ScoobyGT15 Posted November 14, 2013 Share Posted November 14, 2013 I swear this car is starting to fall apart on me. Recently my car has developed a low idle and has gotten to the point of stalling when first moving it. It seems to be getting worse as it gets colder outside. Today it threw a cel for bank 2 running too rich. I have an aftermarket intake and exhaust and the car has 125000 miles on it. Been reading a few threads on here trying to narrow down what it can be but i don't really know where to go with this. Any ideas of what this could be? It only seems to stall the first time you stop after starting the car but when it warms up and drives for a little that goes away. It still has a rough idle and I can feel the shake inside the car. Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
ScoobyGT15 Posted November 14, 2013 Author Share Posted November 14, 2013 Also has an accessport with a stage 1 tune Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
JmP6889928 Posted November 14, 2013 Share Posted November 14, 2013 Read this thread and try the Berryman Chemtool B12. http://legacygt.com/forums/showthread.php/fuel-additives-do-youi-if-so-recommendationsi-215679.html Link to comment Share on other sites More sharing options...
ehsnils Posted November 14, 2013 Share Posted November 14, 2013 Look for air leaks, especially around bank 1, and do a data log to see what figures you have. Also clean MAF, make sure the PCV works and that the intake area is clean - fresh air filter among other things. It can also be a bad O2 or MAF sensor, but without a data log it's hard to determine. When you did get the CEL - did you get Freeze Frame data too? That can also provide some additional info. Link to comment Share on other sites More sharing options...
gear_monkey Posted November 15, 2013 Share Posted November 15, 2013 Have you checked all your vacuum lines? The near stall idle and too rich CEL is prime indicators of a vac line that has popped off. Link to comment Share on other sites More sharing options...
iNVAR Posted November 15, 2013 Share Posted November 15, 2013 aftermarket intake + accessport do not make a happy car. Link to comment Share on other sites More sharing options...
Strizzy Posted November 15, 2013 Share Posted November 15, 2013 Is it only when the engine is cold? How is it when it is up to temp? Check your intake manifold gaskets. They are orange rubber o-rings. My bad luck build Link to comment Share on other sites More sharing options...
Max Capacity Posted November 15, 2013 Share Posted November 15, 2013 If you haven't replaced the black o-rings with the orange ones like he ^ said do that first. Then bank 2 may be a rear O2 sensor issue. What was the CEL code ? 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...
ScoobyGT15 Posted November 16, 2013 Author Share Posted November 16, 2013 Look for air leaks, especially around bank 1, and do a data log to see what figures you have. Also clean MAF, make sure the PCV works and that the intake area is clean - fresh air filter among other things. It can also be a bad O2 or MAF sensor, but without a data log it's hard to determine. When you did get the CEL - did you get Freeze Frame data too? That can also provide some additional info. When I do the data log what exactly should I be looking at? And what range should I be in. Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
ScoobyGT15 Posted November 16, 2013 Author Share Posted November 16, 2013 Have you checked all your vacuum lines? The near stall idle and too rich CEL is prime indicators of a vac line that has popped off. I don't think it's a vacuum line because it doesn't do it all the time. Only when it's colder then 40 or so. Warmer then that and it's completely fine Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
ScoobyGT15 Posted November 16, 2013 Author Share Posted November 16, 2013 Is it only when the engine is cold? How is it when it is up to temp? Check your intake manifold gaskets. They are orange rubber o-rings. Yes it's only when I first get moving and then stop. Once the car gets warm and to normal operating temperature it's completely fine Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Strizzy Posted November 16, 2013 Share Posted November 16, 2013 http://legacygt.com/forums/showthread.php/diy-rough-idle-cold-start-cold-temps-lgt-07-09-155325.html My bad luck build Link to comment Share on other sites More sharing options...
ehsnils Posted November 16, 2013 Share Posted November 16, 2013 When I do the data log what exactly should I be looking at? And what range should I be in. Sent from my iPhone using Tapatalk Do the log - look at the tuning section, include both O2 sensors, MAF, MAP, throttle position, rpm etc. Post it here. But check the manifold seals, they are definitely suspect items at this stage. Link to comment Share on other sites More sharing options...
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