hey guys im a complete nub with these things and when there's a problem ask i ask you experts for advice. Now my problem is that when i start up my 93 p10 g20 mainly old cold night and especially on wet days, my car starts up but the light will dim and brighten over and over again as well as my rpm will go up and down. also my radio will not turn on and my blower fan will operate very weakly...until everything fixes itself after driving for a while and my lights and rpm indicator stay stable. Now i suspect my alternator may be going (you knew when u got to rev up the engine a bit to get the battery light to turn off) but i been operating like that for bout a year now with no problems. I was wondering if they just be a problem with my spark plugs and if changing them would be a quick fix. Possibly the distributor cap? But hopefullt not the actual distributor. This is a very odd problem and any suggestions well be much appreciated. WOuld like to avoid changing the alternator..well.. because im cheap but just inquiring about the nature of the problem. Thanks in advance! You guys r great!