S_Mazza
Registered User
My car has been suffering from part-throttle ping. I wanted to verify that the timing is correct before I invest in tuning, so today I dug out the timing light and checked it out. I checked the timing two ways, once with the plastic cover off and reading the marks on the balancer, and once with the cover on and comparing the notch on the crank pulley to the marks on the cover.
When reading the marks on the balancer, the timing seemed to jump around in a range from 10 to 15 BTC. That seemed reasonably correct, so I put the cover and crank pulley back on. I realized after the fact that I should have pulled the SPOUT to verify the timing was locked at 10 BTC. But I pulled the SPOUT for the next part.
Now, I found the notch in the rim of the crank pulley and highlighted it with paint. I pulled out the SPOUT plug. That locked the timing right down so it didn't move at all.
Now, here is where I am confused. At each flash, the notch lined up with the 10 degrees BTC mark on the plastic cover. That sounds good, BUT ... When I looked at the notch in the crank pulley, it seemed to me like that notch approximately lines up with the notch in the rim of the balancer. Wouldn't that equal 26 ATC?
Did I just misjudge the relative position of the two notches?
Or is the plastic cover's mark for TDC offset from the pointer on the block?
Or is my timing wrong?
When reading the marks on the balancer, the timing seemed to jump around in a range from 10 to 15 BTC. That seemed reasonably correct, so I put the cover and crank pulley back on. I realized after the fact that I should have pulled the SPOUT to verify the timing was locked at 10 BTC. But I pulled the SPOUT for the next part.
Now, I found the notch in the rim of the crank pulley and highlighted it with paint. I pulled out the SPOUT plug. That locked the timing right down so it didn't move at all.
Now, here is where I am confused. At each flash, the notch lined up with the 10 degrees BTC mark on the plastic cover. That sounds good, BUT ... When I looked at the notch in the crank pulley, it seemed to me like that notch approximately lines up with the notch in the rim of the balancer. Wouldn't that equal 26 ATC?
Did I just misjudge the relative position of the two notches?
Or is the plastic cover's mark for TDC offset from the pointer on the block?
Or is my timing wrong?