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1 hour ago, Winson cheah said:

triggering mode is 24-4 

sync mode is raising edge

engine 4ag tvis

 

Are you sure?  4age should be 24 teeth on trigger 1 and 1 tooth on trigger 2?  Both are reluctor sensors so only the falling edge is acceptable.

We would call this a "multitooth" trigger mode.

Can you confirm if you are using the normal 4AGE distributor/CAS? 

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If its the 16 Valve distributor engine then in the distributor you will have a 24 tooth wheel and a 4 tooth wheel, Best option on this is to remove 3 of the 4 teeth to allow full sequential fuel and ignition.

Other option is to only use the 4 teeth and set the trigger mode to tooth per TDC mode and sync to none. This is only good for group fuel and distributor ignition.

 

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1 hour ago, Winson cheah said:

can i know how to set up the TDC offset angle ?

Usually, it is easiest to just do it experimentally with a timing light.  Procedure is here:

l9RfV06.png

 

How to actually measure trigger offset is hard for me to explain clearly in words but here's a quick try: 

To measure trigger offset you need to turn the engine clockwise until the trigger 2 tooth passes it's sensor, then keep rotating until the next trigger 1 tooth aligns with its sensor, we will call this the "index tooth".  Zero your degree wheel or measuring device here.  The "trigger offset" is the amount of crank degrees from this "index tooth" position until TDC #1 compression. Trigger offset can only range from +360° to -360° so if the clockwise angular distance from the index tooth until TDC#1 is more than 360°, then you need to subtract 720 from your final number.  A couple of examples:

If the measured rotation from the index tooth to TDC#1 was 230°, then the trigger offset number would be 230°.

If the measured rotation from the index tooth to TDC#1 was 570° (i.e. bigger than 360), then the trigger offset number would be 570-720= -150°.

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