SR20 Running Rich???

[Hachihead]

S13 Silvia Redtop seems to be running rich and not holding its idle great.Will rev and drive ok but holding a certain rev seems to drop and rise a small bit.
When revved and left off it drops below 1k and nearly cuts out,may even cut out.

Any ideas?
AFM
Lambas
anything like that???

Fuel pump relay went the other day after i sparked the battery off the chassis,changed this and it started again fine,possibility of something else having gone when the relay went????

Thanks in advance

[rearwheelsteer]

i cleaned my afm and it drove better when youre chilling with slow throttle inputs but my s14 idled alot better when i changed the lambda!