I replaced the relays and still no spark how do i test the igniton coil

The spark plugs that are not sparking will be the most likely reason for the loss of power. You will need to find out why they are not sparking.
Start from the spark plugs. Check the condition and age of the spark plugs. If in doubt replace them all. Do the same for the plug leads attached to the plugs. Next you will have to check the igniton coils. On you vehicle i think the plug leads and ignition coils are all one piece. Get a good mechanic or an auto electrician to test the coils to make sure they are working correctly..

check battery connections at battery and starter ends. Check fuel filter, fuel pump relay, or maybe fuel pump is too weak to run engine at speed or under load. Can be coil or igniton module, map sensor, crank/camshaft sensors. Your description is pretty generic, so it possibly could be one of those "search till you find it" type repairs. Keep this in mind: In order for an engine to run it must have three things. Fuel, air, and spark. Air is easy to get. Fuel problems could only be the relay, pump, fuse, injectors. Spark is more hard to get, as you also need spark at the right time. So check igniton last, it gets real costly as you go. Coil, ignition module, any and all sensors ect.

try the auto shutoff relay.. it controls the fuel pump and the igniton circuits..

Hi Glen, If the problem persists after replacing the coil I believe you must look at the cables for an internal broken circuit. Also check the ground connection. If all else fails check the computer. Regards John

the igniton control module in the distributer control the spark take it off and take to advance or auto zone thay will test it for free

I have replaced many crank sensors that tested good but would intermittantly fail while running

Integrated ignition coil on plug

Ignition coil F is cylinder number 6 need to check or replace
Spark plug or coil,

Very rare you have to check PCM pin E39 to see if you have a short in the wire.

check to make sure the security light is not on if it is the van will have spark but no injecter pulse the best way to solve this issue is to have the original igniton key and put it in the igniton in the run position and leave it on for 10 minutes then the light will flash then try to start the van

If it's getting fire to coil then it would be either distributor cap / rotor, bad coil or plugs or wires.
Take off cap first, look for cracks, look at rotor for signs of corosion or being burnt, next look for cracked plug wires, finally take coil to auto part store and have it tested.

Check with a DC volt meter or test light to make sure that the coil is getting proper voltage when the ignition is switched on. You can also OHM out the coil to see if it is burnt open or shorted out.