Need some help on this one.
Okay when I got my truck the temp gauge didn't work and apparently it would run not hot, but warmer than it should before I got it, and I figured that out after I played with it a bit when I got it. I changed the thermostat hoping that would be the issue, but it had a brand new one already in it, I put the new one I bought in it anyways though. Anyways me and my dad decided to see if it had air pockets in the system, and then we found out if you rev it while the cap is off, and then let off it will spray a 2 foot geyser of coolant out of it. My dad said it may need another radiator and that this one may be stopped up, but I wanted to get yall's opinion on what the problem may be. It runs like a champ besides that, with the exception of when the battery is low it spits and sputters and backfires like its not firing right. Pretty sure thats not normal either. Please help if you can!!!!