modz 147 Report post Posted September 7, 2019 Prepping my e30 engine bay for the m54 and would like to confirm how others have done it please - Stock E30 fuel lines are still in place I'm using a M54/E46 330i fuel filter with regulator built in (3 ports: In, Out, vacuum) Supply: E30 supply line plumbed to fuel filter Inlet line: M54/E46 feed line to injector rail from fuel filter Tank breather: plumbed to PCV system next to throttle body Regulator vacuum: ?? E30 return line: ?? As the fuel filter is regulated, is the return even used? Charcoal canister: can this be removed? Quote Share this post Link to post Share on other sites
Eagle 1661 Report post Posted September 8, 2019 M54 return is at the filter. Suppose you could re purpose the old fuel return line for regulator vacuum or rip the hard vacuum line off an E46 etc and re route to suit Quote Share this post Link to post Share on other sites
modz 147 Report post Posted September 8, 2019 42 minutes ago, Eagle said: M54 return is at the filter. Suppose you could re purpose the old fuel return line for regulator vacuum or rip the hard vacuum line off an E46 etc and re route to suit Thanks @Eagle I stupidly hadn’t looked closely at the filter. I can now see the return is built in. so the remaining question is just the charcoal canister. I’ve previously removed these and just left the fuel tank breather line where it is open in the bay. Never hurt before and I doubt a 30 year old charcoal canister is that effective lol Quote Share this post Link to post Share on other sites
Allanw 1071 Report post Posted September 8, 2019 Dads E30 was an april 1990 built NZ 325i SE - it had no charcola cannister... just a hose ? No cats either - standard NZ issue at the time. 1 Quote Share this post Link to post Share on other sites
