when the revs fall back down from about 4, a noise is made from the front, anyone know what the problem is? by the way, car is a my92 wrx. any help appreciated.

 

What sort of noise? Is it a vibration/rattle & is it only when backing of on the throttle. Could be a loose heat shield but its hard to diagnose without you describing it.

Dean

 

the noise is sort of a rattle, only happens when i ease of the throttle after going over around 4000 revs

 

Soumnds like one of the heat shields - mine does it as well. Not sure the best way to fix it tho

Richard

 

Definately sounds like a heat shield. Best thing to do is to pop your head under the front of the car when the engine is cold & tap the heat shields around the front headers (manifold pipes) you will probably find its one of the larger ones to the side. The bolts wear through the heat shield after time, If you can remove the bolts fix it by using a large washer if not a tack of weld does the trick.

Dean