Went to start, Melting C101 pin H (ground)
03-29-2012, 12:13 PM
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Went to start, Melting C101 pin H (ground) Went to start my swap today and it cranks but won't fire. I tried starting it last night as well, but noticed I had forgotten to run battery cable to the starter and alternator. Did the starter (but not alternator yet) and the car cranks over but wont fire.
99 LS1 from Camaro
HP Tuners to delete VATS
Additionally, when I try to crank it, pin H on C101 starts smoking/melting. I have it grounded to the chassis on the same stud as a few other grounds.
What did I do?
99 LS1 from Camaro
HP Tuners to delete VATS
Additionally, when I try to crank it, pin H on C101 starts smoking/melting. I have it grounded to the chassis on the same stud as a few other grounds.
What did I do?
03-29-2012, 12:34 PM
#2
How do you have your battery connected to the motor? I assume a large black cable bolted straight to the block? A second wire from the negative terminal to the chassis? What other grounds do you have, i.e. motor to chassis and harness to chassis etc?
Sure sounds to me like you don't have proper grounds so your car is trying to do something like run the starter current through the ECM ground. Obviously not good.
Sure sounds to me like you don't have proper grounds so your car is trying to do something like run the starter current through the ECM ground. Obviously not good.
03-29-2012, 01:27 PM
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Yes, went back out and started testing stuff. Found the chassis had +12v! :-o
Hopefully nothing was damaged. I improved the grounding and got rid of that voltage in the chassis. Now it cranks but won't fire. I'm using a tiny battery and this diagnosis is probably taking its toll on the battery so I'm going to try again with jumper cables to another battery. Any other ideas on why it wouldn't fire? I definitely have fuel pressure, next I'll check spark if jumping with another battery doesn't work. I don't own noid lights so can't really check injectors.
Hopefully nothing was damaged. I improved the grounding and got rid of that voltage in the chassis. Now it cranks but won't fire. I'm using a tiny battery and this diagnosis is probably taking its toll on the battery so I'm going to try again with jumper cables to another battery. Any other ideas on why it wouldn't fire? I definitely have fuel pressure, next I'll check spark if jumping with another battery doesn't work. I don't own noid lights so can't really check injectors.
03-29-2012, 05:09 PM
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Still doesnt start, but definitely tries to.
Just bought noid lights, injectors are firing. Spark is also firing. What now?
Possibly not a large enough wire running to the coils/injectors?
Just bought noid lights, injectors are firing. Spark is also firing. What now?
Possibly not a large enough wire running to the coils/injectors?
03-29-2012, 05:56 PM
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confirm fuel pressure at rail?
How did you confirm spark?
My car wouldn't fire. Had everything as if it would/should fire. Plugs would spark outside of the cylinder but they were too fouled to fire under fuel and compression. New plugs and it started.
How did you confirm spark?
My car wouldn't fire. Had everything as if it would/should fire. Plugs would spark outside of the cylinder but they were too fouled to fire under fuel and compression. New plugs and it started.
03-29-2012, 09:13 PM
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There is definitely pressure, but I haven't hooked a gauge to it to know how much.
Confirmed spark with a plug out of cylinder. All plugs and wires on motor are brand new.
Confirmed spark with a plug out of cylinder. All plugs and wires on motor are brand new.
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04-19-2012, 07:58 PM
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Drive by cable setup. Plugs are definitely getting wet. See attached photo of plug... these were brand new before I started firing this swap.
Tried to take a log of cranking using HP Tuners VCM Scanner. I'm getting nothing at all for Cam Hi Lo or Cam Lo Hi. I went into scanner chart settings, changed two of the chart variables by selecting Cam Hi Lo / Lo Hi after clicking on PID. Am I doing something wrong? Anything you can tell from the attached log file?
Tried to take a log of cranking using HP Tuners VCM Scanner. I'm getting nothing at all for Cam Hi Lo or Cam Lo Hi. I went into scanner chart settings, changed two of the chart variables by selecting Cam Hi Lo / Lo Hi after clicking on PID. Am I doing something wrong? Anything you can tell from the attached log file?
Last edited by crashnscar; 04-19-2012 at 08:04 PM.
04-19-2012, 08:35 PM
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Not unplugged.
My understanding is that the engine will still fire without the cam sensor, just will be a little harder as the PCM will try firing and if that doesnt work then it will try 180* from where it tried unsuccessfully.
My understanding is that the engine will still fire without the cam sensor, just will be a little harder as the PCM will try firing and if that doesnt work then it will try 180* from where it tried unsuccessfully.
