Engine Pops When Cold

[blykins]

Hey Guys...

Lately since the weather has changed and it's gotten significantly colder, my engine has been popping like a firecracker until it warms up. It's a 425W stroker, Demon 750, MSD 6AL (with full battery charge), and open headers. I can't seem to figure it out...but it's just done it in the past week since it's been colder outside. It doesn't have a choke...and it's not really hard to start...but when it does it pops really loud until it gets some heat in it. It kinda sounds like you're setting off a rack of firecrackers...just not that rapid in succession. I thought it could be the MSD box not being able to work properly due to a low battery charge...so I charged it overnight...and it did the same thing. Could it be that this is a normal thing, and it just sounds funky with open headers?...do I have water in the gas?....any ideas guys? Like I said, it just does it for the first 20-30 seconds or so...but if you rev it a little to build some heat in it, it stops and never does it again until the next day when the engine is completely cold. This has got me puzzled...it's probably nothing, but I like to worry about insignificant things. :-)

Thanks.