I went to time my car today i used the fsm and went step by step warmed car up grounded check connector. Hooked timing light up to L1 its dead on at degrees ATDC...then i hooked to T1 and dialed my timing light to 20 degrees...to my suprise its off i dialed down the timing light to see what the trailing is actually firing at and it is right around 5 degrees like the leading is. Yes, i double checked i was on the right wires and i know that the yellow on the pulley is the leading and the trailing should be red. What my question is how would you adjust trailing timing??? Or does the ecm control this, or maybe something might be wrong with one of the sensors??? Anyone, please help me figure this out. Stock car with no mods 91n/a.

 

Leave light on zero and check the timing on leading/trailing plugs. If, as you say they are both firing the same, the leading and trailing will be on the same mark yellow. Give it a try.

 

they're firing both the same degrees, not the same place on harmonic balancer. but i'll try what u said...

 

iv'e got to turn the dial of the timing light to about 5 degrees to get it to line up with the red mark on the pulley with the inductive clamp on T1, it is supposed to line up at with red mark at 20...just to clarify

 

is there any specific sensor that contols just trailing timing????

 

any help would be appreciated.......

 

can retarded trailing timing hurt anything??

 

At the yellow mark, it will line up with L1 with the timing gun set at 0.
At the red mark, it will line up with T1, with the timing gun set at 0.

This ONLY works if your idle is lower than ~950.

 

so set timing to 0 degrees?? both leading and trailing? yes my idle is about 750 rpm

 

Im A Little Confused On Why To Set Timing At 0 Degrees???

 

He's saying to set the TIMING LIGHT to zero, then set the L1 to yellow, then the trailing will line up with the red mark

 

The red mark represents 20 deg, just to make things clear.

 

Oh Oops, I Have A Dial On My Timing Light I Thought The Marks On The Pulley Were Zero Degrees Thus I Was Setting The Dial An Additional 5 And 20 Degrees For Each Mark....thats What I've Been Doing Wrong This Whole Time....thanks Guys Sorry To Make This So Complicated....