pcastal

Hello, my engine is making a chirping sound when accelerating. It only makes the noise under a load, will not do it when revving it up. I have removed the belt and it stll makes the noise, so it is not anything belt driven.

I'm sure people will say cam phaser, but I personally don't think that's what it is. Here is a video of the same noise, caused by a loose spark plug. All my plugs are tight. Anyone had this noise?

pcastal

3 Spark plugs coming apart. Autolite 1 piece plugs replaced about 8 months ago. Porcelain cracked in multiple places

BOSS538

Dang that sucks! I changed mine and put in motorcraft and had no problem with them in last 25k miles. I would put antiseize on your new ones and definitely go ahead and change all of them. Least you found the issue! Now just to fix it!

Wires

Pcastal so that was your noise? You replaced 3 plugs and now noise I is gone? You said the porcelain was cracked were they also loose?