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Can't hit more than 10psi 2 Attachment(s) I can't get more than 10psi peak boost. It doesn't sound like I have an air leak but I am thinking that might be the problem. What do you guys think? I attached some logs from a couple short pulls. I went around and tightened up everything I could find but still can't get much boost. 2007 MS6 SRI - CorkSport with K&N filter TIP - CorkSport FMIC - unknown brand, probably ebay special Cobb AP V3 - Stage 1+IC map BPV - CorkSport RMM - CorkSport HPFP - Upgraded internals from Autotech Power Steering Cooler Upgrade - DamondMotorsport |
Since you registered 5.66 g/s air flow at 5466 RPM, I'm gonna go out on a limb and say it's your MAF sensor lol |
Well, your primary O2 sensor is shot. 14.85AFR across the board. Change it and try again. I recommend either OEM or NGK. Quote:
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Just had to replace primary O2 sensor for same reason months ago - constant 14.85 AFR. That sensor is definitely dead. For my '08 MS3 I replaced it with the NGK NTK 24357 Oxygen Sensor ($120 on Amazon/$115 on Rockauto). It has been working great. |
Strange that it doesn't show an engine code. I'm afraid to order the wrong one. Are you sure that one will work for me? This is what I found as same part number but I don't want to pay 300... http://www.sparespro.com.au/ngk-oxygen-sensor-lza07-md1 |
They sell a NGK O2 sensor on Edge Autosport for about the same price, maybe a little more. I would trust NGK before NTK any day the week If you don’t want to go with OEM Sent from my iPhone using Tapatalk |
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Isn't NTK an NGK brand? The part always comes up as NGK NTK 24357. Interesting though that Edge sells it as NGK 24357 for $40-45 more and show retail price as like $330... seems like the same part to me despite the disparities. Am I wrong? |
Can't hit more than 10psi I’ll be damned. Learn something new every day. I had no idea they were the same company. Carry on. Nothing to see here lol Edit: For the record, I ONLY buy OEM sensors, so I’ve never actually bought anything from NGK/NTK other than spark plugs. Sent from my iPhone using Tapatalk |
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I see no mention of that Denso part anywhere for an MS6 - definitely not the part I would try. Looks like the NGK part number for 2006/2007 MS6 primary O2 sensor is ngk 24354. Looks like it's about $140 on Amazon. |
What is OEM then? |
Edge lists L3M6188G1F as OEM parts for your MS6, Rock Auto does show that Denso as a part for your MS6. Hopefully an MS6 owner can weigh in and confirm... |
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2 Attachment(s) Well I was trying to get OEM but I couldn't find what OEM was. I ordered the denso one but the part actually says NTK on it with the same maching number as the one I pulled off. UPDATE: New o2 sensor installed. Thank you for helping me identify my false AFRs. Now, I noticed a difference. The numbers obviously change now, but I did experience a tiny bit more power and I even hit over 11 psi on one of the 2 3rd gear pulls I have attached. I still think I have a boost leak or something. I should be hitting 15psi peak with the tune I am running. I'm on the 91 tune right now but I still think it peaks at 15psi. Can you see anything in my data logs? Thanks! |
Sounds like a leak to me although I'd probably start with reflashing your map now that you have that O2 sensor replaced. If you don't have a boost leak tester I'd physically tighten/check all connections on air intake and turbo inlet pipe. Those connections might look OK when you're just looking at them but allowing air to leak once the systems are pressurized to 10 PSI, a boost leak tester would help isolate this since you would see pressure drop once pressurizing to 10 PSI. I'd also check the CS BPV, I've never used that one personally but I believe you're supposed to be disassembling and lubricating/servicing 1-2 times a year. Sorry not the most helpful post but hopefully the post bump will get someone to look at this thread with better advice. |
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I reflashed, tightened everything up AGAIN it is super tight and still same exact problem. I uploaded the stage1+IC with 93 and also took apart the bpv and it looks very good. Like brand new. I cleaned it and put the grease they recommended in it. Test drove it again, still cannot get over 11.25lbs. I don't know, maybe 11.25 is normal for boos pressure starting out at 3k rpms. Maybe the 15, 16 lbs they are talking about are when building from 2k rpms? Anybody have any experience with a stage 1 or 2 cobb setup? The only 2 things I know to do right now is find someone with a boost leak tester and contact cobb and hope they can shed some light on the situation. Things to note: I do have a slight exhaust leak somewhere (not sure where) and I also think it needs a valve cover gasket because I have oil all round the valve cover. Could these two items affect my boost pressure? |
Borrow an EBCS from someone else and see how things will look like. |
Same Issue I'm having the same issue with my new turbo. was pushing 16psi stock with the old turbo. Replaced the clutch and turbo and couldnt' get over 12.45psi. subsequently replaced all boost hoses with silicone ones, replaced factory BPV with aftermarket on, tried switching the hoses around on the BCS and even replaced the BCS with a spare I had laying around. I'm still maxing out at about 12.5psi and it's gotten aggravating now. I can pressurize the system to about 10psi, it won't go over 10psi and hold it. as I pressurize over that to roughly 20, I don't hear an air leak, but as soon as I remove the air compressor from it it immediately drops to 10 again . I miss the 16psi it had and I've got no other ideas on what it could be.:17: |
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Go back to the beginning. Was it a stock K04? What did you replace it with? If that is where the problem began, that is where the solution will be. None of the new parts after the turbo swap are likely to have been needed, as they were working before. You need to carefully consider every part of the induction system that was moved, changed or altered in connection with the clutch change and turbo swap. Going back together is where the problem arose. Are you sure it went back together the same way (vacuum lines, EBCS hose configuration, lines to the turbo)? What about turbo wastegate setup? Sounds like you are running on spring pressure alone with maybe an open, cracked, split or misrouted vacuum line. |
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would someone be able to take a look at my logs too please Ok so the misses bought a BL gen 1 mps about a month ago. Current mods we have installed are. Cobb accessport Single res delete Short ram intake to turbo (corksport) Turbosmart dual port bov 70:30 Corksport hpfp internals Damond rear motor mount It was driving awesome untill about a week and a half ago. I had installed the damond rear motor mount 3 days before this issue occurred. So we were driving for about an hour on the freeway just cruising. Then hit the town. As we went turned a corner at an intersection at low rpm in second gear i went to accelerate back up. As i did this the car hesitated and felt like fuel cut. I had fuel slosh in my old subie but only if i was going ridiculously fast around a tight corner and it felt exactly the same. Like someone had slammed the brakes on almost haha. It continued to do it every now and then on the way home but only at low rpm at cornering speeds in 3rd and second. Also in conjunction with this i noticed we were only peaking boost at 13psi (3rd, 4th, 5th, 6th). After a week of looking for boost leaks etc i can rule that out i think. I was about to replace the wastegate yesterday when i figured id do plugs at the same time. I never replaced the wastegate but replaced the plugs just to see how it goes. It drove fine again. I was happy we had fixed the issue. Peaking at 16-17 psi again and no issues of ‘bogging down’ but this joy only lasted for about 10 minutes then it was back to its old self again. I decided to give it a rest until today. Has anyone experienced such issues before? I took some logs just before if anyone wants to have a look |
here i my 3rd gear pull sorry guys I'm very very frustrated. been chasing this issue for the last 2 weeks. if someone could tell me why I cant upload my datalog that would be awesome. cheers. I'm just over this car and I'm sick of reading through pages and pages of threads. ;please someone help me. I also cant make a new thread because of some ungodly reason so ive taken to these avenues. cheers. oh quickly also it may have something to do with it being an excel spreadsheet? |
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ok so I just saved a 4th gear pull as csv. and I still cant upload. I click browse pc for the files and select the file but nothing shows on the mazdaspeedforums page. could this be that I'm a new user? and not allowed to post anything decent yet? |
finally able to upload 1 Attachment(s) here is a file of a 3rd gear pull |
1 Attachment(s) Quote:
It looks like you're running a Stage0 OTS map from COBB. That's probably your biggest problem. Please make sure to log your Accelerator Pedal Position (APP) in your next log. Are you sure that the Map that you are running is actually intended for the modifications on your car? |
I'm trying to figure out what might have caused your hesitation. Low boost would simply feel down on power. None of these symptoms point to your new RMM. BTW, fuel cut / load cut feels nothing like hesitation. If you don't have your seatbelt on, your face will meet the steering wheel during a cut. Yes I'm exaggerating, slightly. |
Thanks guys ill do a split log of my drive home thisafter noon. What exactly would you like me to select to log :) cheers. And yeh man it feels like ive hit a brick wall almost. Like ive stabbed the brakes sharply for about 0.5-1 second. Im starting to thinking that the boost issue may be due to the ecu trying to save itself from the underlying issue that is probably causing the fuel cut? |
Found issue Thanks for your time guys. I finally found the issue. I decided to pull apart my intake. Wallah. As i took the pod fulter off there it was. The insert inside the housing for the airflow meter had gone wonky and almost sideways. I assume blocking the air flow meter. Fixed this back on and car has been awesome all the way home. Thanks for the help guys. I appreciate it all |
Nice |
Dear Mr First Time Poster, Make your own thread. Thank You |
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