3.0L 93' Dodge Caravan, Spark to no spark pls help!!

I have a 93 dodge caravan with the 3.0 v6 engine, im having a problem finding out why i have a spark to my lead distributor wire from the coil pack one moment (though the spark is orange and i have heard that its supposed to be blue but none the less it was a strong spark) to having no spark at all, and to have a spark again, now i dont have spark again, and i need to know what can cause a spark to become intermittent, i been trying to trace down leads with a voltage meter but cant figure it out, ill just be driving around, and all of a sudden it will die, but start right up again, and like now sometimes it doesnt want to spark up at all, it works when it wants, can a coil pack be intermittent? The van runs well when i do have a spark never studdering or sputtering runs like new, and when it loses spark it just quits smooth, no indication that its going to wuit on me, right now its just cranking over and over with no spark, Pls!! help i would very much apreciate it...Thank you! The van has 170,000 miles with no other problems, right before this happened i changed the oil and oil filter, i checked all the wire harnesses as they run from the bottom of the distributor to the left along the bottom of the engine past the oil filter and starter and trans to the lead on the battery to the right. Any suggestions?

Going out on a limb because I know little about the second generation vans. Some of this is based on thrird generation info but probably applies. I would suspect your loosing the camshaft or crankshaft signal. When this happens power is cut to the ignition coil, fuel injectors, O2 senosrs and fuel pump via the automatic shutdown relay (ASD). The engine will crank all day, just won't start. I believe on your van the cam sensor is in the distributor. The crank sensor is on the transmission bell housing. Check connections for corrosion and contact damage. Check for reference voltage at each sensor. I wouldn't change anything based on this info unless you can verify it in a manual. Hope for better knowledge to chime in.

My van does not have the cam sensor nor a crankshaft sensor, it does have the auto shut down relay you were talkin about that if i have no ignition (distributor) signal when the key is in the on position, it does imterrupt power to the electric fuel pump, the fuel injectors, the ignition coil. This is the info i have on this mini van, it is a 3.0L V6 engine with a Multi-Point EFI system, I also know it has a SMEC single module engine controller or SBEC Single board engine controller book does not specify which one it has, but the SMEC/SBEC recieves variable voltage inputs from a variety of sensors, switches, and relays. All inputs are converted into digital signals which are read by the SMEC/SBEC, which constantly fine tunes such variables such as ignition timing, spark advance, ignition coil dwell, fuel injector pulse width, and idle speed to minimize exhaust emissions and enhance driveability. Also there is no cam sensor in my distibutor, but there is a Photo-Optical Sensing Unit. So i guess the question is still the same with the additional info ive come up on, what would cause me to have an intermittent spark, when the van ran it ran like a champ, no studdering, stumbling, or anything it would die every now and then but start right back up, in about 4 months it probally stalled 2 times and never gave me any indication that is was going to , i know its not getting spark from the coil pack to the distibutor, when i dont have a spark, i have done some voltage testing and i cant figure it out, the coil pack is good the lead wire to the distributor is good, if anyone can help i really would appreciate it very very much, i have medical problems and need this van, i would like to thank you RIP for the info you gave me which helped me stumble onto the extra info that i found, unfortunetly it just got my hopes up lol, but good try, thanks again.

Uh boy. My limb broke. Well you've sure got a better handle on this than I do. You're saying you're not getting power out of the coil at times. Only other thing I can confuse the issue with is on 3rd and 4th gen vans, coil power is supplied by the PCM (the engine control unit). It powers the coil pack with a single B+ power input. The PCMs coil driver circuits, one for each of the three coils in the pack then cycle each coils ground on and off to fire a coil. Their outputs can be tested using a test light. All should blink as the engine turns over. The B+ power can be checked using a meter. All of this is checked at the 4 contact coil connector. Anything similar on the 2nd gen vans? I'm assuming the SMEC/SBEC powers the coil on your van. Is there a similar test to check for it's power ouput to the coil? Maybe you've already been there.

Good god I just saw your question. Yes, a coil pack can heat up fail, cool off and fire. I've seen it once. I've read about it on forums several times. Time to hit the sack!

If you don't get an answer here try www.Chryslerminivan.net or www.dodgeforum.com

MANY EDITS ADDING INFO