Many experienced mechanics have trouble with the Fiero rear brakes & the E brake !!
Use only Rebuilt rear calipers from the fiero store & they are not always good
do not buy rock auto rebuilt calipers or others
FIRST your rear brakes have to work..Make sure they work properly,if you have the cables & ajuster working properly this will be 3/4 of the battle,even experienced mechanics overlook this important step ,nothing will work correctly if the calipers are not correct
place the rear wheels in the air on jack stands make sure the right & left rear wheels spin the same
loosen up the cabin brake ajustment lube this cable,do not proceed untill the cables are free
then make sure the cable ajusters that runs along the frame are working properly they should turn easily
lube them & the cables if frozen, the cables should move in & out easily,, the cables should require no lube but after 20 years they may need lube .use a tooth brush to clean the ajusters I cut half the bristles off..shorter to create a stiff cleaning brush,just short of a wire brush do not half step,, do it right,make it as close to new as you can ..
do not lube cables if they work O.K.
you can cut the sheath to open it if cable is frozen ,,lube it,, free it & tape over the cut
check the cables to make sure they are hooked into the lever as shown by picture 14,5 on page 214 of the Haynes fiero manual
page 214 will be a big help,,or page 295 of the Chilton manual
the cables must have the same reach & slack,you have to fiddle (tech word) with the cables to achieve the same length at the lever
if the rear brakes do not work properly it will be almost impossible to get the E brake to work
shim is a very last resort
when you bleed the brakes ,you must have a strong spurt of fluid ,,there should be no Dirty looking fluid flush it out
the fiero rear brakes need attention to detail
actuate the rear brakes a small amount at a time ,do not be running the screw type actuator ajuster in & out ,the seals are fragile
hopefully you will not have to shim
never use cheap low price brake pads on a Fiero ,, Use only top quality premium brake pads like wagner thermo quiets ,Fiero store Carbomets or something like pepboys Diamond,, O'reilly brake best select..cheap pads is why so many Fiero have bad brakes