Intermittent lack of power with diacom results 06 SAN TE ZR6

[Ra140]

Hi I am having a bit of trouble with an 06 SAN 210 TE I recently bought. It started with it being in limp mode with an error message Ignition fault see dealer. I replaced the throttle position sensor and sorted that problem. It has LPG and petrol and on LPG it runs perfectly but on petrol it doesn't give full power. Strangely for about 3 days it seemed to clear itself and ran well but now it is back to giving me reduced power. Initially it seemed to be in limp mode but it isn't anymore as the lack of power can happen at any rpm that it decides rather than the 2500 RPM that it did before. Again at the start when it was at idle it ran well but now it seems to want to cut out and then adds a little power to stop that and it never actually cuts out. I don't want to start replacing a lot of different parts (the TAC or ECM) to source the problem if I don't need to as there are no PCM dealers or really anyone with a similar boat nearby. I should add that the problem only happens under load, it will operate normally with the neutral lockout pressed at all RPMs and sometimes revving the boat in neutral can clear the problem but that could be a coincidence.

Thanks for the help.

PERFORMANCE DATA




Parameter Description Value Unit




Engine Speed.......................................... 0 RPM

Calibration Checksum............................... 8B57 HEX

Desired Idle Speed.................................. 744 RPM

Engine Running Time................................ 0,00 Min

Battery Voltage................................... 12,50 VDC

Engine Hours...................................... 911,3 hrs

ECT Temperature.................................... 20,8 °C

Run Time 0-1000 RPM............................... 409,6 hrs

Manifold Air Temperature.......................... -40,0 °C

Run Time 1001-2000 RPM............................ 124,7 hrs

Baro Derived From MAP............................. 100,4 kPa

Run Time 2001-3000 RPM............................ 179,9 hrs

Manifold Absolute Pressure........................ 100,0 kPa

Run Time 3001-4000 RPM............................ 191,9 hrs

MAP Sensor Voltage................................. 4,76 VDC

Run Time 4001-5000 RPM.............................. 5,1 hrs

Injector Bank A Pulse Width........................ 25,4 ms

Run Time Over 5000 RPM.............................. 0,1 hrs

Injector Bank B Pulse Width........................ 25,4 ms

Max Engine RPM logged ......................... 5851 RPM

IAC Position...................................... 254,0 #

Knock Time.......................................... 0,2 hrs

IAC Throttle Follower............................... 0,0 #

ECM Hardware Version.................................. 4 #

Throttle Position.................................. 14,8 %

ECM Software Release................................. 18 #

Throttle Sensor Voltage............................ 0,00 VDC

ECM Software Revision............................... 161 #

Closed Throttle...................................... ON

Engine Displacement................................. 6,0 L

Spark Advance....................................... 0,1 DEG

Diagnostic Input.................................... OFF

Engine Knock........................................ OFF

Fuel Pump Output.................................... OFF

Knock Retard....................................... 0,00 DEG

Gen Warning 1 Input.................................. ON

Octane Rating Adapt................................ 99,6 %

Gen Warning 1 Lamp Output........................... OFF

Cam Retard......................................... 0,00 DEG

Check Gauges Lamp Output............................ OFF

Fuel Flow Rate..................................... 0,00 LPH

Low Oil Pressure Input.............................. OFF

Engine Type........................................... 8 #

Malfunction Indicator Lamp........................... ON

Starts Without Malfunctions........................... 0 #

Rev Limiter Status.................................. OFF

Number of Cylinders................................... 8 #

Shift Interrupt Input............................... OFF

Starts Without Warning.............................. 255 #

Warning Buzzer Output................................ ON

Total Trouble Codes................................... 8

RPM Reduction Control............................... OFF

Disable Injector Bank............................... OFF

Cam Sensor Present................................... ON

58x Crank........................................... OFF

7x Crank............................................ OFF

24x Encoded Crank.................................... ON

TAC Module Present................................... ON

Emergency Stop Enable............................... OFF

Speed Sensor Present................................. ON

EGR Present......................................... OFF

Two ATM MAP Present................................. OFF

MAT Sensor Present.................................. OFF

GPH Calculation Enable............................... ON

Peak & Hold Injectors............................... OFF

Skip Double Fire..................................... ON

Relearn Closed TPS.................................. OFF

Alternate Fuel Spark Curve.......................... OFF

Allow Cyl Balance Test............................... ON

Allow Paired Firing.................................. ON

Bypass Spark System................................. OFF

Multiple EST Outputs................................. ON

Spark Current Clamped............................... OFF

Load Anticipate 1 Enable............................ OFF

Load Anticipate 2 Enable............................ OFF

Adapter Load 1 Enable............................... OFF

Adapter Load 2 Enable............................... OFF

Knock Detection Enable............................... ON

Governor Sync Enable................................. ON

Governor Controls MPH............................... OFF

Governor Present..................................... ON

Twin Shift Sync Enable.............................. OFF

Upshift Control Enable.............................. OFF

CCP Enable.......................................... OFF

Troll Mode Enable................................... OFF

Shift Interrupt Enable.............................. OFF

Shift Interrupt Kill Enable......................... OFF

RPM Output Enable................................... OFF

Fuel Temp Sensor Present............................ OFF

Fuel Pres Sensor Present............................ OFF

Wide Range O2 Sensors................................ ON

Oxygen Sensor 1 Present.............................. ON

Oxygen Sensor 2 Present............................. OFF

Governor Speed Lamp Enable........................... ON

Bosch MAT / MAP Sensor.............................. OFF

Buss Master ECM...................................... ON

Octane Adapt Enable................................. OFF

Variable Speed Gov Enable............................ ON

Emergency Stop Input................................ OFF

Troll Mode Input.................................... OFF

Low Oil Level Input................................. OFF

Gen Warning 2 Input................................. OFF

Low Oil Level Lamp Output........................... OFF

Gen Warning 2 Lamp Output........................... OFF

RPM Based Output.................................... OFF

Monitoring For Knock................................ OFF

Logged NV RAM Fault................................. OFF

Stall or Reset...................................... OFF

Logged RTI Overflow................................. OFF

Troll Mode.......................................... OFF

Low Oil On Last Check............................... OFF

Oil Draining Back................................... OFF

Upshift Conditions.................................. OFF

Shift Interrupt Kill Mode........................... OFF

Closed Loop......................................... OFF

Oxygen Sensor 1 Rich................................. ON

Oxygen Sensor 2 Rich................................ OFF

Governor Over MPH................................... OFF

Governor Over RPM................................... OFF

Governed RPM Speed.................................. OFF

Governor MPH Control................................ OFF

Governor RPM Control................................ OFF

Octane Adapt Active................................. OFF

Oil Pressure Sensor Voltage........................ 5,00 VDC

Vehicle Speed....................................... 0,0 KPH

Gov Desired TPS.................................... 99,6 %

Gov Motor Duty Cycle................................ 0,0 %

Canister Purge Duty Cycle........................... 0,0 %

ETC Pedal Position.................................. 0,0 %

ETC Throttle Sensor Counts........................ 31981 #

ETC Desired Pedal Position.......................... 0,0 %

ETC Desired Throttle Counts....................... 32000 #

ETC Pedal Sensor Counts............................ 2560 #

Oxygen Sensor 1 Voltage............................ 1157 mV

Oxygen Sensor 2 Voltage............................. 464 mV

Oxygen Sensor 1 Transitions......................... 0,0 #

Oxygen Sensor 2 Transitions......................... 0,0 #

Block Learn Cell.................................... 0,0 #

O2 Sensor 1 Block Learn........................... 128,0 #

O2 Sensor 2 Block Learn............................. 0,0 #

Desired EGR Position................................ 0,0 #

Actual EGR Position................................. 0,0 #

Absolute EGR Error.................................. 0,0 %

EGR Duty Cycle...................................... 0,0 %

Fuel Pressure Volts................................ 3,21 VDC

Fuel Temp Sensor Volts............................. 0,00 VDC




3. TROUBLE CODE STATUS




Current ECM Codes




(81) Throttle Actuator Control (TAC) Malfunction

(81) Inj A High

(81) Inj A Low/Open

(81) Inj B High

(81) Inj B Low/Open

(81) 5 Volt Reference Malfunction

(81) TAC Fault - Serial Communication Fault

(81) TAC Fault - Lmtd Authority

[Ra140]

Not much help on this problem but in case someone has something similar in the future I thought I would update the thread. A lot of troubleshooting found me at the ECM and more specifically a faulty injector driver. Send it to PCM who agreed and plugged a new on in today and all is well again. If anyone comes across a similar problem in the future feel free to message and Ill give more details as swapping out an ECM is expensive if you are not sure its the right part!