Skiier

It has been running with a recon unit for <200km so i really hope its not the turbo, I put that in earlier in the thread. Going to pull off the up pipe and see if something is blocking that, that is the only other thing I can think of that would affect spool with no wastegate. Could be something stupid like a rag or something? I can only hope. Pulling up pipe this evening so will see what that reveals.

yeah I tried all of the above including smoke test at crowesport. Things that have been done. Pressure test manifold and smoke test. wired closed waste gate blocked off BOV removed WG plumbing (free boost test) correct size restrictor in BCS plumbing. weld straight pipe in front flexi. new gaskets all through exhaust replaced silicone piping for intercooler There is more but that covers pretty much all the basics. Im going to remove the up pipe and check if thats blocked? going out on a limb but aside for the new turbo being stuffed its about the only thing I can think of? Might explain why it will let it boost up to 0.8 BAR if its loaded up in 2nd. No idea if that is common or what but will try anything at this stage. God damn this is frustrating.

So still head scratching. I have been through everything I can think of, latest work done, - replaced all intercooler pipes with new silicone (in case boost leaks) the old ones were a bit ratty. - deleted the flexi on the mid pipe on the exhaust manifold (as there was still a small exhaust leak) - cable tied all connections relating to boost solinoid / MAP sensor. - rechecked manifold with compressed air To add to this I took it in crowe sport in chch on friday to have it dealt to as I’m running out of time until it becomes my daily and they couldn’t solve it either. Nothing worse than spending good money on shop time and not be much further ahead, to their credit they gave it a good once over. So how it runs now, so no problem spooling up to 0.5 - 0.6 BAR if you load it up in second into third it will spool up to about 0.8 BAR but then be accompanyed to a loud hissing in engine bay. I have triple checked all vac lines and connections with compressor and added clamps everywhere. The hissing of boost makes me think what ever that it is related to, if not the main cause of my issue. I have not yet use a different AFM yet to rule out that side but need to chase down this hissing hose first to fully rule that out. I have read on some other forums things like knock sensor / AFM having symptoms like mine but that does not explain hissy boost problem. basically near the end of time/money/patience with the wagon. Not sure what else to do, can’t afford to have a shop do much more trouble shooting on their end.

boom. Cheers

Wondering if anyone on here can recommend a cheap place to get a trailer plug wired into a BG5 in CHCH? I Know it's a simple job but I CBF with electrics right now. Rung a few places and seem to ask 100-120 which seems like a lot for a sub 1hr job. If anyone wants to do it im happy to do a deal also.

Hey guys, Just wondering if anyone has a spare orange AFM that I could use to test if my current one is ok or not. Just doing some bug hunting and want to write off the AFM as a problem. Saves me from needless buying a replacement if mine is ok. PM me if you can help, many thanks in advance.

So ran test mode with ign on and solinoid is fine, opens and closes as it should. Got hooked up a 0.9mm MIG welding tip from the engineering shop down the road and lathed it down to fit perfectly inside vac hose. checked the ID of the old restrictor and it was 1.5mm so just lost 33.33% in flow rate. Went for a drive and it is now letting it spool up to 0.7 BAR bettern than 0.5 previously, so far so good. This has made another boost leak apparent as you can here the hissing at 5000rpm or so, must of tweaked something while playing around so going to run it up with the air compressor again and some soapy water to write that off good and proper Call this a hunch but Id be keen to test with a different orange AFM once I have checked for leaks. Reason is it looks like someone has opened the top of mine and reglueed it (guessing replacing the internals?) most likely means nothing but would be nice to write that off too. Not currently throwing any CEL codes. If anyone in CHCH has one I can use to test send me a PM, will save me having to buy one needlessly if my current one is ok. the saga continues...

hmmmmm, Im going to get a 0.9mm pill machined up tomorrow to be sure that is right. Will check with test mode and see if its cycling. sounds like its not getting power or something if its staying closed? This is also a great article I found for understanding subaru boost control that could be sticked under engine/turbo. https://cobbtuning.zendesk.com/hc/en-us/articles/200025164-How-Subaru-s-Factory-Boost-Control-System-Works Will see what happens tomorrow and post update

just to be sure, this how I'm currently plumbed.

Had a good week of further bug fixes. ended up replacing leads as 2 of them had decent splits in the silicon insulation and I wanted to eliminate this as a potential issue. I also ended up replacing plus as the residue from bad spark would not brush off and I also broke a plug while they were out (clumsy). Also made sure everything was fitted nice and tight as it should be. installed the Pivot manual boost gauge so I have an idea of what is going on boost wise. I also discovered I have a 2 port boost control solenoid as opposed to the 3, see pic. I have it plumbed so the port at 90 degrees from the solenoid connects to the "t" between the wastegate and the outlet port of turbo and the vertical port at the bottom dumps back to the intake post AFM. The MAP sensor connects to the intake manifold as it should. I ensured I have a 'pill' in the hose from the outlet of turbo, not sure on size but its a mig tip possibly greater than 1mm. The problem I now have is that it will only run 0.5 BAR of boost (factory WG spring pressure) regardless of weather I have the boost solenoid plumbed in or if I have it direct from turbo to WG. After some research I figured I either have an incorrect size 'boost pill' or the solenoid is up to no good. Im going to have a play around tomorrow with some different size pills (starting big then moving small) to see if that is the issue. Does anyone have the factory spec of a VF23 / V3 STI / 6S ecu 2 port pill size? Also interested in what clubsub thinks is the more likely problem?

pulled out other 3 plugs for sh*ts and giggles and looked like this checked gaps and all at 0.8mm note residue on plug from cyl 2. cly 1 had similar . Found that one of the leads was barely connected to plug tip, it basically fell out of head by looking at it. I reckon might have something to do with the surge/miss. Also curious as to what this is just noticed this while I was pulling out plugs that it looks like at one point it had some vac lines running to it but look like they got broken off?

Hey guys, was rummaging round under the steering column of my BG5b legacy and noticed these two sets of plugs conspicuously unplugged and wondered if anyone could tell me what they are for? found on the left side of column under the removable panel.

so judging by what you can see they look ok? more that happy to replace if it eliminates one more thing from the list

Pulled out plug and it looked like this its hard to see on the photos but had a white/yellow build up on bottom part of gap that rubbed off under finger. Looks like it has been running lean? Part No. Bosch FR6KPP33X which is a Platinum tipped plug as far as I can see. plugs are <3000km old so wondering if cleaning them up will do the trick? hate to waste good expensive plugs!

on a side note any one know the exact size of restrictor pill from turbo outlet to solinoid I should be running on a v3 STI 3 port 6S ecu, VF23? I have done some research and seams to be 1.5mm to 2mm according to internets but as I understand it that can make a large difference on boost pressure. I think what I have currently is approx 2mm but will remove and measure when I check plugs tonight.