had one of these fitted last week, and just out of curiosity i was wandering what problems they can cause. it wouldn't cause it to splutter and stall would it?

 

Fitted to what year of car Etc.

If your Fuel Pressure regulator was Lazy it could richen it up badly, Was the Battery Disconnected for a long period ??, Could be Maf Related, Lambda or just purely coincidental & nothing to do with the Pump.
Does it Rev / Pull Cleanly when on Boost ? Lots of Black Smoke ??

Dean

 

its a 95 wrx wagon, the battery was not disconnected from what my partner can remember.
there was some black smoke at first but that seems to have stopped, but the car is going no more than 40mph without staling, spluttering, its just won't boost at all, won't rev, its fecked.

 

it was the bloody maf sensor, doh!!!!