killaj12

hi guys .

i drive a 00 si that i just bought, and when i start the engine there is a weird noise that comes up until the car is warmed up .. it kind of sounds like its grinding, but not really .. is this normal ? if not, what could the noise be, and how can i fix it ? the car was modded with a fuel regulater, short ram intake, dc headers, high flow cat and an evo 2 exhaust, could it be because of one of them ?

also, when i shift gears, theres a sound that almost sounds like a blow off valve, only the car isnt turbocharged .. can any one help me with what that is ?

thanks for ur time and help ..

needahonda

that BOV sound is probably your cold air intake, you can hear the hiss from the engine sucking air passed your throttle body $.02

Wafler

Free bump for wanting to know about the same thing.