Help 99 Blazer wont fire.

[KLG]

Hello, I am a first time user of this sight so please forgive me if I am using the wrong forum. I found this question and am having a similar problem with my 99 Blazer. I bought the Blazer with a bad knock but the engine did run. I put in a new engine 4.3 and now it turns over and cranks but has no fire out of the coil. I am not very good with electrical so please be specific. I have put in a new cap, rotor, coil, and crank sensor. I verified the distributor was in correctly at the number six mark on the distributor which is at the #1 firing point. The wiring which goes into the ignition module- pink fuse output has power as does the wht/blk ignition coil driver. The two small wires which come out of the coil have power but there is no spark coiming out of the coil tower. I am at a loss. Please Help! Also does anyone have a schematic for the ignition system. Thanks

 

[496truck]

I verified the distributor was in correctly at the number six mark on the distributor which is at the #1 firing point.

I don't like the sound of that.

Do you know how to check for cyl 1 at TDC (top dead center)? Find that, then pull the dist cap and make sure the rotor is pointing to the terminal that the cyl #1 plug wire is going to.

But before that. Are you sure there is spark to the plugs when cranking? Are you sure fuel is getting to the spider (injector unit)?

 

[dhcomp]

How are you checking for spark? I am leary of the "no spark at coil tower" statement.

 

[rugged71]

Might check that the wires are in correct order on the distributer cap, the corect firing order