Need Help With Timing

[preachermic]

I've read and read and I can't figure this out. My timing is desired 9.5 and actual 9.5 with the TDC offset at -2.02. What do I do? I am getting a TDC offset error. I am also getting a code 83: TCC Solenoid.(related or not?)

 

[preachermic]

BTW I am using GMCTd Scantech.

 

[gmctd]

TDCO cannot change if:
- any other DTC is logged, current or history - you'll need to clear that DTC83 and any others, as well as the TDCO DTC to proceed
- ECT must be above 172*, 180-190* is good - IAT above 85*

TIMESET should be +3.5*, TIMING should be +8.5, not +9.5*
TDCO of -2.02* should not DTC

 

[chrisk1500]

Typo? -2.20 sets a DTC

If you have a TDCO error and -2.20 you need to get the engine up to temp, clear all codes and rotate the pump towards the driver's side a touch....make sure all codes are clear and the ECT is 175*+ as gmctd already said and run a TDCO Learn....

 

[preachermic]

I have hit the button to reset the codes but they do not go away. Truck was previously 9.1-9.1 -1.67. When I went to check if everything was still the same this is where I ended up at.

 

[preachermic]

My last post should read 9.1 9.1 -1.67

 

[chrisk1500]

Gotta rotate the pump....

 

[preachermic]

Thanks Chris,which way?

 

[gmctd]

OBD1 requires TIMESET before TDCO LEARN - rotate the IP towards turbo to decrease timing (-) and TDCO - or - towards the power brake booster to increase timing (+) and TDCO - (~2.5mm = 5*) - after TIMESET when DESIRED\MEASURED TIMING reads correct, as in +8.5*, do TDCO LEARN, then exit and observe the new value: if not what you want, again do TDCO LEARN, slowly rev the engine up to ~1200-1500rpm and hold it steady, exit when you see the TDCO number you like: -1.5* to -1.94* - final numbers in this case should be +8.5* Desired\Measured timing, your choice between -1.5* to -1.94* TDCO...........................

 

[preachermic]

Thank You

 

[chrisk1500]

jd - he is running Heath's chip....methinks he will find different timing numbers than the ones you have written....

My guess is you will find measured and actual at the 10.5* mark....

 

[gmctd]

I'm running MaxETork also - the chip cannot vary the basic timing specs derived from mechanical IP position relative to crankshaft position - only the owner\hacker and timingtrain wear can do that - only the fuel rate curves within the timing specs can be adjusted with software, plus maybe the DESIRED timing within those specs - but never the MEASURED timing - I would doubt whether the TDCO relationship has been altered, also, as that is based on the camring ramping factor.

 

[Sunshine]

gmtcd i hope this note finds you well...i try not to say to,o,o much, it`s a case of,.. watch, listen, & learn,... what would we do with out you, your the ice-ing on the cake.. have a peaceful weekend...

You know were we need to go....

/Paul....

 

[chrisk1500]

I'm running MaxETork also - the chip cannot vary the basic timing specs derived from mechanical IP position relative to crankshaft position - only the owner\hacker and timingtrain wear can do that - only the fuel rate curves within the timing specs can be adjusted with software, plus maybe the DESIRED timing within those specs - but never the MEASURED timing - I would doubt whether the TDCO relationship has been altered, also, as that is based on the camring ramping factor.

I wonder why my timing is 10.9 desired and actual with the HP4....

__________________________________________________________________
ENGINE SENSORS
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Engine run time: 00:02:05
Boost pressure (MAP): 13.61 PSI
Desired EGR: 15.23 PSI
Desired idle: 656 RPM
EGR pressure: 13.63 PSI
EGR duty cycle: 0 %
Engine coolant temp: 191 F°
Engine speed: 638 RPM
Glow plug relay feedback: 0.1 Volts
Glow plug voltage: 0.1 Volts
Ignition voltage: 13.1 Volts
Wastegate duty cycle: 94.5 %

__________________________________________________________________
INFORMATION SENSORS
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
PCM Calibration ID: 4735
Current DTCs: 0
Accel. ped. pos. 1: 0.69 Volts
Accel. ped. pos. 2: 4.33 Volts
Accel. ped. pos. 3: 4.02 Volts
Barometric pressure (BARO): 12.76 PSI
Battery voltage: 13 Volts
Fuel temperature: 126.4 F°
Intake air temp: 96.9 F°
Throttle position: 0 %
Turbo boost (Calculated): 0.86 PSI
Voltage reference sensor: 1.3 Volts

__________________________________________________________________
INJECTION PUMP SENSORS
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
Actual injection pump timing: 33.44 Deg °
Cam reference missed: 0 Counts
Crank reference missed: 0 Counts
Fuel calibration: 115 Counts
Fuel rate: 9.38 mm³
Fuel rate - Cruise: 0 mm³
Fuel rate - Idle: 9.06 mm³
Fuel rate - Maximum transient: 69.06 mm³
Fuel rate - Throttle requested: 0 mm³
Injection pulse width: 1.8 ms
Injection timing - Measured: 10.9 Deg °
Injection timing - Desired: 10.9 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: 31 PSI
Current transmission ratio: 1:4 Ratio
Error between desired and actual shift times for latest 1-2 upshift: 0 Sec
Error between desired and actual shift times for latest 2-3 upshift: 0 Sec
Force motor (PCS) - Duty cycle: 35.5 %
Force motor (PCS) - Feedback current: 0.62 Amps
Force motor (PCS) - Reference current: 0.62 Amps
Time of latest 1-2 upshift: 0 Sec
Time of latest 2-3 upshift: 0 Sec
TCC PWM solenoid duty cycle: 0 %
TCC slippage: -34 RPM
Transmission input speed: 692 RPM
Transmission output speed: 0 RPM
Transmission temperature: 162.5 F°
Turbine speed: 692 RPM
Vehicle speed: 0 MPH

__________________________________________________________________
STATUS FLAGS
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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

 

[gmctd]

I see your Baro is way low, or you live way up a mountain, which is why PCM is calling for 96% w\g duty cycle, and could be why PCM wants 10.9* D\A timing at idle with ECT and IAT at normal operating temps

Desired Timing is what PCM is demanding within the lo\hi limits set by physical IP position as measured during TIMESET, and Measured Timing is the actual position of the Camring\Optic Sensor within the 11* mechanical limits of the IP housing - total Camring rotation is ~11* stop-to-stop, which is 22* crank - at 10.5* D\M timing, likely you've rotated\locked the IP further than what is considered acceptable - if you were to advance it even further TIMESET would faithfully report the new position to PCM - 'course, the engine might not start due to the extreme advance, and PCM would definitely set a DTC on TDCO LEARN - +10.5* Des\Meas timing indicates too much mechanical\physical advance to me - again, engine rpm can be increased so PCM sees varying advance positions and will display several values of TDCO within those limits determined during the TIMESET measurement - if you exit TDCO LEARN when you see your favorite number, PCM will lock that number in and use it from then on, at least, until the next time you get sweaty palms from thinking about all the neat stuff you can do to an OBD1 6.5 with GMTD Scan...................

 

[Turbine Doc]

I'll have a look at my HP4 at idle timing tomorrow IIRC it sits a little higher than 8.5 stock timing

 

[Sunshine]

With my HP4 i get this reading: 10.1 Des, 10.00 Mes, TDCO -1.67
Bravo:13.29 psi
Map : 14.01 psi
W/G :83.2%
Act IP Timing 32.47Deg*
Fuel rate Idle 7.5mm*
Engine Coolant temp was at 130F*& Intake Air temp was 51F*

I`m living 60deg* North of the Equator

 

[chrisk1500]

What do you have Tim?

I am sure it is the HP4 that gives the 10ish degrees of timing...

 

[Acesneights1]

OK I still don't get the timing and timeset. I have GMTDScan. Bill H told me to just set the TDCO and leave time set alone but here was my last screen shot because my actual is even higher and I'm running heath maxetorq ? Is it not set right ?
http://www.dieseltowingresource.com/showthread.php?t=2131&page=5
Wait I'm a putts. I was reading the screenshot I did at 1500 rpms. The one at idle was same as ChrisK with Heath V2

 

[chrisk1500]

That's what I'm getting at Kenny....

Bill said to expect desired and actual to be above 8.5* (as tuned) and jd says something's wrong....

I would sure like to see Tim's numbers....got that laptop hooked up yet?