I changed the fuel pump to a walboro 255 on my s13 and now the is a ratteling noise like no other in the back of the car. The battery relocation is tight, and i checked the exhaust so is it the fuel pump that i didnt zip tie. At 3 it rattles like crazy and at 4k it stops and the car runs smooth. I just hope it dont spark in the gas tank!!!
Did any one have this problem or might know what it is?