Max Capacity Posted January 30, 2013 Share Posted January 30, 2013 sounds like im gaskets. do the carb cleaner only when the car is symptomatic If you have not replaced them yet, after being on here for how long... You should suspect that first. 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...
xt2005bonbon Posted January 30, 2013 Author Share Posted January 30, 2013 If you have not replaced them yet, after being on here for how long... You should suspect that first. Yeah, I know...But remember that I am on the other side of the pond right now without a garage, and readily available parts for my car. So it's a bit more difficult for me . Link to comment Share on other sites More sharing options...
xt2005bonbon Posted February 11, 2013 Author Share Posted February 11, 2013 update: waiting for IM gaskets to be shipped to me with a new air filter. FINALLY found a shop that will do a compression / leak down tests next week. FYI, got a misfire on #2 last week when fully warmed up while idling at a traffic light. This happened right after hitting a bit of boost in second. So now, got 2 misfires (2 and 4). First time on 2. I am no longer driving the car in fear of destroying it, even though it still runs somewhat OK. For now, thinking of checking OCV on driver side and clean it as well; plus do the carb cleaner test on IM gasket area. Never hurts.. Once I receive the gaskets, will install them, install new air filter, and clean MAF. Link to comment Share on other sites More sharing options...
xt2005bonbon Posted February 13, 2013 Author Share Posted February 13, 2013 interesting piece of info... Link to comment Share on other sites More sharing options...
xt2005bonbon Posted February 20, 2013 Author Share Posted February 20, 2013 Update: 1. new paper air filter installed 2. cleaned MAF 3. leak down test result: 10% leak on #4 through piston ring. Mechanic says it is within spec and is therefore OK. So he thinks that valves probably need adjustments . 4. Still getting misfire on #4. Has occurred either cold or warm, at idle, and even at higher rpm under load. They did not do any compression test. Felt it was unnecessary. What do you guys think of their diagnosis? Reminder: I have new spark plugs, injector, and swapped coils. Link to comment Share on other sites More sharing options...
Indiglow Posted February 20, 2013 Share Posted February 20, 2013 10% is cutting it close. Questionable. If you swapped injectors, coils, and plugs. that doesn't leave much left. the reason to do a leakdown is to determine the origin of the leak. they said themselves it was piston leaking(listening while the leak occurs with your ear to the oil fill cap), yet they're saying it could be a valve issue. well if they did the test correctly, they'd listen in the throttle body if it was leaking via the intake valves, and listen in the exhaust ports if it was an exhaust valve issue(after dropping the exh manifold). see what I'm saying? Link to comment Share on other sites More sharing options...
xt2005bonbon Posted February 20, 2013 Author Share Posted February 20, 2013 Yeah. I did specifically asked him if he did listen for air leaks at the exhaust, throttle body, and oil cap. The leak came from the oil cap. He thought 10% is just fine. So he thought the issue comes from valves being out of specs. So I was like . To his defense though, I did get a busted TB tensioner while driving 10000 miles ago. Car ran OK after the fix, so who knows. Link to comment Share on other sites More sharing options...
Indiglow Posted February 20, 2013 Share Posted February 20, 2013 it's questionable. 10% is pretty close to the limit. Might as well do a compression test on that cyl to see what that leak percentage yields in psi during compression stroke. Link to comment Share on other sites More sharing options...
xt2005bonbon Posted February 20, 2013 Author Share Posted February 20, 2013 it's questionable. 10% is pretty close to the limit. Might as well do a compression test on that cyl to see what that leak percentage yields in psi during compression stroke. That is exactly my plan. Next week, I'll get a compression test with another guy. That other guy also feels like re-making sure that ignition is in good working order. Soooo, more waiting and no driving Link to comment Share on other sites More sharing options...
Indiglow Posted February 20, 2013 Share Posted February 20, 2013 It's what makes a Subaru, a Subaru! Link to comment Share on other sites More sharing options...
xt2005bonbon Posted February 20, 2013 Author Share Posted February 20, 2013 It's what makes a Subaru, a Subaru! Link to comment Share on other sites More sharing options...
06silvarubiLGT Posted February 20, 2013 Share Posted February 20, 2013 ^agreed Link to comment Share on other sites More sharing options...
xt2005bonbon Posted February 20, 2013 Author Share Posted February 20, 2013 Forgot to mention that my other plan is to do an LV on my car. I've never done one so we shall see... Waiting to receive my VAGCOM cable first.. Link to comment Share on other sites More sharing options...
xt2005bonbon Posted February 20, 2013 Author Share Posted February 20, 2013 Maybe I should throw this question as well: Assume that the compression test yields poor results on #4. Would that mean that you can rule out valves since leak down test said 10% loss through rings? Link to comment Share on other sites More sharing options...
Indiglow Posted February 20, 2013 Share Posted February 20, 2013 yes, either way, you need to tear the block down and check the valve lash on the heads while you're replacing the pistons Link to comment Share on other sites More sharing options...
xt2005bonbon Posted February 20, 2013 Author Share Posted February 20, 2013 Yeah. How about if the compression turns out good (which I doubt) ? What would that mean then? Would the garage conclusions be right then? Link to comment Share on other sites More sharing options...
Indiglow Posted February 20, 2013 Share Posted February 20, 2013 If compression is good and you still have misfires then there is something deeper going on for that cyl, like fuel rail issue, wiring harness issue etc... Coil pack connector...weird shit like that Link to comment Share on other sites More sharing options...
xt2005bonbon Posted February 20, 2013 Author Share Posted February 20, 2013 Then, from what you say I should hope for good compression; in which case I would not need to worry about the valves and will have to troubleshoot fuel and ignition related items. Fun. Link to comment Share on other sites More sharing options...
Indiglow Posted February 20, 2013 Share Posted February 20, 2013 Seeing as it's cyl 4. Its probably something compression related Link to comment Share on other sites More sharing options...
xt2005bonbon Posted February 20, 2013 Author Share Posted February 20, 2013 Seeing as it's cyl 4. Its probably something compression related I unfortunately have to agree. Although I don't want to. Link to comment Share on other sites More sharing options...
xt2005bonbon Posted February 25, 2013 Author Share Posted February 25, 2013 awaiting for compression results as I write, suspense is killing me . On another note, I'd like to bump the following troubleshooting steps I previously posted. Has anyone really tried this? http://legacygt.com/forums/attachment.php?attachmentid=142006&d=1360796895 Link to comment Share on other sites More sharing options...
06silvarubiLGT Posted February 25, 2013 Share Posted February 25, 2013 I will be doing mine tomorrow... too bad you weren't closer we could have gone through all this sh*t together.. lol.. GLWDiag Since its in the SM Im guessing it works to a certain extent, just doesn't pinpoint failure to actual cylinder location. Leakdown and compression will narrow it down, other than that this might be good enough for me.. Link to comment Share on other sites More sharing options...
xt2005bonbon Posted February 25, 2013 Author Share Posted February 25, 2013 I will be doing mine tomorrow... too bad you weren't closer we could have gone through all this sh*t together.. lol.. GLWDiag That would have been nice.. Link to comment Share on other sites More sharing options...
06silvarubiLGT Posted February 25, 2013 Share Posted February 25, 2013 broad definition of "fun" anyway... Link to comment Share on other sites More sharing options...
xt2005bonbon Posted February 25, 2013 Author Share Posted February 25, 2013 Like getting moral support in case we both get crappy results. Post fixed. Link to comment Share on other sites More sharing options...
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