It is electronic
could be a faulty coil /wiring
not the chain or it would not be running at all
I would be looking at an incorrect coil or igniter in the distributor
coils come in 2 types
12 volts start and 7.5 v run or straight 12 volts
if you run a 7.5 volt coil without the resistance wire or resistance block , it will overheat the coil and it will break down , missing or hard to start or no start at all
SOURCE: diagram for replacing distributor, cap, rotor...
Replace the coil. It is shorted out. I have changed quite a few coils for the exact same symptom.
The graciousness of a FixYa rating for my assistance would be appreciated.
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SOURCE: ROTOR BURNING UP
The rotor is somehow making direct contact with one or more distributor contacts.
Check the contacts inthe cap to see if you find any physical damage to one or more contacts caused by the rotor.
Could be rotor lead too long (file it down) or maybe the distributor shaft is bent or not seated. Remove cap and observe the distributor shaft as someone cranks the engine. Does it wobble? Can't tell? Place a stiff reference parallel to the shaft and turn engine again.
SOURCE: 97 dodge ram no spark
then i would replace whats called the hall effect sensor its that black plastic plate you see when you take dist cap off. just pull rotor and lift up the sensor.dist cap is what holds it on.also under the sensor will be a stamped sheet metal piece that looks like the top of a castle wall. make sure its not loose on the shaft.if it is then new dist will be needed
SOURCE: Hello, My 1981 Toyota truck
The fault seems evident to be within the carburetor. I think you might have to start from the fuel tank to check if there are impurities present in the tank, if you see the fuel filter dirty or clogged with fine dirt.
In this case clean the tank and change the filter.
Now the possible problem can be the carburetor is blocked on the ports , or the idling valve/jet is blocked.
hence I recommend a full overhauling of the carburetor so that the fuel flow /pressure to the idling is adequate. Clean all porrts/jets as you reset---- please take care to attempt this job using proper tools and torque when removing and resetting.
Once done please check the fuel pump also, crank the engine and take the fuel flow into a bottle to check for impurities.
Now set back ,start the engine and tuning up the air/fuel mixture. Allow the engine to rev up to about 1500RPM while you set the mixture to have the engine running smooth. Now trim down the idle setting of the throttle to reduce to the desired level.
Please make sure the timing is set correct.
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