no spark in cold temps

[jakec]

does anyone have an idea about why i dont have any fire from my coil wire when the outside temp is below 50 degrees? when its warm outside it fires right up and if i can get it to start when its cold outside it runs great. it gets fire for a split second when i turn the key back from trying to start it but usually not long enough to start. i replaced the lock cylinder and all the plugs, wires,cap, and rotor button and it didnt help.

 

[83-cj-7=383-stroker]

have u checked to make sure u have fuel pressure when it does this ?

 

[54cj3b]

some coils do go bad with the cold , going from warm to cold causes the oil inside to expand cracking the inner section of the cell in the coil ,causing no spark issue

 

[jakec]

no i havent checked the fuel pressure but it does get fuel i can smell it and i looked in the carb and it was wet with gas right after i tried to start it. im gonna replace the coil just to be sure. its a msd blaster 2 but its kinda old.

 

[jleland]

My 91 did the same thing. I bought a stronger battery and it fixed the problem

 

[jakec]

i guess i havent thought to check the battery cause its just over a year old and its a 1000 cca but im willing to try anything.

 

[jakec]

well i changed the ignition switch and three hours later it still wont start. i guess the ignition control module is next.

 

[jakec]

does anybody know a way to check the icm to see if its bad? i hate to change it for nothing.

 

[jakec]

finally changed the ignition control module and thats what the problem was. starts every time now.