I noticed one time yesterday when I went to start my truck, it had a little problem. It started...but nearly stalled out. It idled really rough at around 400-500 rpm, before jumping up a ways to normal. Then while driving, I noticed a high pitch noise, sortof like a squeel, but not completly. Kindof like a buzz. It would change pitches with the engine speed, also when shifting too. Then, I had drove it a few times since I shut it off since the last time it did that. I had no problems with any of the other times. Then, today, I had the problem again, except it actually took a few tries to get it started. I had to give it a little gas to get it to keep running for a few seconds. The noise was back, but between the two different instances where it's done this, I've had no problems with any of this. Any ideas?

 

Hmm... fuel filter old? how are your spark plugs? tune up was when last?

just thoughts coming to mind. PCV valve old?

 

all that stuff is less than a year old. I have AC delco plats and MSD wires new cap and rotor...uhh..pcv valve is new...

 

Mine is going through the same problems, what did you do to fix it?