'93 Blazer will not start, turns over, but no spark...

Could be your distributor cap/rotor and maybe spark plug wires. Does the engine turn over at all?

Have you checked to see if you have spark at the spark plug when the engine is rolling over?.

That is indeed odd. I would suspect problems with the hi tension cables if this was not part of the ones you changed since the flow of current ends at the distributor. Check also other cables such as the ground. It is puzzling that all plugs would not have any spark. I would also recommend a scanner used to check for error codes given out by the car's ECU.

Firing order for a 4.3 liter v6 1-6-5-4-3-2

#1 piston is the first spark plug drivers side front of engine.
Passenger side cylinders are 2 4 6
Drivers side cylinders are 1 3 5
Distributor rotates clockwise and the starting spot is marked with a 1 on the top of the distributor cap.
Make sure you note the position of the 1 on the old cap before you take it off so you don't rotate the new one 180 out

Hi,there is label number on spark plug wires.try to match the same number and replace one spark plug wire and one spark plug at the time!!!
good luck!!!!!!

Check for spark by removing one of the plug wires from a spark plug and installing one of your old plugs in the removed wire (leave the other end of the wire attached to the cap). Rest the exposed plug on an under-hood surface that will provide a sufficient ground and have some one turn over the engine. You should se a strong blue spark. We have seen some intermittent coil problems on your generation Blazer that would explain a lack of spark. Good luck!

1-6-5-4-3-2
heres a link to help you, good luck.
http://images.google.com/imgres?imgurl=http://www.2carpros.com/forum/automotive_pictures/170934_firing_order_1.jpg&imgrefurl=http://www.2carpros.com/forum/1998-chevy-blazer--spark-plug-wires-vt257725.html&usg=__mEuwyzlUpS9OE3hDhooTkWaPA7s=&h=260&w=278&sz=15&hl=en&start=1&um=1&tbnid=FCT3-hbHWraurM:&tbnh=107&tbnw=114&prev=/images%3Fq%3D1998%2Bchevy%2Bblazer%2Bfiring%2Border%26hl%3Den%26sa%3DN%26um%3D1

Start by checking each cylinder for spark with a good spark tester. A misifre is either spark or fuel, so you can cut the problem in half. The engine light is probably on due to the misfire.

There is a module in the ignition cap that is known to go bad. If it is this part, your truck will almost turn over, but not quite. I would check there first. Once you get it out, one of you local parts stores can test it.

the problem is common for the 93-94-95 4.3 vortex its the spider injection located inside the plenum the part costs between $250 to 400 i had to replace on girlfreinds 94 blazer. ifound one o ebay for $100