savannahvolvoguy Posted February 22, 2017 Report Share Posted February 22, 2017 I agree that an AFR in the 12 range is too lean. There might be your boost pressure. Now why is it so low? Solving that might correct the low boost pressure. Link to comment Share on other sites More sharing options...
savannahvolvoguy Posted February 28, 2017 Report Share Posted February 28, 2017 Good grief I must have been asleep when I posted that. 12:1 is rich not lean. Either way its not quite correct. Link to comment Share on other sites More sharing options...
Turbo5cyl Posted March 9, 2017 Author Report Share Posted March 9, 2017 Hey guys, have not posted in a while since I have been trying to figure this out. I put in a new MAF, it reads the same peak flow as the old one but the weird throttle body issue is now completely gone. The MAF peak reading is 915 kg/hr which coverts to 33.5 lb/min. That seems high to me for only 11 psi, isn't the k24 only rated for like 35 or so lb/min?? I did a boost leak test to make sure the intercoolers and pipes are ok, intercoolers held 25 psi no problem. The entire system (from the MAF on) has a little leak around the MAF sensor and body fittings at 5 psi. I did not go higher to avoid damaging oil seals. Since the MAF is never under pressure, those little leaks REALLY should not affect anything. I found 2 other bigger leaks at intercooler-throttle body pipe and TB too, fixed those. Tried adjusting the WG some more, right now its set to 8 psi (TCV unplugged). It spikes to around 16 psi when I get on it hard but falls right back down to 11 after. Still haven't seen 15 psi for a full pull :(. Link to comment Share on other sites More sharing options...
Ihatespeedbumps Posted March 9, 2017 Report Share Posted March 9, 2017 Sounds like we have determined that the intake system is not leaking. For my 04 R I really had to adjust the waste gate setting to make it correct, don't remember how many turns but I ended up moving it 6 times before it was set right. My inclination is to go that route. Move it a full turn or two and see how far it goes up. Link to comment Share on other sites More sharing options...
savannahvolvoguy Posted March 11, 2017 Report Share Posted March 11, 2017 I just got vida installed but haven't really played with it yet. Can you see TCV solenoid duty cycle? It may provide a clue as to if the engine thinks it's satisfied. If it does then it's a software issue. If not then it seems hardware related. Being you could get it with your manual boost controller I think the hardware is not your problem. Link to comment Share on other sites More sharing options...
Turbo5cyl Posted March 11, 2017 Author Report Share Posted March 11, 2017 Im afraid to add boost using the WG adjustment since the car does spike to like 16 psi for a moment. I do not want a bigger spike. I can see the duty cycle and its around 50% under WOT so the ecu is satisfied with the boost its getting, and I had someone from another forum check my software and it is set for 15 psi so I highly doubt its the issue. I am really considering just putting a MBC on it and calling it fixed....I had a MBC on my old s60 T5 upping the boost to 19 psi (tuned for 16) and it loved it so maybe it will work just fine here too for a few psi Link to comment Share on other sites More sharing options...
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