1993 chev pu hard to start,replaced fuelfilter,fuel pump,dist cap,rotor, and control module, and it still does the same, hard to start

If you are getting fire from the coil to the distributor but not out of the distributor, it could be caused by a few different issues. Here are a few things you can try to troubleshoot and fix the problem:

Check the spark plugs: Make sure that the spark plugs are properly installed and that they are not damaged or fouled.

Check the distributor cap and rotor: The distributor cap and rotor can wear out over time and may need to be replaced. Inspect them for any visible signs of damage or wear and replace if necessary.

Check the ignition wires: The ignition wires may be damaged or loose, causing a loss of spark. Check the wires for any visible signs of damage or loose connections and replace or tighten as needed.

Check the ignition control module: The ignition control module may be faulty, causing a loss of spark. Test the module to see if it is functioning properly or have it replaced if necessary.

Check the fuel system: A malfunctioning fuel system can prevent the engine from starting. Make sure that the fuel pump is working properly and that there is sufficient fuel in the tank.

Does it start right back up ?
Are you loosing spark to the plugs or fuel to the injectors ?

check for spark if there is no fuel coming out of injectors you can borrow noid lights from orielies auto parts check the injectors for pulse width if you have no pulse your computer is bad if vyou have no spark remove dist ributer cap and see if rotor turns while cranking if it does check for spark between coil and dist if no spark you more then likely have a bad ignition module

remove dist cap and rotor, under the rotor there is a control module (its about 1/4" tall, 1" wide, and 2-2 1/2" long) remove the module and take it to a parts store and have it tested. If its bad replace it and put dist back together and try starting it again. if thats not it then have coil check. Oh ya before you take anything apart disconect battery.

I would recomend replacing the ignition module located in the dist.cap.

check for spark at the plugs check firing order in correct direction on cap in relation to direction of dist rotation remove cap wind engine to see that distributor drive gear hasnt stripped a tooth if these are ok if its electronic dist the module could be faulty

ck cam interrupter inside dist cap ck coil make shore it firing and coil wire to

Find the pressure test port (looks like a tire valve) on the fuel distribution rail over the injectors and place a can over the open end of the valve. Press the inner pin to release fuel into the can. If the pressure seems to fall rapidly, replace the fuel filter. Is the check engine light on? Rent a scanner, read any code(s), and pursue to repair(s). A bad crankshaft sensor or camshaft sensor can prevent the injectors from firing fuel into the engine.

replace carbutator and get it profesional tunned

make sure that the right cap goes to the right plug. they are specific to firing order.