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Ignition parts #s for Chrysler 251

Snowtrac Nome

member formerly known as dds
GOLD Site Supporter
un like points, if he has weak spark I wouldn't blame the electronic unit. he should be getting proper coil saturation. I would suggest looking at cap rotor and wires if all are good, it's likely he has a bad coil ,and should replace it with one intended for electronic ignition. also what is voltage input to the coil is it the full 12 volts there may be a resister some place causing a problem.
 

cdog

Member
I used the coil from pertronix..no resistor.
I also tried the original coil.
I have full voltage at the coil....also enough when cranking.
I have relpaced cap rotor button and wires as well.
 

krustyman

New member
I know this is an old thread but thought I would add my tidbits. I have a JW74 with the 251 and it has a Prestolite IAY4104A. The online catalogue for SMP is really only for new vehicles but if you call their support number they are able to provide part numbers for all the old good stuff. My distributor SMP part numbers are:

al4556xp
al118x
al151
al138
2603W
 
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