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Lacostas · 01-28-2025, 12:40 PM

Hey all!

Been trying to track an annoying electrical issue on my 2.7 M9623 (2004) that has been nagging me for at least a year. Bought an iCarSoft POR 3.0 and here are the results:

No CEL/codes
Whenever there is extra load (i.e A/C ON, fans, lights), the Battery Voltage drops from normal 14.2 V to 13.2 and then it tries slowly to get back up (car shaking)
Same happens whenever there is no extra load on idle and i slightly press the gas pedal increasing the rpms by a bit.
Throttle Position Sensor 1 Voltage shows ±3V and Sensor-2 shows 17V. Their combined voltage seems to always be around 20V which seems extremely high(?)

Car has eGas, Battery is 3 monhts old. Remanufactured alternator a year ago and the issue persisted.

Thanks!

01-28-2025, 12:40 PM	#1
Lacostas Registered User Join Date: Oct 2017 Location: Europe Posts: 131	TPS Sensor Voltage 17V Hey all! Been trying to track an annoying electrical issue on my 2.7 M9623 (2004) that has been nagging me for at least a year. Bought an iCarSoft POR 3.0 and here are the results: No CEL/codes Whenever there is extra load (i.e A/C ON, fans, lights), the Battery Voltage drops from normal 14.2 V to 13.2 and then it tries slowly to get back up (car shaking) Same happens whenever there is no extra load on idle and i slightly press the gas pedal increasing the rpms by a bit. Throttle Position Sensor 1 Voltage shows ±3V and Sensor-2 shows 17V. Their combined voltage seems to always be around 20V which seems extremely high(?) Car has eGas, Battery is 3 monhts old. Remanufactured alternator a year ago and the issue persisted. Thanks! Last edited by Lacostas; 01-28-2025 at 12:43 PM.