Hey guys, I have a 94 4 door S10 Blazer with the 4.3 CPI setup. I got on the interstate a week ago and the truck didn't wanna go anywhere, just revved so I pulled over and as I came to a stop it started squeaking and stalled out. It will still start and run, but squeaks intermittently and runs weird. It has low oil pressure until you rev it up, then it gets up to normal oil pressure. The alternator pulley and belt were recently damaged by an aftermarket intake, hoping that this is all it is but I doubt it. I am thinking oil pump related. Hoping someone can help, this is my only vehicle and I've dumped over 3 grand into it this year..

 

Where does the squeaking sound come from? front, back, top, bottom of engine?

 

It's hard to tell because it's so loud, but it sounds like around the front of it based off the short time I let it run just now.

 

Could it be your AC compressor? Some times my my compressor squeaks and it sounds like a squeaking chirping.
then again it could be the alternator, a bad alternator would lock up on you causing the squeaking and if your belt is really tight it could stall your engine.

 

I can't get the truck to start right now, think the battery got too low from sitting, but would the alternator still be able to turn and cause the squeaking ie bad bearing? Really hoping it's something small, I don't wanna let go of this truck after the money and work I've put into it to do what I've done..