S15 SR20DET boost leak check, do this first

if your s15 feels sluggish or boost cuts out early, 90% chance its a boost leak. get a pressure tester from supercheap or make one from a PVC cap and a tyre valve. pressurise the intake to 15psi and listen for hissing. check every clamp on every intercooler pipe. the factory clamps are rubbish, replace them with worm-drive clamps. also check the BOV for leaks, the stock ones wear out. fixed three boost leaks on mine and it felt like a completely different car.