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Check for continuity on the ignition module kill wire to engine block. Without the oil sentry there should be a single black wire from the ignition module to the ignition switch. This wire goes to the ignition switch and when in the OFF position connects to engine frame to disable spark.
You could disconnect the kill wire at the ignition module and then check for spark. If spark then the kill wire or switch is connected to block (short) or bad switch.
It is very common on ALL SATURN S series vehicle for ignition module failure. Usually the symptons are running rough and possibly a check engine light with misfire codes-P0300,P0301,P0302,P0303,P0304.
Some people have attampted replacing plugs and wires,even coils and continually have the problem reoccuring. What happens is the ignition module bolts(x4) stretch out through time and corrosion builds up underneath the module causing incorrect spark displacement. In turn this damages the plug wires and even at times the plugs. What needs to be done is replacing plug wires, plugs if needed, the ignition module bolts(saturn dealer item only)and the ignition module-NOT JUST THE COILS.
This should fix your problem.
Take each plug out of the head. ( 1 AT A TIME ONLY ) and have assistant turn over engine while you look at the plug. No spark = bad module. Or while engine is running plug plug wire from the plug ( 1 at a time ) a good working plug/ module will cause engine to running crappy when wire is removed. If you pull the plug wire on a plug that has a bad module the engine will not change in sound or idle. That's your bad plug/module. That's for engines with module/coil per cylinder. For engine with 1 module for all cylinders use a volt/ohm meter at the module . You will need to know the required ohm/resistance to know if it needs replacement .
The power output stage hi and low (basically the ignition module) this is what powers the coil and can cause misfiring if not working properly.
This is located by the computer (e-box) it has 4 plugs, 2 on one side and 2 on the other.
Other possible issue for misfire are:
loss of compression
bad injectors
electrical problems
bad ECU
OK, lets back up. How are you testing for spark? Do you have an inline spark tester? If not, go get one from your local auto supply house ($10) and come back. You back?
On the ignition module, set the gap to the flywheel using the thickness of a clean business card. Make sure the module is on "right side" up...one side of the module should say "cylinder". Disconnect the kill wire from the spade connector on the module. Reassemble enough to spin the motor at least 250 rpms and check for spark with your inline spark tester. Spark? If no, then you either have a bad module (likely) or a bad flywheel (rare). If yes, reconnect the kill wire and retest. Spark? If no, trace the wire back to the switch. The switch will have a cable that activates the switch and connects to the upper handle. If the cable is binding or has stretched, it will not move the switch far enough to activate. If the cable is moving less than 1/2 inch, then it is damaged and must be replaced. If the switch is moving enough, trace the wire from the switch to the module and look for open/exposed spots in the wire that may be grounding out against the engine or frame.
Good luck.
sounds like it could be a bad ignition module
this is what supplies spark to the spark plugs-it is very common on the s series saturns-the bolts that mount it through time stretch out and moisture gathers underneath the module which in turn causes corrosion-then starts to restrict proper spark to the plugs-if the code pulled is a cylinder misfire code(p0300,p0301,p0302,p0303,p0304)i would suggest replacing the module,plugs,wires, and the mounting bolts.
many have tried replacing just coils and usually ends up coming back or not solving problem at all.
check the plug wires-it is also possible the coils may be getting power and not putting spark out-the saturns are very common for ignition modules going bad(this is what the coils set inside of)-what happens is the 4 bolts that seccure the module stretch out and corrosion collects underneath the module causing it to go bad-you may need to replace the wires-ignition module-and bolts
In the 2.2 they are under the top coil assembly,
which is a long plastic peice with the igniton module on the right end with wiring connector hooked in it.
take the 4 10mm bolts loose from the top and the 10mm bolt holding the cable on the right side of the engine head and carefully unplug the wiring connector on the module. this will let you lift the coils assembly
out after removing the 4 bolts. the coil assembly is pressed into the rubbers which will need to be pulled out after coil assembly removal. the spark plugs will be in the holes. Use a 6 inch 3/8 drive extesion with 5/8 inch spark plug socket. after loosening the spark
plugs if they don't come out with the socket use a stick mechanics magnet to remove, it will pull on the metal on the end of the spark plug while you gently
pull them up. this will save you time if they drop into
the hole. make sure they are completely loose.
when you put he new sparks plugs in after gaping them to specs put the long rubber in each hole,
push with your thumb smartly to seat on the plug,
you will feel a slight click, then put the coil assembly
on and push smartly not to crack it then keep it level as you put the 10mm bolts in. put all the bolts in a few turns before tightening them one at a time.
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