my 93 wrx does not always run on boost right it holds back but the turbo still boosts up feels like your running with the brakes on, it also runs very rich all the time

 

Sounds like an air leak to me

 

but it only does it evry so often, it will do it constantly for half a day or so then go like a train for the next few days but it always runs rich

 

 

thats wot i fort

 

any 1 els, to let you no its had new coils plugs filters coolant sensor throttle pos sensor new de cat system but falt was there before all this

 

Had this last week on my97 diagnosed 3 probs in the end, Turbo inlet pipe leak, Faulty maf , uppipe small leak, Dont think the uppipe gasket leak related but air intake leak killed my maf did not show on ecu error codes!!

 

did your car have a constant or intermitent fault