1998 chevy express van wont start . no spark. replaced distributor, rotor cap, ignition module, crank sensor, and coil. fuel pump is working

Check the ground connections on the ECU computer.

If the ignition coil, crank sensor,ignition ,module ,cap and rotor are new then possibly a bad pick up coil inside the distributor bad ignition coil wire from dist. to coil or missing power supply

Tps has nothing to do with sparks. If you had sparks going to the distrubuter but none coming out, the cap or rotor is not installed correctly.

First does the rotor turn when cranking engine?? possible timing chain is out or stripped gear..are you sure it has no spark??did you verify this with a high output spark tester ? did you spray starting fluid in the tbi unit ?

Do you have a little screw driver? there is a fuel pressure test port take the cap out now be carefull when you do this crank it and at the same time press the shrader does gas come out like alotnot just a little but alot if it does then the fuel pump works now if it dribbles then your fuel pump failed,Okay if the fuel pump works the only thing that is left is the coil and ignition control module, before you decide to do the module or the coil the number on reason for it not to start is connection to the coil I see this all the time go to the coil connection and have some one crank it while you wiggle it and see if it start then.now if it still doesnt start youll just have to test for spark and if there is no spark your best solution is to replace the whole distributor why because there is a relector that has always failed even when it gives spark. and fuel because as a timed unit it gave fuel and spark at the wrong time here use the picture included in #1 wiggle connection #2 check for spark

Start with fuel system. Listen for fuel pump humm at fuel tank No humm check wiring to pump for power. Then check for spark at plugs and wires. Remove wire from coil and hold near engine and see arch when you crank. No arch. Replace ignition Modular inside distributor cap or cap or rotor

try setting the distributor even tho they are controlled by a computer and spark is advanced or retared by the computer if they get 10 degrees or more out of time they cant correct it and start hard or a no start issue. Turn the engine to top dead center on 1. I figured out that the notch on dampener lines up with notch on the block. mark the direction the rotor is facing and when you put the cap on, adjusted the distributor so that the #1 terminal is dead on with the rotor (follow the raised area on the cap from the #1 plug wire and this will let you see where the #1 terminal lines up). one other thing it could also be is the module on the distributor but if you have spark it shouldnt be that

Check your rotor, distributor cap, coil wire.did you change the module inside the distributor cap.

Check for broken timing belt. Put a screew into spark plug head put the other end close but not touching to a metal engine part. have some one check for spark while you turn over engine. if thei is no spark check with distributor cap off if the rotor rotates when engine is being tuned over. if not then check timing chain. Good luck.

. Make sure that the distributor rotor is moving when it cranks. check the cap and rotor for cranks. If all is well then change your module inside your distributor.