drakepeterdrake Posted March 19, 2014 Share Posted March 19, 2014 My car had 103k miles on it. Always properly maintained, adult-driven (we bought our son an old Volvo...) New timing belt 1 month ago. Car runs great except that the idle, which was never butter-smooth to begin with, has been getting rougher and rougher over the past year or so. It doesn't surge or stall, just kind of lumpy when stopped at a light. Does not improve much once engine has reached operating temperature. Running premium gas, of course. Gas mileage is about the same as always - averages about 18mpg. Thanks. P Link to comment Share on other sites More sharing options...
robinlsb Posted March 19, 2014 Share Posted March 19, 2014 My car had 103k miles on it. Always properly maintained, adult-driven (we bought our son an old Volvo...) New timing belt 1 month ago. Car runs great except that the idle, which was never butter-smooth to begin with, has been getting rougher and rougher over the past year or so. It doesn't surge or stall, just kind of lumpy when stopped at a light. Does not improve much once engine has reached operating temperature. Running premium gas, of course. Gas mileage is about the same as always - averages about 18mpg. Thanks. P When was the last time the injectors were "cleaned" Have you checked all hoses? "Belief does not make truth. Evidence makes truth. And belief does not make evidence." Link to comment Share on other sites More sharing options...
discojon Posted March 19, 2014 Share Posted March 19, 2014 If you have access to a obd-II cable and a laptop, pull a Learning View. That will rule out or confirm fueling / vacuum leak issues. http://www.romraider.com/forum/viewtopic.php?f=33&t=7202 If that checks out, I'd do a compression test. I'll bet you have low compression on one cylinder Link to comment Share on other sites More sharing options...
Max Capacity Posted March 19, 2014 Share Posted March 19, 2014 Have the o-rings between the intake manifold and TGV's been replaced with the new larger orange one's ? Most of the time that's the issue. Is this all the time or just when it's cold out ? If the car has been stock all these years, the next guess is burnt valves in #2 or #4 cylinder. 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...
drakepeterdrake Posted March 19, 2014 Author Share Posted March 19, 2014 Thank you for all these suggestions. I'll discuss them with the mechanic. Peter Link to comment Share on other sites More sharing options...
TC525 Posted April 1, 2014 Share Posted April 1, 2014 Hey, any update on this one? My stock '06 with 136K miles is having the same issue, and I have been getting a #2 misfire CEL which the dealer can't seem to fix. They replaced the injector, that didn't solve the problem, and now they are thinking engine rebuild, because of bad o-rings, valves, etc. Also, they did a leak down test which read at 15. Subaru says anything over a 7 is bad. Thanks, Link to comment Share on other sites More sharing options...
drakepeterdrake Posted April 2, 2014 Author Share Posted April 2, 2014 Hi, No real update yet. I put Techron cleaner in the tank, will run it and see if that cleans the injectors. P Link to comment Share on other sites More sharing options...
__raj Posted April 2, 2014 Share Posted April 2, 2014 Mine is too but no CEL. Link to comment Share on other sites More sharing options...
Max Capacity Posted April 2, 2014 Share Posted April 2, 2014 Have you cleaned the MAF yet with MAF cleaner ? 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...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.