I need some help!

I was on my way home today from the bay area in the 88 300TE, and started to notice a funny noise coming from my motor when I was going about 80mph. It disappeared when I went to WOT and disappeared wen I took my foot off the gas. Anywhere inbetween there was noise.

Anyways, I got back home, and parked it, and put it into park. I was getting my stuff together and noticed the sound was prominent. Well, I popped the hood, and looked around, and opened the oil cap. Heard the noise a bit more distinctly. It sounds like a plunger type of noise.

Also, the car runs silky smooth, and there are no excessive vibrations. Just this wierd damn noise... Anyone have an idea? I have no tools (I am away at school), and am very worried about my baby.


Anyways, please help me, and THANKS in advance!


-Justin.

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-Justin

91 560 SEC AMG - other dogs dd
01 Honda S2000 - dogs dd
07 MB ML320 CDI - dd
16 Lexus IS250 - wifes dd

it's automatic.