Hi guys! Newbie here, with a BIG problem! Here's my problem(s): A few weeks ago my 1991 S-10 Blazer (TBI) started going crazy. It started idleling (spelling?) rough, and when I get up to 50-60 mph, the truck begins shaking and looses power, particularly when I punch the accelerator. At first I thought the tranny was slipping, etc. But, here's the confusing part. When sitting still and the motor running, if I turn on the headlights, domelight, etc., the motor acts like it's going to stall. (but never does) And just today, I put the CD, amp, and subs back in. When I am going down the road and turn on the stereo, my Blazer again starts running rough and will sometimes stall. And the louder I turn the stereo up, the rougher the motor runs. Furthermore, I can hear a strange noise in my stereo speakers that wasn't there before. The noise seems to be harmonic with the motor. Oh yeah, and the CB all of a sudden doesn't work near as well as it used to. Whats going on here?? At first I though it was just the transmission about to grenade, but all this electrical stuff has me sitting here scratching my head. I tried searching through the troubleshooting section of my Haynes and Chilton books, but they left me more confused because they had too many possible problems/solutions. Do y'all think all these problems are linked? (they started about the same time) I was thinking it may be a bad computer, bad alternator, etc... Any ideas? Thanks, Aaron BTW, the reason I suggested it may be a bad computer, is because about a month ago, I accidently started my Blazer with the ALDL jumper still hooked up and the computer still in diagnostic mode!! OOOPS!! :-( Could that be the problem? Austin, Texas 1991 S10 Blazer, 6 in. suspension, 3 in. body lift, mt's.