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Starting problem when hot.

I just got finished learning TDCO on mine (literally I just came in from doing it with my MT2500 tool I just swapped computers), I guess you were who had Bill tied up when I just tried to call.

1st thing you need to know time set & TDCO are 2 different things.

Time set gets you to what I call "base timing" where with scan tool you activate/command time set at that point desired time will go to 0 degrees, and actual should go to 3.5 deg avg. loosen/rotate IP to achieve that, tighten down just the top lock nut.

Once you get 3.5 avg (I like mine to fluctuate from 3.5/3.7 deg) check coolant temp PCM is seeing, 170F minimum, I prefer 175+ so your engine does not try to cool down while in mid learn, check for codes active (ses codes) and any stored in history, those have to be cleared.

I'm not sure how scan basic enables TDCO learn you might need to check with John aka NVMTNLION if you haven't figured out how to enable TDCO learn, on my OBD-II it's a matter of KO/KO APP to floor to activate the learn procedure.
 
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TDCO has its own window in GMTDscantech.

There is an on/off button for both timeset and TDCO. Also, a window of values is shown.
 
IP wrench

Here's the wrench. It's bent at a 45* and works well and is cheap. Leo
 

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OK. I got home whipped up a few tools(pics to come) and took a whack at this. From the way I tried to understand what Bill was saying about Time set I understood it as that function would reprogram base time in the prom so I didn't mess with it. I loosened the pump, turned it about 1/16 towards drivers side, locked down the 2 easy bolts then at 180 degrees + no codes I did TDCO relearn. It came up with -2.02 and set an out of range code. I moved the pump back very slightly, cleared the codes did another relearn. Now this is the part I'm not sure about but during the relearn it was fluctutaing between -1.67 and -1.94. When it hit -1.94 I turned the relearn off(set it ?? by doing that ?).
How'd i do ?
Here is the latest screenshot:
Engine run time: 00:10:00
Boost pressure (MAP): 16.37 PSI
Desired EGR: 8.19 PSI
Desired idle: 562 RPM
EGR pressure: 7.76 PSI
EGR duty cycle: 65.2 %
Engine coolant temp: 186.4 F°
Engine speed: 1500 RPM
Glow plug relay feedback: 0 Volts
Glow plug voltage: 0.2 Volts
Ignition voltage: 13 Volts
Wastegate duty cycle: 77.7 %

__________________________________________________________________
INFORMATION SENSORS
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
PCM Calibration ID: 4805
Current DTCs: 0
Accel. ped. pos. 1: 0.96 Volts
Accel. ped. pos. 2: 4.12 Volts
Accel. ped. pos. 3: 3.86 Volts
Barometric pressure (BARO): 13.5 PSI
Battery voltage: 13 Volts
Fuel temperature: 105.5 F°
Intake air temp: 100.5 F°
Throttle position: 12 %
Turbo boost (Calculated): 2.87 PSI
Voltage reference sensor: 1.3 Volts

__________________________________________________________________
INJECTION PUMP SENSORS
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
Actual injection pump timing: 36.43 Deg °
Cam reference missed: 0 Counts
Crank reference missed: 0 Counts
Fuel calibration: 150 Counts
Fuel rate: 24.38 mm³
Fuel rate - Cruise: 0 mm³
Fuel rate - Idle: 0 mm³
Fuel rate - Maximum transient: 70.94 mm³
Fuel rate - Throttle requested: 27.75 mm³
Injection pulse width: 2.08 ms
Injection timing - Measured: 13.8 Deg °
Injection timing - Desired: 13.5 Deg °
TDC offset: -1.94 Deg °

__________________________________________________________________
TRANSMISSION SENSORS
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
3-2 PWM solenoid duty cycle: 0 %
Cruise target speed: 0 MPH
Cruise speed error: 0 MPH
Current gear of transmission: 2 Gear
Current torque signal pressure: 16 PSI
Current transmission ratio: 1:0.09 Ratio
Error between desired and actual shift times for latest 1-2 upshift: 0.18 Sec
Error between desired and actual shift times for latest 2-3 upshift: 0.05 Sec
Force motor (PCS) - Duty cycle: 40.6 %
Force motor (PCS) - Feedback current: 0.72 Amps
Force motor (PCS) - Reference current: 0.74 Amps
Time of latest 1-2 upshift: 0.18 Sec
Time of latest 2-3 upshift: 0.3 Sec
TCC PWM solenoid duty cycle: 0 %
TCC slippage: 531 RPM
Transmission input speed: 970 RPM
Transmission output speed: 652 RPM
Transmission temperature: 147.6 F°
Turbine speed: 970 RPM
Vehicle speed: 14.5 MPH

__________________________________________________________________
STATUS FLAGS
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
Shift lever:
Drive 4

Cruise control:

TCC mode word 1:
TCC is being forced off
TCC enable solenoid valid
Low threshold for COPETCC selected
Use hyst. for vehicle speed
TCC is in release mode, slipping
TCC is in locked-adjust mode
TCC is being applied
Negative slip recently prevents apply

TCC mode word 2:
TCC PWM is on
• Perform release
Perform apply
Min. threshold occurred
TCC Bus. is valid
NDT occurs
Delay is in progress
Min. throttle occured

IOD port A:
Glow plug relay - Closed/Open
• Stepper motor inhibit - Run/Inhibit
Service Throttle Lamp - On/Off
• EGR vent enable - On/Off
Shift A - On/Off
Shift B - On/Off
TCC enable - On/Off (4L60E only)
• Force Motor enable - On/Off

IOD SOD status register:
Coolant temp. pullup select - On/Off
Trans. temp. pullup select - On/Off
Fuel calibration temp. select - On/Off
Check Engine Lamp - On/Off
PWM1 - Reset/Normal
PWM2 - Reset/Normal
PWM3 - Reset/Normal
PWM4 - Reset/Normal

System status word:
FM shut off due to low battery
Force Motor pulse in progress
• Power is On/Off
COP2 is being serviced
Delco instrumentation PROM
• Powertrain is in motion

Discrete flags:
Brake - On/Off
A/C Compressor - Engaged/Disengaged
Power enrichment - Active/Inactive
Kickdown pattern - Active/Inactive
Four-Wheel Drive Low - Active/Inactive
Cruise low - Active/Inactive
Diagnostic - Requested/Not requested


__________________________________________________________________
 
Whoops, that screen shot was at 1500rpms.
Here is the idle one:
__________________________________________________________________
ENGINE SENSORS
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
Engine run time: 00:16:24
Boost pressure (MAP): 14.2 PSI
Desired EGR: 11.6 PSI
Desired idle: 562 RPM
EGR pressure: 11.6 PSI
EGR duty cycle: 41.4 %
Engine coolant temp: 190.1 F°
Engine speed: 544 RPM
Glow plug relay feedback: 0.1 Volts
Glow plug voltage: 0.2 Volts
Ignition voltage: 13 Volts
Wastegate duty cycle: 84 %

__________________________________________________________________
INFORMATION SENSORS
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
PCM Calibration ID: 4805
Current DTCs: 0
Accel. ped. pos. 1: 0.55 Volts
Accel. ped. pos. 2: 4.53 Volts
Accel. ped. pos. 3: 4.12 Volts
Barometric pressure (BARO): 13.34 PSI
Battery voltage: 12.7 Volts
Fuel temperature: 109.7 F°
Intake air temp: 115.6 F°
Throttle position: 0 %
Turbo boost (Calculated): 0.86 PSI
Voltage reference sensor: 1.3 Volts

__________________________________________________________________
INJECTION PUMP SENSORS
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
Actual injection pump timing: 32.21 Deg °
Cam reference missed: 0 Counts
Crank reference missed: 0 Counts
Fuel calibration: 150 Counts
Fuel rate: 8.44 mm³
Fuel rate - Cruise: 0 mm³
Fuel rate - Idle: 8.12 mm³
Fuel rate - Maximum transient: 44.69 mm³
Fuel rate - Throttle requested: 0 mm³
Injection pulse width: 2.08 ms
Injection timing - Measured: 10.1 Deg °
Injection timing - Desired: 9.6 Deg °
TDC offset: -1.94 Deg °

__________________________________________________________________
TRANSMISSION SENSORS
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
3-2 PWM solenoid duty cycle: 0 %
Cruise target speed: 0 MPH
Cruise speed error: 0 MPH
Current gear of transmission: 1 Gear
Current torque signal pressure: 25 PSI
Current transmission ratio: 1:4 Ratio
Error between desired and actual shift times for latest 1-2 upshift: 6.3 Sec
Error between desired and actual shift times for latest 2-3 upshift: 0.2 Sec
Force motor (PCS) - Duty cycle: 37.5 %
Force motor (PCS) - Feedback current: 0.64 Amps
Force motor (PCS) - Reference current: 0.64 Amps
Time of latest 1-2 upshift: 0.4 Sec
Time of latest 2-3 upshift: 0.1 Sec
TCC PWM solenoid duty cycle: 0 %
TCC slippage: -35 RPM
Transmission input speed: 602 RPM
Transmission output speed: 0 RPM
Transmission temperature: 165.2 F°
Turbine speed: 602 RPM
Vehicle speed: 0 MPH

__________________________________________________________________
STATUS FLAGS
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
Shift lever:
Park/Neutral

Cruise control:

TCC mode word 1:
TCC is being forced off
TCC enable solenoid valid
Low threshold for COPETCC selected
Use hyst. for vehicle speed
TCC is in release mode, slipping
TCC is in locked-adjust mode
TCC is being applied
• Negative slip recently prevents apply

TCC mode word 2:
TCC PWM is on
Perform release
Perform apply
• Min. threshold occurred
TCC Bus. is valid
NDT occurs
Delay is in progress
Min. throttle occured

IOD port A:
Glow plug relay - Closed/Open
• Stepper motor inhibit - Run/Inhibit
Service Throttle Lamp - On/Off
• EGR vent enable - On/Off
• Shift A - On/Off
Shift B - On/Off
TCC enable - On/Off (4L60E only)
• Force Motor enable - On/Off

IOD SOD status register:
Coolant temp. pullup select - On/Off
Trans. temp. pullup select - On/Off
Fuel calibration temp. select - On/Off
Check Engine Lamp - On/Off
PWM1 - Reset/Normal
PWM2 - Reset/Normal
PWM3 - Reset/Normal
PWM4 - Reset/Normal

System status word:
FM shut off due to low battery
Force Motor pulse in progress
• Power is On/Off
COP2 is being serviced
Delco instrumentation PROM
• Powertrain is in motion

Discrete flags:
Brake - On/Off
A/C Compressor - Engaged/Disengaged
Power enrichment - Active/Inactive
Kickdown pattern - Active/Inactive
Four-Wheel Drive Low - Active/Inactive
Cruise low - Active/Inactive
Diagnostic - Requested/Not requested


__________________________________________________________________
 
Your ign voltage is 13.1 but your battery voltage is 12.7

You have a .4v drop somewhere.....
 
Does pulsewidth change with a different PMD?

Clean all battery cables - especially the one that runs to the alternator.

See if you can get those two battery voltages to be within .1v of each other.
 
OK, One thing I did notice when I first connected GMTDScan to the truck today Bill had told me to compare ECT to IAT to Ambient with truck not run in 24 hrs. They all matched . But wha I noticed was the battery voltage was 11.2 with truck off sitting over night. When glow plugs came on voltage dropped to 10.6 volts not cranking just with glowplugs activated. When I did the load test yesterday on both batts they both tested good but the passenger side one read 11 drivers side read 12 under load. Also I have the D Tech PMD could that use more power than standyne ?
 
How old are the batteries?

When my batteries were low on charge after my IP install I had a pulsewidth of 2.00ms....charging them up fixed the problem.
 
I have a DTech and it makes no difference, but a bad PMD can throw out pulsewidth...
 
They could be old, they came with the truck. I never liked interstate batteries anyway. The Dtech is brand new and I got it from Accurate.
 
OK so I took advice and saved 90$ and made my own IP wrench. Easy to do with a rosebud. The craftsman club(didn't think I'd use a Snap On did you ? My 15mm Snap On was like 30$)I used worked pretty good except I had to temporarily remove the return line off the IP to get full swing. As for turning tool no need for one. Just take 2 short 3/8 bolts, stick em in the holes on the pump and put a small prybar between them.
 

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Chris ,
Just to clarify I did the TDCO right I was supposed to hit off on the learn when it got to -1.94 right not just let it set itself ?
 
I have a pair of needle-nose pliers like those... they were my Grandpa's. They're older than me!
 
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