OK.. i have thing really anoying rattleing that comes from under my 90 hatch. It will get louder if i rev it up and stuff like that. I already tighten down the heat sheild andit is still there.Anybody got any clues..

 

header and cat where they bolt togeather .. or just the cat .. commen problem with me .. ?? could be yours now to?? do the 1100 rpm test

 

any way it could be the piping rubbing?

 

I had the same problem, I tried fixing the heatshield and it didn't work. I ripped it off and the noise was gone, so I suggest taking it off all together.

 

thanks for the info... its sounds like to me i should just rip off the heatsheild and see whats happens.. i would do it now but its like 2 degrees outside with snow everywhere and my garage is packed. So it looks like ill be waiting to fix it.

 

whats the 1100 rpm test?