[DennisTA15]

From what I was told here was that timing can only be checked via a scan tool. Not just any scan tool, one that reads camshaft to crankshaft correlation. The home brew method I was told was to set at TDC, or in your case you marked every thing so everything should be close, then turn the distributor a little and start the truck. If the check engine light is still on, turn off (truck) and turn the distributor some more. Repeat until your check engine light is off. When your check engine light isn't on that means it's within spec (which is +/- 2degrees cam to crank correlation. You see the cam sensor is in the distributor, that's why half of the black round part under the rotor has a lip on the bottom of it. When the distributor gear wears out the computer reads the cam in a different position than it really is. You may have to disconnet you battery before you restart your truck to clear the check engine light (not sure though).

Here's a pic of my distributor before I pulled it out. Note: I didn't set mine at TDC before I pulled it. If you line the notch in your crank pulley with the tab on the block then your rotor should either point to #1 cylinder plug wire at the cap or #6 at the cap, depending upon the cycle of the piston.



Sorry I couldn't get back to you earlier (work). I hope this helps some.