Fabsx Posted July 17, 2020 Share Posted July 17, 2020 Also try and see if you can get your dam up before anything. Reset ecu with cobb. Warm up vehicle for 10mins for ecu to relearn, shut off and restart. Drive vehicle to open road without going into any boost. Then in 3rd gear, bring rpms at 2500rpms to build about 2-4psi of boost for roughly 5secs or soo. (Brake boosting will be needed to achieve this) After 5-10secs, let it through the rpms and hopefully your dam increases to 1. (If everything is good, you’ll see it increase) After that, verify boost levels. Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Sarang Posted July 17, 2020 Share Posted July 17, 2020 There's a small line on the back of the intake manifold that used to pop off on mine. I basically had to tug on the lines there to find the one that was loose. It sprung back to press on the nipple, so under vacuum my car ran pretty normal, but then wouldn't build much boost and would run rick when it did. It's actually the line that runs to the BPV. A datalog would help a lot in identifying the problem. Link to comment Share on other sites More sharing options...
Falcor Posted July 17, 2020 Author Share Posted July 17, 2020 I did post the datalog from my drive home a couple days ago. It's on the first page of the thread. Link to comment Share on other sites More sharing options...
Sarang Posted July 19, 2020 Share Posted July 19, 2020 OK I looked at that. You're not logging AFR, that would be useful information and helpful to diagnose. It would also help to determine how risky it is to drive it as is. Link to comment Share on other sites More sharing options...
Falcor Posted July 20, 2020 Author Share Posted July 20, 2020 I'll swap out the temp gauge for AFR. Also, after cleaning the MAF, the DAM still just sits at .812. Goes up a bit if I get on it, but in normal driving just sits there. I didn't have any time to work on it over the weekend. We are moving in 2-3 months (moving with company) and were packing. Link to comment Share on other sites More sharing options...
Fabsx Posted July 20, 2020 Share Posted July 20, 2020 I'll swap out the temp gauge for AFR. Also, after cleaning the MAF, the DAM still just sits at .812. Goes up a bit if I get on it, but in normal driving just sits there. I didn't have any time to work on it over the weekend. We are moving in 2-3 months (moving with company) and were packing. Get knock sums/count for each cylinder and do a log Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Falcor Posted July 20, 2020 Author Share Posted July 20, 2020 Is the lower right gauge correct for AFR? Couldn’t find AFR in the menu. Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Fabsx Posted July 20, 2020 Share Posted July 20, 2020 Is the lower right gauge correct for AFR? Couldn’t find AFR in the menu. Sent from my iPhone using Tapatalk Negative It’ll be AF Sens 1 Ratio Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Falcor Posted July 20, 2020 Author Share Posted July 20, 2020 Ok, thanks. Link to comment Share on other sites More sharing options...
Falcor Posted July 21, 2020 Author Share Posted July 21, 2020 I’ll log this on the way to work tomorrow. Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Falcor Posted July 21, 2020 Author Share Posted July 21, 2020 I didn't log on the way to work, but on cylinders 1-3 Knock Sum was around 2-3 max. On cylinder 4 it maxed around 50-60. Didn't get on it, just normal driving. I'll log on the way home today. Link to comment Share on other sites More sharing options...
awfulwaffle Posted July 21, 2020 Share Posted July 21, 2020 No bueno, that's only a little short of setting a P0304. Link to comment Share on other sites More sharing options...
Fabsx Posted July 21, 2020 Share Posted July 21, 2020 Agree Must be time to swap cyl 4 coilpack to cylinder 2 and see if it corrects the count on 4 and follows to cyl2 Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Falcor Posted July 21, 2020 Author Share Posted July 21, 2020 I logged the drive home and will have it posted shortly. In the meantime, here is the AP when I got home. I did step into it 2-3 times in 3rd-4th so it would be logged. Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Falcor Posted July 21, 2020 Author Share Posted July 21, 2020 https://drive.google.com/file/d/1ph2mOb8Efm_5HVQZLkzU_f4yY7gAoJHW/view?usp=sharing Link to comment Share on other sites More sharing options...
Falcor Posted July 21, 2020 Author Share Posted July 21, 2020 Just realized there is a separate datalog setup on the AP. Will set that up and re-log on the way to work. Link to comment Share on other sites More sharing options...
Fabsx Posted July 22, 2020 Share Posted July 22, 2020 Have you tried my reset method and see if the dam goes up? Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Falcor Posted July 22, 2020 Author Share Posted July 22, 2020 Have you tried my reset method and see if the dam goes up? Sent from my iPhone using Tapatalk Not yet but planning to. Link to comment Share on other sites More sharing options...
Fabsx Posted July 22, 2020 Share Posted July 22, 2020 Not yet but planning to. Give it a shot before anything. Just starting to think your coilpack is going bad Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Falcor Posted July 22, 2020 Author Share Posted July 22, 2020 Log from this morning. https://drive.google.com/file/d/1Hdmnj5nboUGaluVeZMlDrNU--icNuMIt/view?usp=sharing Link to comment Share on other sites More sharing options...
Fabsx Posted July 22, 2020 Share Posted July 22, 2020 Swap coilpacks from four to two and see if the count follows. If not, how old are your plugs? Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Falcor Posted July 22, 2020 Author Share Posted July 22, 2020 The plugs were replaced by the PO at 60k. It now has a little over 97k. Link to comment Share on other sites More sharing options...
FLlegacy Posted July 23, 2020 Share Posted July 23, 2020 The plugs were replaced by the PO at 60k. It now has a little over 97k.I would probably replace them, and while doing that do a compression check. Sent from my SM-G965U using Tapatalk Link to comment Share on other sites More sharing options...
Falcor Posted July 23, 2020 Author Share Posted July 23, 2020 I'll be doing more engine work than I've done in years. Hopfully this will track down the issue. I think I'll finally have some time to start on this Sunday. Just ordered a compression tester. Link to comment Share on other sites More sharing options...
Fabsx Posted July 23, 2020 Share Posted July 23, 2020 I'll be doing more engine work than I've done in years. Hopfully this will track down the issue. I think I'll finally have some time to start on this Sunday. Just ordered a compression tester. It’s quite easy doing the plugs. Not sure on your mods, removal of intake box and charge pipe gives room for passenger side. Driver side is only the battery. 12mm for the bolts of coilpacks, two/three inch extension with a sparkplug socket to do the plugs. Try also stretching the coil spring inside the coilpack boots to insure a proper connection.(I do this to all the Subarus I’ve work on doing plugs, never had issues with it) Insure sparkplugs are gap to spec, “.027” is the sweet spot. Don’t forget to move cyl 4 coilpack to cyl 2 to see if it follows or if doing the plugs helps too. And please use NGK plugs. Don’t cheap out with anything else or denso. I did try the new NGK Ruthenium on my 2010 GT and they’ve held up pretty good with my protune and making 500hp lol. Part number I used is NGK #93420, again gap mine to .027. Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now