well I have had a few problems like this..
1# change the battery
2# check the nitro system..yah I know but the last time this happend the nitro system was out of wack the gas flow was all over the map.
3# check the sidewinder...alot of people somtimes over crank these and the brass disk on the bottom of the reg breaks and it starts to really get screwy and do wierd things..mostly its the batteries that make the ecxali,s go out of wack.
the most ive had happen when my old silonoid blew it just leaked a little.
order a large pizza and and some beer...if it still appears to have drop off then drink more beer that should solve the problem.