hello, i hope im posting in the right spot...first time posting...anyway i have a 1994 dodge ram 2500 with the v-10. the problem is that when its cold outside like 34 degrees and lower the engine will not start. first i thought it was the fuel pump. so went and got one and replaced it. boom truck started right up (it was warmer outside then). next morning its cold again and wont start again. i checked for spark. there was none. so i went and bought a new camshaft sensor and a new crankshaft sensor. replaced them both and the truck started right up. again it was warmer outside by then. to make a long story short its still doing the same exact thing and wont start when its cold outside. once it finally does start it runs well. to me it seems like the pcm isnt receiving power when its cold outside. the only code is 12 coming up. which i dont understand that either because the battery hasnt been removed in a year.. if anybody has had similar problems or anyone would like to help me out with a bit of info that may help it would greatly be appreciated. im losing my hair on this one.
thank you

 

just a bit to add. when its having a start issue in the cold, the engine is lacking both spark and fuel pressure. i have replace the asd relay. still doing the same thing. im baffled. outside temp warms up to 40 or more and it has no issues.

 

what's your battery voltage running at?

 

battery voltage is 12.6 volts not running 13.7 running

 

When you say "won't start" is it turning over? Also if it is turning over how bout checking electrical connections? Do you have water in a bad plug then when it's cold it freezes then you have no continuity. Just my .02

 

truck is turning over fine. it turns over and like crazy. just wont start. every morning. but once the sun comes up it starts right up. weird thing. might be affraid of the dark.

 

thank you for the tip on the water in a bad plug that may be freezing. i will go over all the connections again to see if i missed any.

 

I actually recently had a misfire in the morning on a cold day. It might be worth popping your distributor cap off and checking out the points on the cap and rotor. My 98's were quite corroded.

 

i wish it had a distibutor right now. 1994 v-10 = no distributor. thanks for the input though.

 

ooooooo, that makes it MUCH more interesting.... possible failing ignition module, and them fellers ain't cheap.