I have a 1990 Dodge Colt, was running fine when sudden engine cut off.
Tested... no spark, no 12 volts to Spark Coil
What is the next test ?
Replace fuse or relay.
Check out the battery supply and then check the ignition coil and also the spark distributor....
I think you aught to be looking at the starter motor itself, the car cranks fine but doesn't fire up by the sounds of it, also check the spark plugs themselvesas, one or more of them may have become degraded or just caked in oil.
If its a diesel car check the glow plugs for continuity (these are just like spark plugs but are connected together with a heavy duty cable)
Regards
this is what the starter motor looks like
sometimes tapping on these with a hammer gets them going again but eventually needs repalcing.
This is what Glow plugs look like (if your car is diesel) 
The wire that connects to all the plugs may be degraded or a plug itself may have burnt out
regards
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There is a ground wire tuched to the car body,, check that wire is in place,
note -
1. without that wire there is no importance of your battery power (12 volt).
2. wire colore is green.
Thanks
The battery may be damaged and try to replace it and try.try to check whether there is any broken cables or not.thank you
What about alternator. It might be dead.
Distributor cap. It might be worn,damaged
What about jump starting. Does it help.
Also what about timing belt.
Good Luck
Your power supply goes straight from ignition switch check this also if you have the 1.6 engine possible cause would be the power transistor
possibly the hall effect switch in distributor. you would have 12volts on one side.Is this car a colt or colt vista?or wagon??
yes it is in the distributor. they can give some problems.looking at the diagram coil gets its 12volt from power transistor 
Connect the positive lead of an ohmmeter to terminal # 2, and the negative lead of the ohmmeter to terminal # 3. Continuity should NOT exist.
Connect the positive lead of a 1.5 volt battery to terminal # 1 and the negative lead of the battery to terminal # 2. Continuity should exist, while the battery is connected.
be sure to disconnect connector to transistor when doing this test.
this is how to check power transistor
this is not on the coil it is the power transistor should be on intake
STARTER?GL;OW PLUGS? WTF?????
I have given you info on a colt.the info i have given is for the 1.5 as you say you have smaller engine. The power transistor is located close to coil check this
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12 volts is supplied by the ignition switch, test the switch and make sure it is working correctly, pay attention to the wire colors and whether or not u have a resistive wire to the coil from the ignition switch..
There is no realy or fuse, that is incorrect.
what is the voltage at the + side of the coil connector, coil connector disconnected, u must disconnect, if the coil is defective u can show no volts.
What do u mean coil has continuity on 12 volt side, it does have 12 volts from the ignition?
U have to trace that 12 volt lead back to the ignition switch, that is where the problem is, the wire to the coil may be the same color as it is at the coil, I did this kind of work 20 years and that is how I would approach the problem, Japanese ignition switch's are famous for just this kind of problem, only 2 companies make switch's for Japanese cars so they pretty much share the same problems.
does the check engine light work?
The black wire is not the common, it is the secondary of the coil, it is what is switched to cause the coil to produce a spark.
Why do u want to test the hall effect sensor? if no power to the coil is the problem, u are really confusing us here, do the coil have power??
My friend give it a rest, request a refund from Fixya and take it to a shop.
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sometimes tapping on these with a hammer gets them going again but eventually needs repalcing.
this is how to check power transistor
Where is the relay and fuse you are talking about ? I checked visiably all the fuses on the pass side (under the hood) fuse block and those looked ok. Whats next ?
I believe it is the smaller of the engines... spark coil is square, appears good. When I connected 12v to the coil and cranked the engine it still would not start, however did not check for spark (darn)
Coil has continuity on 12v side anyway.
power from ign switch had everything else on when in the "run" position. I disconnected the coil at the coil connector / harness. no 12 volts when switch on, tested with meter at the harness female connector.
no, I do not have 12 volts from the wiring harness to the coil
Alternator is ok. Was driving on the road about 45 mph when engine cut off suddenly.
there were 2 wires going to the coil from the wireing harness... one was black, the other I will have to check. I assume the black is common and the other is +12VDC. So, if I supply 12v to the coil via cheater wires, the coil should spark when cranked ?
There is a computer in this car that was replace a few years back.... does the power come from there ?
this is the small 4 seat sedan. is the Hall effect sensor wires at the bottom of the distributor housing ?.. there are some wires going in there.
Car battery is fine, cranks engine normally.
the only wires I saw coming out of the square coil were 2, on a connector and of course the spark wire to the distributor.
How can I test the Hall effect sensor in the Distributor ? 12/11/08 10:38 E
Battery is good
This is a Colt, NOT a Vista Wagon
check under distributor cap. make sure the rotor contacts are NOT corroded severely or burnt off. this is called the rotor button, and if its wears off, it could cause that. also could likely be the pcm as that's what controls the signal to coil. make sure all is plugged in and tight. check around distributor and make sure connectors are not burnt through.
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