due to high idling rpm, i searched the internet and found a method to tune the RPM back to 750 without using the computer, all done manually.
I have tried it and it worked. initially RPM was idling at 1000, after retune, it is now 750 to 800.
Hope this info helps everyone here.
Disclaimer:
this info is provided as it is, without any warranties what-so-ever. So, use it on your own risk.
---------- Post added at 10:05 AM ---------- 6 hour anti-bump limit - Previous post was at 10:03 AM ----------
DIY Steps in tuning the throttle valve idle position
----------------------------------------------------
!!! Warning: whatever you do, do not touch the orientation of throttle valve position switch & sensor , unless you cannot complete Step 4 !!!
things you need:
1 x multimeter to check ohm
1 x 30cm by 3cm cloth
Terminology:
Throttle Drum - throttle valve open/close lever pulled bu cable from gas paddle
Throttle Opener - the metal cylinder with rod in the middle that is control by vacumm
Throttle Stopper - small screw with a nut to set the position of throttle drum at idling when engine start
Step 1:
- stop engine.
- Confirm that Throttle Opener Rod is in contact with Throttle Drum.
- Confirm that there is a clearance between Throttle Drum and Throttle Stopper.
Step 2:
- start engine, let it idle.
- Confirm that Throttle Opener Rod moves backwards, there is clearance between Throttle Opener Rod and Throttle Drum.
- Confirm that Throttle Drum touches Throttle Stopper.
Step 3:
- start engine, let it warm up to normal operating temperature.
- use the 30cm by 3cm cloth to pull the Throttle Opener Rod back firmly.
- stop engine, the Throttle Opener Rod should not touch Throttle Drum.
Step 4:
- disconnect both throttle position switch(grey connector) and sensor(brown connector) connector.
- use multimeter-ohm setting, check throttle position switch(grey connector) terminals 4 and 5 (upper 2 pin).
- (A) Throttle Drum at idle position, you should get: near-zero ohm reading on multimeter-ohm setting
- (B) push Throttle Drum slightly open (1mm away from Throttle Stopper), you should get: non-zero ohm reading on multimeter-ohm setting
- if (A) or (B) not ok, turn the Throttle Stopper screw clockwise or counterclockwise slightly until you get both (A) and (B) are ok
Step 5:
- start engine, and let it warm up to normal operating temperature
- stop engine
- (A) turn ignition switch to "ON" position and wait at least 5 seconds
- (B) turn ignition switch to "OFF" position and wait at least 10 seconds
- repeat (A) and (B) for 20 times
- start engine, and let it warm up to normal operating temperature
- rev engine 2000 to 3000 rpm for 2 or 3 times
Step 6:
- remove 30cm by 3cm cloth
- re-check Step 1 & Step 2 are ok
Step 7:
- start engine and let it idle
- for A/T, RPM should be around 650 to 750, if not perform "Idle Air Volume Learning"
---------- Post added at 10:06 AM ---------- 6 hour anti-bump limit - Previous post was at 10:05 AM ----------
DIY Steps in Idle Air Volume Learning
--------------------------------------------
things you need:
1 x multimeter to check voltage
1 x 30cm by 3cm cloth
Step 1:
- start engine and let it idle and warm up to normal operating temperature.
- battery voltage at least 12.9V
- off all electrical loads
- use the 30cm by 3cm cloth to pull the Throttle Opener Rod back firmly.
- stop engine, the Throttle Opener Rod should not touch Throttle Drum.
Step 2:
- a) Turn ignition switch “ON” and wait at least 1 second.
- b) Turn ignition switch “OFF” and wait at least 10 seconds.
- c) start engine and warm up to normal operating temperature.
- d) Turn ignition switch “OFF” and wait at least 10 seconds.
- e) Start the engine and let it idle for at least 30 seconds.
- f) Disconnect throttle position sensor harness connector (brown connector), then reconnect it within 5 seconds.
- g) Wait 20 seconds.
- h) Make sure that idle speed is within specifications
- i) Rev up the engine two or three times. Make sure that idle speed and ignition timing are within specifications.
I have tried it and it worked. initially RPM was idling at 1000, after retune, it is now 750 to 800.
Hope this info helps everyone here.
Disclaimer:
this info is provided as it is, without any warranties what-so-ever. So, use it on your own risk.
---------- Post added at 10:05 AM ---------- 6 hour anti-bump limit - Previous post was at 10:03 AM ----------
DIY Steps in tuning the throttle valve idle position
----------------------------------------------------
!!! Warning: whatever you do, do not touch the orientation of throttle valve position switch & sensor , unless you cannot complete Step 4 !!!
things you need:
1 x multimeter to check ohm
1 x 30cm by 3cm cloth
Terminology:
Throttle Drum - throttle valve open/close lever pulled bu cable from gas paddle
Throttle Opener - the metal cylinder with rod in the middle that is control by vacumm
Throttle Stopper - small screw with a nut to set the position of throttle drum at idling when engine start
Step 1:
- stop engine.
- Confirm that Throttle Opener Rod is in contact with Throttle Drum.
- Confirm that there is a clearance between Throttle Drum and Throttle Stopper.
Step 2:
- start engine, let it idle.
- Confirm that Throttle Opener Rod moves backwards, there is clearance between Throttle Opener Rod and Throttle Drum.
- Confirm that Throttle Drum touches Throttle Stopper.
Step 3:
- start engine, let it warm up to normal operating temperature.
- use the 30cm by 3cm cloth to pull the Throttle Opener Rod back firmly.
- stop engine, the Throttle Opener Rod should not touch Throttle Drum.
Step 4:
- disconnect both throttle position switch(grey connector) and sensor(brown connector) connector.
- use multimeter-ohm setting, check throttle position switch(grey connector) terminals 4 and 5 (upper 2 pin).
- (A) Throttle Drum at idle position, you should get: near-zero ohm reading on multimeter-ohm setting
- (B) push Throttle Drum slightly open (1mm away from Throttle Stopper), you should get: non-zero ohm reading on multimeter-ohm setting
- if (A) or (B) not ok, turn the Throttle Stopper screw clockwise or counterclockwise slightly until you get both (A) and (B) are ok
Step 5:
- start engine, and let it warm up to normal operating temperature
- stop engine
- (A) turn ignition switch to "ON" position and wait at least 5 seconds
- (B) turn ignition switch to "OFF" position and wait at least 10 seconds
- repeat (A) and (B) for 20 times
- start engine, and let it warm up to normal operating temperature
- rev engine 2000 to 3000 rpm for 2 or 3 times
Step 6:
- remove 30cm by 3cm cloth
- re-check Step 1 & Step 2 are ok
Step 7:
- start engine and let it idle
- for A/T, RPM should be around 650 to 750, if not perform "Idle Air Volume Learning"
---------- Post added at 10:06 AM ---------- 6 hour anti-bump limit - Previous post was at 10:05 AM ----------
DIY Steps in Idle Air Volume Learning
--------------------------------------------
things you need:
1 x multimeter to check voltage
1 x 30cm by 3cm cloth
Step 1:
- start engine and let it idle and warm up to normal operating temperature.
- battery voltage at least 12.9V
- off all electrical loads
- use the 30cm by 3cm cloth to pull the Throttle Opener Rod back firmly.
- stop engine, the Throttle Opener Rod should not touch Throttle Drum.
Step 2:
- a) Turn ignition switch “ON” and wait at least 1 second.
- b) Turn ignition switch “OFF” and wait at least 10 seconds.
- c) start engine and warm up to normal operating temperature.
- d) Turn ignition switch “OFF” and wait at least 10 seconds.
- e) Start the engine and let it idle for at least 30 seconds.
- f) Disconnect throttle position sensor harness connector (brown connector), then reconnect it within 5 seconds.
- g) Wait 20 seconds.
- h) Make sure that idle speed is within specifications
- i) Rev up the engine two or three times. Make sure that idle speed and ignition timing are within specifications.
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