I have great!! spark at the coil but at the plugs i can barely see it at night. i have recently pulled the heads and had the rebuilt the heads and had a valve job done while i reseal the injection unit. i have had it apart before when it blew the intake gaskets and put it back together and it ran just fine. This time i can not for the life of me figure this out. It has new coil, dist, rotor, cap, wires, and plugs. All parts are from the dealer. i have timed it a good 12 times, rotor points right a the indicator, i've inspected all the parts and check for cracks or burn marks and corrosion. Compression test was perfect. fuel pump holds 65-60psi during cranking.

 

What brand parts did you use for the wires, plugs, cap and rotor?

 

All the parts are GM parts from the dealership..

 

Timing is not adjustable, what did you do? Is P1345 in memory after attempting to start it? Does the engine backfire while cranking?

 

Mine wouldn't start after I did.mine too. Until captain hook(I think) told me how to set to tdc and fix the timing. It took me 2 or 3 tries to set it properly and I still have the timing code. So I would try it again, cant hurt anything and doesn't take long, but I'm not as knowledgeable about this as captain hook, so anything he tells you I would listen to. If you search aaround about setting the timing you'll probably see most of the advice from him.

 

I've made the mistake of using the wrong timing mark on the harmonic balancer while setting the timing.
The balancer has two grooves. Make sure to use the second timing mark as to tdc when rotating the crankshaft so #1 is on the compression stroke. Then set the distributor into position so the rotor ends up pointing to the #6 on the distributor. The rotor should be pointing between #2 & #4 cylinders. As you know you must use a long screw driver to rotate the oil pump shaft so the distributor gear will mate properly and fully seat.
All this being true if the balancer is good and the outer portion of the balanced has not spun.

 

Make sure you reattached all of your engine ground wires. There are several that are on back of the right cylinder head and use only two mounting points for a group of wires. It would be easy to miss one when you were putting it all back together. Let us know what you find!

 

I got it running this morning!! the out ring on the balance has shifted and moved the timing marks

 

Glad to hear you got things straight.