Random miss It has a random miss, replaced plugs, wires, distributor cap, and rotor button. Van still missing, need help.

What year? Does it have a distributor? If so, possible distributor cap/rotor issue. If coil over plug, you need to run a compression test to see if a cylinder is weak/valve issue

i would see if coil is crack even a hair line crack can cause hesitating under load if you cant see a crack wait till dark and look at it

is your distributor still using contact point? if yes, have it cleaned or replaced. also, replace the condenser attached in the distributor.

have you replaced also the distributor rotor?

remove your plugs and see if at least one contains oil.

Check the compression on each cylinder. Also check for proper valve operation. You may have a flat cam lobe or bad rocker arm on either the intake or exhaust side which will give the rough idle you are experiencing.

When it comes time to change the plugs and wires and distributor cap do the cap and rotor first. Remove the old cap with the wires still attached. Put the new cap and rotor on the distributor and transfer the old wires one at a time. Make sure both caps are lined up in regards to mounting position on the distributor. The cap will only mount one way. When you have this done then you can do the plugs and new wires, again one at a time. This way, when you are done the van should start right up and purr like a kitten. Hope this helps.

go back into the rotor cap and check it for carbon tracking, and check the rotor button for carbon/ melting, its possible the coil. make sure you have good fuel pressure and that it hasnt jumped time.

Replace your O2 Sensor and Spark Plug Wires. If you still have the Random Misfire, replace your Spark Plugs, then Replace your Distributor Cap and Rotor. If you still have the Random Misfire you may have a Timing Problem, or Ignition Coil problem.

I’m happy to help further over the phone at https://www.6ya.com/expert/jeremy_69f3cc28d95bf514

try changing out your throttle position sensor

Try the ignition module located under the cap inside the distributor

Hello, You may need to replace your spark plugs, plug wires, and if you have a v6 engine with a distributor you will need a distributor cap and a rotor button.Please rate this answer thank you.