Refuge Posted June 18, 2012 Share Posted June 18, 2012 140 K GT Leggy The problem is in the title. I cleaned the MAF and its sensor from carbon buildup. What else could be causing this? I glanced and didnt see any vacuum leaks. Apparently you can spray starter fluid around the hoses and if it revs it means there is your leak. Is the turbo giving up? Isnt there a way to check it without getting too deep in? Maybe looking to se if it is blowing oil somewhere it aint supposed to. Otherwise its shop-time Link to comment Share on other sites More sharing options...
bmx045 Posted June 18, 2012 Share Posted June 18, 2012 I'm not quite sure how carbon could build up on the maf sensor, but I hear what you're saying. is it misfiring? any codes? might be a bad vac leak somewhere, do the starter fluid trick around the intercooler and inlet. Link to comment Share on other sites More sharing options...
Max Capacity Posted June 18, 2012 Share Posted June 18, 2012 A lot of us have learned that the o-rings between the intake manifold and TVG's will leak over time. I replaced mine last May. Because of low idle and stalling when it was cold out. When you see the new o-rings next to the old ones, you'll understand. My car had about the same miles your has when I did this. It is a job you can do yourself if you'd like to. 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...
Refuge Posted July 12, 2012 Author Share Posted July 12, 2012 Do I need to put any lubes on the o rings? Link to comment Share on other sites More sharing options...
Max Capacity Posted July 12, 2012 Share Posted July 12, 2012 No, they just sit in the grove. When you see the new ones next to the old ones you'll understand why the old ones suck. 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...
Later_rex Posted July 13, 2012 Share Posted July 13, 2012 my car does this too i heard it could be spark plugs? Link to comment Share on other sites More sharing options...
rob-2 Posted July 13, 2012 Share Posted July 13, 2012 A lot of us have learned that the o-rings between the intake manifold and TVG's will leak over time. I replaced mine last May. Because of low idle and stalling when it was cold out. When you see the new o-rings next to the old ones, you'll understand. My car had about the same miles your has when I did this. It is a job you can do yourself if you'd like to. Is there a DIY for these o-rings? Link to comment Share on other sites More sharing options...
gr4v3r Posted July 13, 2012 Share Posted July 13, 2012 is it possible that its the heat? I had a rough idle, dropping to 200 as well, but it went away after it got a little cooler. This is just a guess on my part so dont take what I'm saying for fact, hopefully someone more knowledgeable can help us both. Link to comment Share on other sites More sharing options...
Refuge Posted July 13, 2012 Author Share Posted July 13, 2012 Is there a DIY for these o-rings? I havent seen one and I am preparing to do it. Link to comment Share on other sites More sharing options...
solidkevlar Posted July 13, 2012 Share Posted July 13, 2012 my car did this but then got worse over time ended up being the valve in #2 needed to be shimed Link to comment Share on other sites More sharing options...
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