spark plug was also replaced. looking for the required voltage for the plug to fire. Also which wire on ign control mod. controls ign. coil.spark plug was also replaced. looking for the required voltage for the plug to fire. Also which wire on ign control mod. controls ign. coil.
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There is a grounding wire that runs from the negative side of the battery to the engine block that has been known to break at the spade lug where it connects to the engine block. It is connected on the block on the side of the engine opposite the door, so you have to remove the whole red shell cover to get to it to fix it. Without having the engine grounded, you will not get a spark. You can easily test to see if that is broken by connecting a wire from the ground terminal (on the side opposite the door) to the engine block. I used one of my jumper cables and just clipped one end to the terminal and the other to one of the bolts that I could get to inside the door. I have seen this on a couple different ones. I went crazy the first time... went as far as replacing the oil sensor figuring that was grounding the ignition..and it was this stupid ground wire. Finally fixed it for good with one of those $5 braided ground straps that you get at Autozone and went from the frame to the side of the engine.
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Check the switch on /off is not faulty try taking the wire off the switch that goes to the motor mine had that problem (lot of dodgy switches fitted to them ,make sure the choke is closing on fully.check spark plug not fouled up with carbon.
Sorry but they either work or they dont.
If yours isn't working, replace it.
But before you replce it consider checking the other components, because ign mods are exspensive.
it sounds like you've been already checking the other stuff. heres what i'd check if your bike came to my shop.
1. battery fully charged, and can take a load. (weak batteries = weak ign power)
i have a bike that won't fire at all with weak battery. Make sure battery is good.
2. check for spark at plugs, make sure plugs are good. Pull plugs and turn motor over.
rest plug next to head and turn over, do not touch the plug while turning over
or you can be shocked.look for spark.
if you have spark , then you ign mod is working.
if no spark, then check #3
3. power to coils. check the power going into coils,
if power but no spark, then coil is bad.
if no power. check #4
4. power to coils comes from a ignition system ( points/ cdi /ign. module)
there is a stator and a rotor. and a signal generator. on your motor
the signal generator wire sends a signal to the cdi, every time the rotor rotates.
the ignition system (ign.mod) sends power to coil.
so if no signal to the cdi, then signal generator is bad
if signal going into cdi but not sending the power to the coils then the cdi/ ign. mod is bad.
the air fuel control mod can cause the prob you are having 1990 to 2000 ford rangers are bad about doing what yours is doing and it is always that air fuel mod
spark plug was also replaced. looking for the required voltage for the plug to fire. Also which wire on ign control mod. controls ign. coil.
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