.
-Other folks lead me to check my CamPS, which was out of time. I reset, and replaced the sensor to be sure.
-No CELs/codes, light is there and reader connects/checks.....fuses ok for PCM power, PCM should be okay?
-I've tried to start with my remote start (Viper) and my key, so I doubt the ig switch is bad.......
-The theft light goes out 3 seconds after cranking so PATs shouldn't be an issue. Tried 2nd key to be sure.
-Compression test shows 143-151 for all 6 cylinders.
-Pulled the PCM connection and was pristine, and opened up the PCM and it too was spotless
What I cannot confirm:
-Pulses on cylinders 2-6 (even though they were wet during compression check)
-PCM is good as I don't have a spare
Any clues? I have spark, compression, (most likely) fuel and air.
What I know:
-~55psi to the rail when trying to start (pump, relay, inertia good)
-12V signal to injector when trying to start. I don't know if I am getting the signal from the Pcm to pulse yet (plugs were wet when I pulled them). I can Verify I do get pulsing on cylinder 1. I have to get the right kind of probes to measure the others.
-Spark on all 6 plugs confirmed during the no-start periods (noid plug) Crank sensor should be good. Coil pack passes resistance checks on primary and secondary.
-Other folks lead me to check my CamPS, which was out of time. I reset, and replaced the sensor to be sure.
-No CELs/codes, light is there and reader connects/checks.....fuses ok for PCM power, PCM should be okay?
-I've tried to start with my remote start (Viper) and my key, so I doubt the ig switch is bad.......
-The theft light goes out 3 seconds after cranking so PATs shouldn't be an issue. Tried 2nd key to be sure.
-Compression test shows 143-151 for all 6 cylinders.
-Pulled the PCM connection and was pristine, and opened up the PCM and it too was spotless
What I cannot confirm:
-Pulses on cylinders 2-6 (even though they were wet during compression check)
-PCM is good as I don't have a spare
Any clues? I have spark, compression, (most likely) fuel and air.