Bryan Schmidt

So I've got a chirp that's driving me crazy in more then one way. I've replaced the power steering pump, idler pulley, tensioner pulley, new belt, and removed the ac belt and still chirping. I thought maybe an exhaust leak. Muffler shop brought out the stethoscope and put it from head motor all the way back and no leaks. Alternator wasn't making noise either as he put it right on it. Only funny noise he thought was the injectors were making a odd sound. Not sure what they are supposed to sound like but it sounded like a squirting wet sucking noise. The truck has 227,000 miles on it and the only issues I've ever had with it was having to replace the radiator and o2 sensors. I can't afford to keep tossing money into this without fixing the problem. Any advice would be greatly appreciated. Thank you for your time. Have a good day.