SBT Posted October 11, 2012 Share Posted October 11, 2012 How many miles on it? Sounds like a fouled injector (1 or all) - Pro amore Dei et patriam et populum - Link to comment Share on other sites More sharing options...
chaz517 Posted October 11, 2012 Share Posted October 11, 2012 71000... my fuel volitility was 2.5 when i guess it should be 9.0 according to them, and there was 15% alcohol in the gas when there should be no more than 10% i guess. who knows. like i said, its been filled up 3 times now, most recently with sunoco gas 93... so depressing Link to comment Share on other sites More sharing options...
chaz517 Posted October 11, 2012 Share Posted October 11, 2012 idle is perfect for the record, if that helps. what do u suggest i do at this point? Link to comment Share on other sites More sharing options...
SBT Posted October 11, 2012 Share Posted October 11, 2012 Are you logging? - Pro amore Dei et patriam et populum - Link to comment Share on other sites More sharing options...
chaz517 Posted October 11, 2012 Share Posted October 11, 2012 have nothing to log with, guess i should get a vag com asap? nothing come up on ebay when I search for it of course.. siiigh lol Link to comment Share on other sites More sharing options...
SBT Posted October 11, 2012 Share Posted October 11, 2012 Also, check all of your vacuum lines, especially the blue T-connector under the intercooler. If idle is smooth, then I'd check every line, end-to-end for leaks. Zip-tie everything. - Pro amore Dei et patriam et populum - Link to comment Share on other sites More sharing options...
chaz517 Posted October 11, 2012 Share Posted October 11, 2012 ok will do, i appreciate this help, seriously. whats the best way to check for leaks? just visually going to be enough to tell? Link to comment Share on other sites More sharing options...
chaz517 Posted October 11, 2012 Share Posted October 11, 2012 also, previous owner had the sti performance gauge pack installed, w the boost gauge, and oil pressure and oil temp, maybe there is a leak there somewhrre? Link to comment Share on other sites More sharing options...
SBT Posted October 11, 2012 Share Posted October 11, 2012 ^ That just adds more potential "leak" areas. On my STI gauge pack, the boost gauge runs off of a tee in the BPV line, to the boost gauge sender (on the driver's-side strut tower under the brake cylinder) so that's four possible leak areas, besides the sender itself. Check everything you can find, including your Turbo Inlet Hose, and your TMIC to TB Hose. - Pro amore Dei et patriam et populum - Link to comment Share on other sites More sharing options...
chaz517 Posted October 11, 2012 Share Posted October 11, 2012 Also, check all of your vacuum lines, especially the blue T-connector under the intercooler. If idle is smooth, then I'd check every line, end-to-end for leaks. Zip-tie everything. Do I need to remove the intercooler to expose this blue tee? There was a blue tee coming off the stock bov, thats where the boost gauge was teed in to. Im not sure if the previous owner just happend to use a blue tee.. I zipped tied those up so far, haven't driven it since then since I'm.at.work Thanks again x1000 seriously Link to comment Share on other sites More sharing options...
SBT Posted October 11, 2012 Share Posted October 11, 2012 Pull the intercooler and check everything in around and underneath it. There's several lines there, including the blue (might be black too) Tee that's forward of the IC and below the BPV return line attached to the back of the IM. Make sure you get your IC fully seated and tightened when you button everything back up. - Pro amore Dei et patriam et populum - Link to comment Share on other sites More sharing options...
chaz517 Posted October 12, 2012 Share Posted October 12, 2012 Got the system pressure tested, and it turns out there was a large boost leak coming from the throttle body hose that connects to the intercooler. It was Also.causing an.oil leak as well.according to the tuning shop. I havent driven it yet, but i sure hope this fixed this issue. U woould think a leak.like that would throw some.sort of cel but i guess not. Thanks so much for the help. Link to comment Share on other sites More sharing options...
SBT Posted October 12, 2012 Share Posted October 12, 2012 ^ Most common leak IMO, after the blue tee one. - Pro amore Dei et patriam et populum - Link to comment Share on other sites More sharing options...
chaz517 Posted October 13, 2012 Share Posted October 13, 2012 Problem fixed woo hooooooooop. Just has the random slight hesitation like others stated in this thread, hope to get that tuned out shortly. Thanks again to all Link to comment Share on other sites More sharing options...
mattwear Posted June 14, 2016 Share Posted June 14, 2016 Not sure whether my problem is related but I've been putting up with my 05 standard legacy stuttering and stammering at low revs now for around two years. I've had my local mechanic look for faults and we've never been able to locate the problem. This morning I pulled and checked a few fuses for a seemingly unrelated problem - the window washer was not working. The washer is now working again just from pulling and reseating fuses. I also pulled a couple of other random fuses under the bonnet without the ignition on. After all this the stammering problem seems to have disappeared but the engine wouldn't idle correctly and would cut out. My thinking is that in pulling the fuses I inadvertently reset the onboard computer which may have over time learned some bad engine management behaviors causing the low rev stammering. And by resetting the computer it's cleared it. I have since left the car idling to relearned its idle revs, and the low rev stammering problem is still fixed. Eureka! Just chatted to my mechanic and the "standard procedure" for resetting the onboard computer is to pull the battery terminals off and touch the cables together. I'm not a tech or mechanic so do not do this unless it can be verified. [edit: according to a reply to this post in another thread be aware touching the battery cables could fry your electronics. Again, needs verification.] Link to comment Share on other sites More sharing options...
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