| To see if your walbro pump is at fault, just put a fuel pressure gauge on your fuel rail to see if the pressure is rises and holds with boot. It should be a linier ratio to boost and not fall off at the top end.
__________________ '97 M3, Estoril blue, 2 dr, 5spd, Stg 2+ supercharger @ 11 psi, after cooler, OBD1 intake manifold, AA track pipe, fan delete, Walbro fuel pump, UUC aluminum flywheel, H&R springs, Koni dampeners, Eibach sway bars, Ground Control F&R control arm bushings, slotted rotors, brake cooling ducts.  |