Boys,
I managed to get a replacement Throttle body. But all I did was just swap the stepper motor and my car is now fine. I intend to also swap the TPS sensor and do a complete tuning check at Proton this week. Just for you guys to learn, below is the chronology of my Fluctuating RPM Problem...
Problem Symtom : Fluctuating PRM Meter from 1K to below the moment Aircon is switched on
: Car dies off at gear shift from "P" to "D"
: Jerking and noticeable gear changes during slow drives
What was done : Serviced the Air-con system
: Did a Diagnosis check and confirmed the stepper motor was faulty
: Cleaned the whole throttle body unit
Confirmation : Swapped a stepper motor and problem was solved
Action : Bought a used Throttle body unit as the stepper motors are seldom sold alone
: Swapped the stepper motor
Current Status : RPM Meter is stable,
: Driving is smoother and back to normal,
: Problem solved but car is under monitoring for a month
Future Corrective Acction : I've passed my faulty stepper motor to check if it can be repaired
: What I've heard offline is that the heat from the engine is the
cause of failure
: I've also written to some experts to confirm the actual function of
the stepper motor in the throttle body and what are the known
cause of failures...
I hope my experience will be helpful to you in the future. Also, Thanks to JJ.V6 in particular for plugging me through, to a throttle body unit. If you guys are in Penang make sure to compare the charges among Proton service centres. Different centres charge differently wuo. One Service centre said just to check engine tuning is RM85 while another is RM35. I spent only RM50 for tuning, cleaning the throttle body, swapping stepper motor and re-installation.
---------- Post added at 10:57 AM ---------- Previous post was at 10:51 AM ----------
Nan83,
I must say, your information is completely superb. I haven't checked the ohm value. Myself not so pandai laa. Hehehe.
But once again, thanks alot for your information.
