adj789 Posted April 29, 2014 Author Share Posted April 29, 2014 I'm still getting an intermittent CEL for misfire on cyl 2 so to me it makes sense there's something wrong with only that cyl. Also my other mechanic thought the same thing, the pistons ring is bad. Link to comment Share on other sites More sharing options...
USMC6217 Posted April 29, 2014 Share Posted April 29, 2014 Are you losing oil? With the car at idle pop off the oil fill cap and see if you have smoke coming out Sent from my SPH-L720 using Tapatalk Link to comment Share on other sites More sharing options...
USMC6217 Posted April 29, 2014 Share Posted April 29, 2014 Wha do you fuel trims look like? A vacuum leak can cause the misfire as well as a bad injector. Both of those will affect your fuel economy as well. Ijust finished up a 2 month long witch hunt for a vac leak bc my idle LTFTs were at like 12-13, cel for cyl 1 misfire and I was getting crap boost numbers. Now after I found the issue, no cel, LTFTs are arpund 3-4, mpg is 23-24 and im hitting target boost every time. All for 8 bucks total in parts. Take your time do it right my friend Sent from my SPH-L720 using Tapatalk Link to comment Share on other sites More sharing options...
adj789 Posted April 29, 2014 Author Share Posted April 29, 2014 didn't get fuel trim level but he did find this concerning relative manifold pressure is at -18in. at idle Link to comment Share on other sites More sharing options...
Moderators BarManBean Posted April 29, 2014 Moderators Share Posted April 29, 2014 didn't get fuel trim level but he did find this concerning relative manifold pressure is at -18in. at idle Pretty sure that's normal. "Bullet-proof" your OEM TMIC! <<Buy your kit here>> Not currently in stock Link to comment Share on other sites More sharing options...
adj789 Posted April 29, 2014 Author Share Posted April 29, 2014 also no smoke from the oil Link to comment Share on other sites More sharing options...
USMC6217 Posted April 29, 2014 Share Posted April 29, 2014 I could be wrong in this and im sure others will chime in but I thought normal relative psi was -9 to -12. Are you burning oil? When was the last time you checked the dip stick? Do you have an android device? If so there is a $25 Bluetooth obd 2 adapter that can be used with the torque app. A datalog would be real helpful right about now. Sent from my SPH-L720 using Tapatalk Link to comment Share on other sites More sharing options...
T_Altland27 Posted May 3, 2014 Share Posted May 3, 2014 Check the gapping on the plugs Link to comment Share on other sites More sharing options...
Range Posted May 3, 2014 Share Posted May 3, 2014 also no smoke from the oil If your getting a misfire on #2 I'd be looking at your valves. Most likely have a bad seat. Link to comment Share on other sites More sharing options...
adj789 Posted May 3, 2014 Author Share Posted May 3, 2014 yeah that's what he thinks, bad valves or piston rings the plugs look fine I'm going to try and get a datalog wednesday, I have the cable just need to get the right drivers set up (assuming the cable works) Link to comment Share on other sites More sharing options...
Range Posted May 4, 2014 Share Posted May 4, 2014 I don't think its rings! Valve seat will make it idle poor when cold. Then seem okay as it gets up to temp. That's at first. Over time it will burn the hole seat and kick misfire all the time! Seen this more times then I can count! Same thing with my GT. Poor fuel mileage and misfire code always the same cyl. If you have over 100,000 miles on that eng its time to adj the valves witch no one does cause of the cost to pull 4 cams and changing shims! You can do a leak down test on that cyl. Pull the heads and send them out to be reworked. At the same time check the end play in your turbo. If your still running stock VF40 you will most likely find end play and want to change out your turbo. Link to comment Share on other sites More sharing options...
adj789 Posted May 4, 2014 Author Share Posted May 4, 2014 This matches my symptoms! I'm at 98k miles, I hope the turbo isn't bad. upon further reasearch it sounds like the valves are burnt I think the previous owner was an idiot and didn't take car of the car what would/should a shop charge to do my valves? Link to comment Share on other sites More sharing options...
Range Posted May 5, 2014 Share Posted May 5, 2014 So you know, I'm the owner operator of Range Automotive in Somersworth New Hampshire. And I spent 25 years working for Subaru before opening my shop in 2007. If your turbo is okay and you have not done the timing belt do at 105k? Your looking at about 2,500.00 Parts labor and machine shop. If the timing belt, water pump and pulleys have been done you can knock 500.00 off that. Keep in mind if it needs to be ripped down now is the time for things like timing belt, water pump and pulley set as well as a good time to upgrade your turbo. God speed makes a 16G turbo for under 500.00. Hope this helps!! Good luck with it. Link to comment Share on other sites More sharing options...
Max Capacity Posted May 5, 2014 Share Posted May 5, 2014 This matches my symptoms! I'm at 98k miles, I hope the turbo isn't bad. upon further reasearch it sounds like the valves are burnt I think the previous owner was an idiot and didn't take car of the car what would/should a shop charge to do my valves? Burnt valves are not caused by the previous owner not taking care of the car, they are caused by the timing flaw in the OEM MAP. 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...
adj789 Posted May 5, 2014 Author Share Posted May 5, 2014 Burnt valves are not caused by the previous owner not taking care of the car, they are caused by the timing flaw in the OEM MAP. that sucks, was there a recall? does the lemon law apply? also am I going to have to retune the ECU if they pull the block? Link to comment Share on other sites More sharing options...
rob-2 Posted May 5, 2014 Share Posted May 5, 2014 that sucks, was there a recall? does the lemon law apply? also am I going to have to retune the ECU if they pull the block? No recall. Not safely related. Lemon law doesn't cover second owners or much beyond a truly troubled car. You'll retune if you want to keep the car running well. Link to comment Share on other sites More sharing options...
covertrussian Posted May 6, 2014 Share Posted May 6, 2014 It's an emissions thing, they keep the USDM turbo cars in closed loop (lean AFR's) longer while in boost. Because of there is not enough fuel to cool down the combustion = burnt valves. This is the table you modify in your tune: http://images.rvsmods.com/var/albums/Cars/LGT/Engine/ECU/Tuning/CL-to-OL-Delay/CL%20to%20OL%20Delay.PNG?m=1391928907 You can see the AFR difference instantly (and torque gain): http://images.rvsmods.com/var/albums/Cars/LGT/Engine/ECU/Tuning/CL-to-OL-Delay/CL%20to%20OL%20Delay%20DynoGraph.png?m=1391928907 05 LGT 16G 14psi 290whp/30mpg (SOLD) 12 OBP Stock 130whp/27mpg@87 Oct 00 G20t GT28r 10psi 250whp/36mpg 22 Ascent STOCK Link to comment Share on other sites More sharing options...
Max Capacity Posted May 6, 2014 Share Posted May 6, 2014 Here's the thread about the flaw in the MAP. Mike told me of this back in 2008,when he first tuned my wagon. 5th gens have the same issue. http://legacygt.com/forums/showthread.php/dangerous-cylinder-trims-5th-gen-lgts-193842.html 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...
covertrussian Posted May 6, 2014 Share Posted May 6, 2014 Here's the thread about the flaw in the MAP. Mike told me of this back in 2008,when he first tuned my wagon. 5th gens have the same issue. http://legacygt.com/forums/showthread.php/dangerous-cylinder-trims-5th-gen-lgts-193842.html Thanks looking into it! 05 LGT 16G 14psi 290whp/30mpg (SOLD) 12 OBP Stock 130whp/27mpg@87 Oct 00 G20t GT28r 10psi 250whp/36mpg 22 Ascent STOCK Link to comment Share on other sites More sharing options...
adj789 Posted May 24, 2014 Author Share Posted May 24, 2014 So I took it to my mechanic and he wont do the repair because he thinks it's too risky. He thinks the pistons are scored and some of the other valves could be bad other than cyl 2. He thinks I should just replace the engine because I'll end up paying just as much to fix everything else. Is this a valid concern? I could take it to someone else, fix the valves and sell it (maybe) but I'll be out the $4k I already put into it. It looks like reman'd engines are around $3800 which I can't really afford. I don't know what to do. Link to comment Share on other sites More sharing options...
Max Capacity Posted May 24, 2014 Share Posted May 24, 2014 My click here link has what you should do, new ej257 and rebuild your heads. Even that was a load of money... Can you do some of the labor yourself ? 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...
adj789 Posted May 24, 2014 Author Share Posted May 24, 2014 no I don't have the tools or means to do any of it unfortunately also what's a good place to get a reman'd longblock? I've only seen a few places, with a google search, that even have these engines Link to comment Share on other sites More sharing options...
Max Capacity Posted May 24, 2014 Share Posted May 24, 2014 I'm not sure, most of us don't go that way. Check your local forum and ask around there. 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...
BoozeRS05 Posted May 24, 2014 Share Posted May 24, 2014 There's a guy in the classifieds that sells assembled motors. Has a good rep from what I've seen. Edit: wait maybe he only sells SBs, idk. EB's Subaru journal - 2005 LegacyGT Wagon & 2014 Forester FB25 (2008 specB - RIP) IG@legacygtliving Link to comment Share on other sites More sharing options...
Xplosivo1 Posted May 24, 2014 Share Posted May 24, 2014 You won't find one cheaper than this. He's got a great reputation here as well as on NASIOC. http://legacygt.com/forums/showthread.php/fl-fresh-703-series-ej257-short-block-224040.html Link to comment Share on other sites More sharing options...
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