buddy
Active Member
In GMTDScan there is a calculated boost, but then also a boost sensor readout that includes atmospheric, so adds the baro pressure. You were probably seeing the boost sensor and not the calculated.
-
Welcome to The Truck Stop! We see you haven't REGISTERED yet.
Your truck knowledge is missing!
- Registration is FREE , all we need is your birthday and email. (We don't share ANY data with ANYONE)
- We have tons of knowledge here for your diesel truck!
- Post your own topics and reply to existing threads to help others out!
- NO ADS! The site is fully functional and ad free!
Problems registering? Click here to contact us!
Already registered, but need a PASSWORD RESET? CLICK HERE TO RESET YOUR PASSWORD!
Ok the turbo stopped working tonight
- Thread starter Crankme69
- Start date
Crankme69
New Member
The wastegate solenoid seems to work fine. I isolated the vacuum to the other 2 EGR solenoids & BARO sensor attempting to trouble shoot them one at a time. Truck runs fine but it's lighting up the SES light like this.
Searching for how the 3 solenoids & Baro sensor all work and what they supply to the ECM it appears that one of my EGR solenoids is suspect, but that is gonna take more trouble shooting tomorrow to confirm.
Still not convinced I understand how or what they provide with regards to the BARO sensor...
I would really like to keep my vacuum operated wastegate & dump the EGR solenoids, but I'm not sure about what I can do short term if one of them is bad until I get a new chip to keep it from tripping the SES light?
The chip is on hold until I hook up my gauges...kinda think I'm stuck until the gauges are installed...
Searching for how the 3 solenoids & Baro sensor all work and what they supply to the ECM it appears that one of my EGR solenoids is suspect, but that is gonna take more trouble shooting tomorrow to confirm.
Still not convinced I understand how or what they provide with regards to the BARO sensor...
I would really like to keep my vacuum operated wastegate & dump the EGR solenoids, but I'm not sure about what I can do short term if one of them is bad until I get a new chip to keep it from tripping the SES light?
The chip is on hold until I hook up my gauges...kinda think I'm stuck until the gauges are installed...
Crankme69
New Member
Well unless the info I found was wrong or i did not interpret it correcty, that's very possible, the calculated boost in the GMTD scan uses the boost sensor minus the Baro sensor?
Right now my baro is tied into the line that is driving my wastegate actuator. The original location is the line from the EGR solenoid the drive the EGR valve. They must have significamtly different vacuum measurements?
ak diesel driver
6.5 driver
I was under the impression that it gives you atmospheric pressure. So 1 pound of boost would read 14.7
Crankme69
New Member
What or how does the Baro sensor work if it's tied into the vacuum line for the EGR solenoid? Is that solenoid that drives the EGR valve at atmospheric pressure?
buddy
Active Member
It is both a Barometer and a Vacuum sensor. When you turn the key to ON it reads what the atomspheric pressure is, then thats done, and when you start it reads vacuum.
So it doesnt matter what vacuum line its hooked up to. As long as its reading vacuum it wont code for that. The F engines use that exact same sensor as just a barometer with no vac line hooked to it.
The boost sensor is the one on the intake, and it reads boost + atmospheric, then GMTDScan takes the reading from the Baro sensor and subtracts it to give you the calcualted boost.
That sensor on the firewall doesnt drive anything, just makes sure there is vacuum while operating. The EGR solenoids are driven by the PCM based on RPMs, and throttle position.
So it doesnt matter what vacuum line its hooked up to. As long as its reading vacuum it wont code for that. The F engines use that exact same sensor as just a barometer with no vac line hooked to it.
The boost sensor is the one on the intake, and it reads boost + atmospheric, then GMTDScan takes the reading from the Baro sensor and subtracts it to give you the calcualted boost.
That sensor on the firewall doesnt drive anything, just makes sure there is vacuum while operating. The EGR solenoids are driven by the PCM based on RPMs, and throttle position.
Crankme69
New Member
Buddy does the Wastegate solenoid require one or both of the other 2 solenoids to vent the vacuum off to maintain the desired amount of vacuum to control the wastgate actuator position?
96 OILBURNER
Member
It is controlled by the PCM, which gets its info on boost from the MAP sensor on the intake.
Crankme69
New Member
Ok, well this sure in fudge ain't making no sense to me. I pulled a snapshot last night before I shut the truck off hoping that the info would help me retain the numbers that I was seeing here is the one from last night after I came back from the short run seeing the boost at those huge numbers, be aware NO DTC codes during this run, just the unbelievable high boost numbers, look at the actual pump timing???
Snapshot created 3/5/2010 6:34:31 PM
__________________________________________________________________
ENGINE SENSORS
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
Engine run time: 00:13:10
Boost pressure (MAP): 14.4 PSI
Desired EGR: 13.05 PSI
Desired idle: 562 RPM
EGR pressure: 2.9 PSI
EGR duty cycle: 0 %
Engine coolant temp: 188.2 F°
Engine speed: 562 RPM
Glow plug relay feedback: 0 Volts
Glow plug voltage: 0.2 Volts
Ignition voltage: 13.7 Volts
Wastegate duty cycle: 99.6 %
__________________________________________________________________
INFORMATION SENSORS
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
PCM Calibration ID: 7135
Current DTCs: 0
Accel. ped. pos. 1: 0.59 Volts
Accel. ped. pos. 2: 4.43 Volts
Accel. ped. pos. 3: 4.08 Volts
Barometric pressure (BARO): 2.05 PSI
Battery voltage: 13.6 Volts
Fuel temperature: 85.3 F°
Intake air temp: 82.2 F°
Throttle position: 0 %
Turbo boost (Calculated): 12.35 PSI
Voltage reference sensor: 1.3 Volts
__________________________________________________________________
INJECTION PUMP SENSORS
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
Actual injection pump timing: 33.26 Deg °
Cam reference missed: 0 Counts
Crank reference missed: 0 Counts
Fuel calibration: 150 Counts
Fuel rate: 5.62 mm³
Fuel rate - Cruise: 0 mm³
Fuel rate - Idle: 5.94 mm³
Fuel rate - Maximum transient: 42.5 mm³
Fuel rate - Throttle requested: 0 mm³
Injection pulse width: 1.67 ms
Injection timing - Measured: 10.5 Deg °
Injection timing - Desired: 10.4 Deg °
TDC offset: -0.18 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: 6.38 Sec
Error between desired and actual shift times for latest 2-3 upshift: 0.02 Sec
Force motor (PCS) - Duty cycle: 42.6 %
Force motor (PCS) - Feedback current: 0.8 Amps
Force motor (PCS) - Reference current: 0.8 Amps
Time of latest 1-2 upshift: 0.32 Sec
Time of latest 2-3 upshift: 0.28 Sec
TCC PWM solenoid duty cycle: 0 %
TCC slippage: 16 RPM
Transmission input speed: 35 RPM
Transmission output speed: 0 RPM
Transmission temperature: 145 F°
Turbine speed: 35 RPM
Vehicle speed: 0 MPH
__________________________________________________________________
STATUS FLAGS
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
Shift lever:
Park/Neutral
Cruise control:
Cruise Off condition
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
__________________________________________________________________
Snapshot created 3/5/2010 6:34:31 PM
__________________________________________________________________
ENGINE SENSORS
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
Engine run time: 00:13:10
Boost pressure (MAP): 14.4 PSI
Desired EGR: 13.05 PSI
Desired idle: 562 RPM
EGR pressure: 2.9 PSI
EGR duty cycle: 0 %
Engine coolant temp: 188.2 F°
Engine speed: 562 RPM
Glow plug relay feedback: 0 Volts
Glow plug voltage: 0.2 Volts
Ignition voltage: 13.7 Volts
Wastegate duty cycle: 99.6 %
__________________________________________________________________
INFORMATION SENSORS
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
PCM Calibration ID: 7135
Current DTCs: 0
Accel. ped. pos. 1: 0.59 Volts
Accel. ped. pos. 2: 4.43 Volts
Accel. ped. pos. 3: 4.08 Volts
Barometric pressure (BARO): 2.05 PSI
Battery voltage: 13.6 Volts
Fuel temperature: 85.3 F°
Intake air temp: 82.2 F°
Throttle position: 0 %
Turbo boost (Calculated): 12.35 PSI
Voltage reference sensor: 1.3 Volts
__________________________________________________________________
INJECTION PUMP SENSORS
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
Actual injection pump timing: 33.26 Deg °
Cam reference missed: 0 Counts
Crank reference missed: 0 Counts
Fuel calibration: 150 Counts
Fuel rate: 5.62 mm³
Fuel rate - Cruise: 0 mm³
Fuel rate - Idle: 5.94 mm³
Fuel rate - Maximum transient: 42.5 mm³
Fuel rate - Throttle requested: 0 mm³
Injection pulse width: 1.67 ms
Injection timing - Measured: 10.5 Deg °
Injection timing - Desired: 10.4 Deg °
TDC offset: -0.18 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: 6.38 Sec
Error between desired and actual shift times for latest 2-3 upshift: 0.02 Sec
Force motor (PCS) - Duty cycle: 42.6 %
Force motor (PCS) - Feedback current: 0.8 Amps
Force motor (PCS) - Reference current: 0.8 Amps
Time of latest 1-2 upshift: 0.32 Sec
Time of latest 2-3 upshift: 0.28 Sec
TCC PWM solenoid duty cycle: 0 %
TCC slippage: 16 RPM
Transmission input speed: 35 RPM
Transmission output speed: 0 RPM
Transmission temperature: 145 F°
Turbine speed: 35 RPM
Vehicle speed: 0 MPH
__________________________________________________________________
STATUS FLAGS
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
Shift lever:
Park/Neutral
Cruise control:
Cruise Off condition
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
__________________________________________________________________
Crankme69
New Member
Here is a snap shot from a few days prior???
Look at how they compare BARO reading & pump timing numbers WTF is going on here...???
Snapshot created 3/2/2010 4:17:34 PM
__________________________________________________________________
ENGINE SENSORS
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
Engine run time: 00:01:01
Boost pressure (MAP): 14.2 PSI
Desired EGR: 11.75 PSI
Desired idle: 562 RPM
EGR pressure: 13.05 PSI
EGR duty cycle: 46.1 %
Engine coolant temp: 177.1 F°
Engine speed: 544 RPM
Glow plug relay feedback: 0.1 Volts
Glow plug voltage: 0.2 Volts
Ignition voltage: 13.6 Volts
Wastegate duty cycle: 70.3 %
__________________________________________________________________
INFORMATION SENSORS
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
PCM Calibration ID: 7135
Current DTCs: 0
Accel. ped. pos. 1: 0.57 Volts
Accel. ped. pos. 2: 4.45 Volts
Accel. ped. pos. 3: 4.1 Volts
Barometric pressure (BARO): 13.56 PSI
Battery voltage: 13.5 Volts
Fuel temperature: 92.6 F°
Intake air temp: 91.8 F°
Throttle position: 0 %
Turbo boost (Calculated): 0.64 PSI
Voltage reference sensor: 1.3 Volts
__________________________________________________________________
INJECTION PUMP SENSORS
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
Actual injection pump timing: 29.66 Deg °
Cam reference missed: 0 Counts
Crank reference missed: 0 Counts
Fuel calibration: 150 Counts
Fuel rate: 6.25 mm³
Fuel rate - Cruise: 0 mm³
Fuel rate - Idle: 5.94 mm³
Fuel rate - Maximum transient: 42.5 mm³
Fuel rate - Throttle requested: 0 mm³
Injection pulse width: 1.68 ms
Injection timing - Measured: 7.3 Deg °
Injection timing - Desired: 7.4 Deg °
TDC offset: -0.18 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: 0.3 Sec
Error between desired and actual shift times for latest 2-3 upshift: 0 Sec
Force motor (PCS) - Duty cycle: 44.1 %
Force motor (PCS) - Feedback current: 0.8 Amps
Force motor (PCS) - Reference current: 0.82 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: 17 RPM
Transmission input speed: 542 RPM
Transmission output speed: 0 RPM
Transmission temperature: 143.6 F°
Turbine speed: 542 RPM
Vehicle speed: 0 MPH
__________________________________________________________________
STATUS FLAGS
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
Shift lever:
Park/Neutral
Cruise control:
Cruise Off condition
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
__________________________________________________________________
GMTDScan Tech © Engh Motors - www.EnghMotors.com
Look at how they compare BARO reading & pump timing numbers WTF is going on here...???
Snapshot created 3/2/2010 4:17:34 PM
__________________________________________________________________
ENGINE SENSORS
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
Engine run time: 00:01:01
Boost pressure (MAP): 14.2 PSI
Desired EGR: 11.75 PSI
Desired idle: 562 RPM
EGR pressure: 13.05 PSI
EGR duty cycle: 46.1 %
Engine coolant temp: 177.1 F°
Engine speed: 544 RPM
Glow plug relay feedback: 0.1 Volts
Glow plug voltage: 0.2 Volts
Ignition voltage: 13.6 Volts
Wastegate duty cycle: 70.3 %
__________________________________________________________________
INFORMATION SENSORS
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
PCM Calibration ID: 7135
Current DTCs: 0
Accel. ped. pos. 1: 0.57 Volts
Accel. ped. pos. 2: 4.45 Volts
Accel. ped. pos. 3: 4.1 Volts
Barometric pressure (BARO): 13.56 PSI
Battery voltage: 13.5 Volts
Fuel temperature: 92.6 F°
Intake air temp: 91.8 F°
Throttle position: 0 %
Turbo boost (Calculated): 0.64 PSI
Voltage reference sensor: 1.3 Volts
__________________________________________________________________
INJECTION PUMP SENSORS
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
Actual injection pump timing: 29.66 Deg °
Cam reference missed: 0 Counts
Crank reference missed: 0 Counts
Fuel calibration: 150 Counts
Fuel rate: 6.25 mm³
Fuel rate - Cruise: 0 mm³
Fuel rate - Idle: 5.94 mm³
Fuel rate - Maximum transient: 42.5 mm³
Fuel rate - Throttle requested: 0 mm³
Injection pulse width: 1.68 ms
Injection timing - Measured: 7.3 Deg °
Injection timing - Desired: 7.4 Deg °
TDC offset: -0.18 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: 0.3 Sec
Error between desired and actual shift times for latest 2-3 upshift: 0 Sec
Force motor (PCS) - Duty cycle: 44.1 %
Force motor (PCS) - Feedback current: 0.8 Amps
Force motor (PCS) - Reference current: 0.82 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: 17 RPM
Transmission input speed: 542 RPM
Transmission output speed: 0 RPM
Transmission temperature: 143.6 F°
Turbine speed: 542 RPM
Vehicle speed: 0 MPH
__________________________________________________________________
STATUS FLAGS
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
Shift lever:
Park/Neutral
Cruise control:
Cruise Off condition
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
__________________________________________________________________
GMTDScan Tech © Engh Motors - www.EnghMotors.com
Crankme69
New Member
Anyone can share some light, is one of my sensors going bad? That appear to be a large change on the pump actual timing & measured numbers???
Maybe I had a small vac leak...???
Hard to believe that a vac leak could change the timing that much, maybe the stepper motor ring was stuck???
Maybe I had a small vac leak...???
Hard to believe that a vac leak could change the timing that much, maybe the stepper motor ring was stuck???
buddy
Active Member
The advance must be from the low atmospheric pressure reading, you would think it might code if it thought you were at 50k ft.
Maybe the atmospheric pressure reading is take right after startup, when there would be no vacuum going to the EGR, so thats why it needs to be hooked up off the back EGR solenoid.
Maybe the atmospheric pressure reading is take right after startup, when there would be no vacuum going to the EGR, so thats why it needs to be hooked up off the back EGR solenoid.
Crankme69
New Member
Ok replaced ALL the vac lines, runs great, but it did code on me 2 times at WOT???
Still seems to be over boosting when ya got the go pedal to the floor, maybe I should just stop doing that lol?
One of them solenoids must be fudged up, but I'm not sure what one...& before I go dumping money into them I might just as well go to a mechanical wastegate.
For now it should be fine if I keep my foot out of it...runs like a raped ape at WOT with 15psi boost. I know better stop doing that or I'll have bigger issues to content with.
Oh & for what it's worth, ya have to hook that Baro up to the EGR sol or it really screws up the reading, at least that was what it did & was repeatable....
Have a good all!
Still seems to be over boosting when ya got the go pedal to the floor, maybe I should just stop doing that lol?
One of them solenoids must be fudged up, but I'm not sure what one...& before I go dumping money into them I might just as well go to a mechanical wastegate.
For now it should be fine if I keep my foot out of it...runs like a raped ape at WOT with 15psi boost. I know better stop doing that or I'll have bigger issues to content with.
Oh & for what it's worth, ya have to hook that Baro up to the EGR sol or it really screws up the reading, at least that was what it did & was repeatable....
Have a good all!
buddy
Active Member
Did you run flexible vac line or keep with the hard plastic?
Definately dont need to be replacing EGR solenoids. The only thing that happens when they code is it shuts down EGR, no other problem.
Definately dont need to be replacing EGR solenoids. The only thing that happens when they code is it shuts down EGR, no other problem.
Crankme69
New Member
All rubber vacuum lines that I covered with the plastic wire loom protector.
Yea I hear ya on the EGR ones, makes me wonder with the shape the plastic lines were in if I didn't have leaks all along, pulling em off to hook up the gauge for check they snapping off like twigs.
Sprayed down all the ground points with WD 40, they will all get cleaned when I swap out the intake.
Yea I hear ya on the EGR ones, makes me wonder with the shape the plastic lines were in if I didn't have leaks all along, pulling em off to hook up the gauge for check they snapping off like twigs.
Sprayed down all the ground points with WD 40, they will all get cleaned when I swap out the intake.