Check the wire from the solenoid to the coil. Should be a red wire with a stripe on the second small terminal of the solenoid.
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What am I looking for Jeff
Is the wire on the correct terminal of the solenoid? Is it connected to the coil positive terminal? Is the wire possibly broken under the insulation?
there is a small relay (I think it's a relay) mounted on the right fender with a red/white stripe wire (with black ground wire attached) any ways it is corroded, but I don't know what it is, but the wire is red/white stripe
There should not be a ground wire attached. That wire is to power your coil while the engine is cranking. The relay is actually your starter solenoid, as seen on the diagram above.
while cranking I have power to the coil, I read this but don't understand the abreviations, I had one power supply wire to the muc. that had lost its feed from the battery preventing power the the dist. from the muc. Once I supplied power to the red wire in the bulk head connector #72 the jeep started on first crank. There is two (2) battery feeds to the muc. and I had lost one of them to a broken wire in the dash near the bulk head connector.
I don't understand that either--don't know what they mean by "muc." So you have power to the coil but no sparks. You only get sparks when you are just turning the ket to start and when you let off the key? Have you swapped out the ignition module in the distributor?
Yes to the turning of the key, but the dist. only has a pick-up coil and the ignition mod. is on the left rear fender
now I know the steering column is a chevy column (or just like one) it has the switch on the lower column, what do you think about that as the culpit
The way I discribe it is when the engine turns over the coil primary is grounding out
OK, if the pickup coil looks OK, I would suspect the module. If the coil is getting power when the key is turned to start, then so does the module. You should verify the red/white wire is getting power to the module. If not, it's the wire--not the ignition switch.
You do have a GM Saginaw column with the switch on the side, but I don't think that's the problem in this case.
Cool, I'll test that wire, yes on the column, I turned the key to the start position and tried starting it from the starter solinod, the results were the same, The possitive side of the coil gets brighter when trying to crank engine, alright i'm going to test it, thanks again. I'll let you know the results.
The coil normally runs on 9 volts, as the power from the run position of the key goes thru the ballast resistor. When the key is turned to start, you are getting a full 12 volts from the solenoid direct to the coil. That is why your test light is brighter.
well I have power to the ignitiom mod. something is leading me back to the pick up coil, I am getting info from a proff. michells repair, hell he pays good money to get the latest update, it has all the test proceedures, this jeep has me ******, I WIN Always,
If you have the spec for the pick up coil and an ohmmeter, I would check it. Because the current there is minimal, they do not usually fail unless there is an accidental power source applied. My bet is on the module.
well it's alive, and you were right on, Ignition mod was bad, it was a new one, so after testing I went and replace it and varrrrrooooom
cool beans, have fun with it.
Thanks again.
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A jeep that cranks over but doesn't start, in many cases will be due to a bad fuel pump, a broken timing belt, an inoperative cam sensor or crank sensor. Also these problems are related to faulty spark plug. Check the spark at spark plugs when you start the jeep. Do you notice any spark. Actually you should see. If in case there is no spark then it's a spark plug problem. Also the coil pack gives power to spark plug. So check the voltage at coil pack. It will show 12 volt. If there is no voltage noticed at coil pack then its faulty coil pack that has to be replaced. If all the possible options checked out ok then check the jeep starter. The starter gets power from battery to start the jeep. If the starter is faulty then it will not let the jeep to start. Also check and confirm that there is fuel in the jeep. If its very low fuel then in some cases this causes the problem. Also check and confirm that fuel pump is functioning properly and the fuel filter is not clogged. One of the easiest ways to check for a fuel pump related problem is to spray a little starting fluid into the air intake while trying to start the jeep. If the jeep starts momentarily, then there's a good chance the fuel pump is not working or the jeep is out of gas. You can also listen for the fuel pump's humming sound when the key is first turned on. Also if a inoperative fuel pump is suspected, a good technician will always check to verify there is power and ground being supplied to the pump, to eliminate the possibility of a bad relay or electrical issue. Fuel pressure can be checked with a pressure gauge and if there is pressure, pulse can be checked at the fuel injectors in several ways including the most common, with the use of noid lights. If the injectors don't have pulse the engine won't start. ---------- This troubleshooting tips will help you to solve the problem. Thanks. Helpmech.
If your engine cranks normally but will
not start because it has no spark, or it stalls and won't restart because it
has no spark.
You can also do a test to confirm the
problem .The procedure to do the test is as follows:--- If your
engine has spark plug wires, disconnect one of the plug wires from a spark plug
and place the end of the wire near a metal surface on the engine. Then insert a
small Phillips screwdriver into the end of the wire (the plug boot), or a small
bolt or nail to provide a conductive path. Then crank the engine and look for a
spark to jump from the screwdriver, bolt or nail in the end of the plug wire to
the engine. If you do not see a spark, there is an ignition problem. OR----------- If your engine has a
coil-on-plug ignition system with no plug wires, In that case remove one
of the coils from the spark plug and insert an old spark plug, a spark plug
tester or a screwdriver into the end of the coil. Ground the spark plug or plug
tester to the engine, then crank the engine and look for a spark. No spark
indicates an ignition problem.If the engine has no spark, check for
voltage at the coil positive terminal when the ignition key is on. If NO
voltage, then problem is on the trigger side of the coil (pickup, crank sensor,
ignition module or primary wiring circuit).
But If there is NO voltage at the coil
itself, then in that case the problem is on the supply side (the ignition
switch or ignition wiring circuit).-----------------
Jeep cranks but no start:---------------- A jeep that cranks over but doesn't start, in many cases will be
due to a bad fuel pump, a broken timing belt, an inoperative cam sensor or
crank sensor. Also these problems are related to faulty spark plug. Check the
spark at spark plugs when you start the jeep. Do you notice any spark. Actually
you should see. If in case there is no spark then it's a spark plug problem.
Also the coil pack gives power to spark plug. So check the voltage at coil
pack. It will show 12 volt. If there is no voltage noticed at coil pack then
its faulty coil pack that has to be replaced. If all the possible options
checked out ok then check the car starter. The starter gets power from battery
to start the jeep. If the starter is faulty then it will not let the car to
start. Also check and confirm that there is fuel in the jeep. If its very low
fuel then in some cases this causes the problem. Also check and confirm that
fuel pump is functioning properly and the fuel filter is not clogged. One of
the easiest ways to check for a fuel pump related problem is to spray a little
starting fluid into the air intake while trying to start the jeep. If the car
starts momentarily, then there's a good chance the fuel pump is not working or
the jeep is out of gas. You can also listen for the fuel pump's humming sound
when the key is first turned on. Also if a inoperative fuel pump is suspected,
a good technician will always check to verify there is power and ground being
supplied to the pump, to eliminate the possibility of a bad relay or electrical
issue. Fuel pressure can be checked with a pressure gauge and if there is
pressure, pulse can be checked at the fuel injectors in several ways including
the most common, with the use of noid lights. If the injectors don't have pulse
the engine won't start. ---------- This troubleshooting tips will help you to solve the problem. Thanks.
Helpmech.
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