I was checking the timing on my 89 t2 yesterday and L1,L2 and T1 were all firing on the same mark on the crank and T2 was off god knows where. Someone tell me that this is messed up... The haynes manual had two different points for L1, T1.

L1 and L2 should be firing at the same time. T1 should fire about 15 degrees later at idle. T2 is after that...I think.

the 2 leading sparks fire at the same time? but the rotors aren't aligned....so why is the spark?

i hate this car already

Is it running like **** or something?

The leading sparks fire at the same time, but in fact when L1 needs to be fired the spark on L2 has no effect since there's nothing to fire. L2 needs to fire 180 degrees later so it's easier and cheaper to fire both leading plugs every 180 degrees instead of using 2 independent coils to fire each plug every 360 degrees.



For the trailing sparks, since it's about 15 deg. later if you fire the second trailing plug at the same time you would now fire the air/fuel mixture but at the wrong time (too much early). So you need 2 independent coil for the trailing sparks (180 degrees between T1 and T2).

Damn, that actually makes sense.



Thanks

I just hope that EvilT2 will need more serious problems before giving up. https://www.nopistons.com/forums/pub...#>/biggrin.png

I've been trying to find the power loss problem on mine for a long time and changed almost every sensors and external parts and still looking to solve it. But one thing is positive now, I know how it works. https://www.nopistons.com/forums/pub...#>/biggrin.png

Just when I thought "Oh OH! I know why I know why!" someones gotta steal my thunder! https://www.nopistons.com/forums/pub...#>/biggrin.png



Good explination

first mark green for l1 t1 is yellow all you worry about is l1 anyway.

unpug both your trailing wires while its running and you wont see much diff.

trailing edge helps clean up remaining gasses.

Also the T1 and T2 fire much more often than L1 and L2 So when attaching a timing light they look like they are firing more often... that is normal.

Are you sure you're not mistaking the trailing for the leading. The leading is firing every 180 degrees and the trailing every 360 degrees. Because the leading uses the same coil for both plugs, so the plugs are fired twice more.

I just hope that EvilT2 will need more serious problems before giving up. https://www.nopistons.com/forums/pub...#>/biggrin.png

I've been trying to find the power loss problem on mine for a long time and changed almost every sensors and external parts and still looking to solve it. But one thing is positive now, I know how it works. https://www.nopistons.com/forums/pub...#>/biggrin.png

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Ah, well now my turbo has gone out... hows that for a little more serious? Oh well, just means ill have to put in something else.