I just posted in the welcome thread, so now I'm coming here with the issue that's on my mind, thus this is my first technical post.
I'm hearing a rattling noise as I have my foot on the gas in gear. It only happens when my foot's on the gas - it stops immediately as I lift my foot off of the pedal. It also only happens when I'm in gear and moving - if I try to rev it out of gear, it doesn't make the noise.
It's a metallic sound. It can best be described as the sound of wires scraping against something or cans scraping together.
It initially was only particularly audible in fifth gear at highway speeds. Today, however, I started to notice it while driving around town in lower gears. There are a few things that have changed recently. The temperature is noticably warmer today than it was the last time I drove it, a week or so ago. I've started to use regular gas recently, rather than the few tanks of premium with seafoam that I ran through it immediately after buying it. I changed my belts recently (and have hardly driven it in the few days since). I also just picked it up from my mechanic a few hours ago - he had changed my timing belt, water pump, radiator, and thermostat.
Given that it seems to be related to gas, I'm going to start out with changing the spark plugs, wires, distributor cap, and rotor.
Does anybody have any thoughts?