Artizan Posted March 28, 2022 Share Posted March 28, 2022 Reading up on NASIOC, people recommend pulling the ignition fuse, which I cannot find on this car (08 5MT), then cranking it for 10s three to five times in a row to prime the turbo with oil. I can find the fuel pump fuse but am worried that somehow the engine will fire up with residual fuel in the lines. Or is that entirely impossible? Do we have an ignition fuse? Anything else I need to do? Link to comment Share on other sites More sharing options...
whitexc Posted March 28, 2022 Share Posted March 28, 2022 There are a few ways to skin this cat. First would be to prefill the turbo before connecting the feed lines. Use a small syringe ....say something like kids pain reliever little plastic jobber or similar. Pull the spark plugs and crank for a bit. Can't fire up without plugs. Ignition circuit fuse. Fuel pump fuse is an option as is holding the go pedal to the floor. Most fuel injected vehicles will go into flood mode and shut off injector firing when the throttle is WOT during cranking. You may get an attempted start from any leftovers. Use good oil. Why did we change the turbo? Failure or upgrade? Sent from my SM-G996U using Tapatalk Link to comment Share on other sites More sharing options...
Artizan Posted March 28, 2022 Author Share Posted March 28, 2022 There are a few ways to skin this cat. First would be to prefill the turbo before connecting the feed lines. Use a small syringe ....say something like kids pain reliever little plastic jobber or similar. Pull the spark plugs and crank for a bit. Can't fire up without plugs. Ignition circuit fuse. Fuel pump fuse is an option as is holding the go pedal to the floor. Most fuel injected vehicles will go into flood mode and shut off injector firing when the throttle is WOT during cranking. You may get an attempted start from any leftovers. Use good oil. Why did we change the turbo? Failure or upgrade? Sent from my SM-G996U using Tapatalk Neither actually. It was sweating oil in the middle, so I decided to preemptively rebuild it. It’s already mounted so living that way is not an option. Pulling plugs is a massive pain in the ass on these cars. Seems like the fuel pump fuse is the easiest option, unless I can easily disconnect the coil wires. Link to comment Share on other sites More sharing options...
whitexc Posted March 29, 2022 Share Posted March 29, 2022 Good call on getting ahead of a failure. Pull the pump fuse and go for it. Sent from my SM-G996U using Tapatalk Link to comment Share on other sites More sharing options...
silverton Posted March 29, 2022 Share Posted March 29, 2022 hopefully this helps, car wont start if the lines aren't pressurized, might get a puff puff but nothing that'll fire Link to comment Share on other sites More sharing options...
Max Capacity Posted March 29, 2022 Share Posted March 29, 2022 FWIW, Yeah I'm that guy, when I installed the vf52 Aug 2011. After putting some oil in the turbo feed fitting before connecting the stock oil feed line. I started the engine like I do every time. You get full oil pressure much faster than you think. I also just started the ej257 when it came time. I had the fuel system primed a few times before starting the ej257. When it came time to start it the first time, the engine cranked over 3 times and was at idle, just like every day. That vf52 has over 160,000 miles on it, ej257 has 150,000+ miles. 305,600miles 5/2012 ej257 short block, 8/2011 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. (SOLD). CHECK your oil, these cars use it. Engine Build - Click Here Link to comment Share on other sites More sharing options...
NSFW Posted April 5, 2022 Share Posted April 5, 2022 If I remember correctly, holding full throttle while cranking disables the injectors. Link to comment Share on other sites More sharing options...
solidxsnake Posted April 8, 2022 Share Posted April 8, 2022 If I remember correctly, holding full throttle while cranking disables the injectors. This is true for DBW ('07+ Legacy), but not sure about the '05-'06 models. Link to comment Share on other sites More sharing options...
silverton Posted April 8, 2022 Share Posted April 8, 2022 SBF-5 disables the fuel pump on those ones Link to comment Share on other sites More sharing options...
NSFW Posted April 8, 2022 Share Posted April 8, 2022 05-06 are definitely DBW. Link to comment Share on other sites More sharing options...
awfulwaffle Posted April 9, 2022 Share Posted April 9, 2022 Yeah also works on 05 Link to comment Share on other sites More sharing options...
solidxsnake Posted April 10, 2022 Share Posted April 10, 2022 05-06 are definitely DBW. Yeah also works on 05 Ah right... I forgot that they are DBW, but just handle it differently (directly control throttle position instead of using the "Requested Torque" intermediary). Link to comment Share on other sites More sharing options...
NSFW Posted April 15, 2022 Share Posted April 15, 2022 There's a 'requested torque' intermediate step in my 05. pedal angle and RPM -> requested torque requested torque and RPM -> throttle angle Link to comment Share on other sites More sharing options...
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