hey guys. i gota 98 ex 2dr 5 speed and jus put an exhaust on it but sumtin started happening lately. every time after i get into gear and start accelerating....it sounds like a rattling noise in the engine like thers marbles in ther but this only occurs below 2k or 3k rpm. any ideas?

 

if it sound like its comming from the engine it could be your rods or pistons

if it sounds like its commin from under the car it could be your heat sheild

 

yea sumtin more like the heatshield probably cuz it sounds sumthing like that plus thats above the exhaust so sumtin mita got bumped/loosened or sumthing...thnks o just in CASE...any1 else wanan throw in thier .02 jus so i can b sure?

 

Could be the following:

Catalytic converter heat shield is bumping against the exhaust while you hit bumps in the road, etc...

Exhaust is bumping against something underneath.

You have an exhaust leak, double-check for backed out bolts, nuts and loose bolts/nuts, or a bad gasket seal.