I have fitted a ab88 FMIC on my 93 wrx. But now the car only pushes about 0.7 bar of boost and when on boost it makes a high pitched whining noise. any ideas???
Also the wastegate chatters when lifting off the throttle. is this normal??
Please help.

 

the chatter is normal.
The whinning noise could be a leak recheck your pipe joints,when you reassemble them try roughing the hard pipe ends up with some p400 paper and spray some hair laquer on the ends before you slip back into the silicon connecting sleeves then clamp up really tight.the hairspray drys & sticks it together really well. I had same kit &same problem & i did this & its been fine ever since. I know its alot of fannying aropund again but itll be worth it in the end. Good luck.

A leaky pipe will reult in you loosing boost & thats why your only blowing .7bar about.

 

lol fair play never heard of that one but will keep that in mind,may i ask how u found out this worked lol

 

Look for pin holes in the welds on the FMIC core.
If you have fitted an FMIC you really need a remap and your mapper should substantially be able to reduce or even eliminate the chatter.

 

Thanks for the advice i will have another go at the weekend.