Cowinthefog
Member
I have had this happen twice in the past month. It runs super rough right at start up. Shut down, restart, better. Third time, back to normal. No codes, only the Restricted performance notification which went away the third start. Then normal. Nothing to report.
Today, almost same exact sequence except for the random misfire code set along with misfire codes for 2, 4, 6 and 8 all at the same time with as near as I can tell, identical freeze frame data, which looked about as normal as I've ever seen it. MAF numbers looked same as when it ran fine, all fuel trims near zero, voltages near 14, fuel pressure good.
It's a daily driver and has been smooth, and gotten between 15-19 mpg.
The only thing I can think of might be the timing chains beginning to stretch. However, there have never been cam, crank or any other correlation codes and after the 3rd start each time it apparently self corrected. If bank 2 did slip a tooth, can the system correct for this, potentially twice? Meaning it slips, runs terribly, the system sees it, corrects itself and by the 3rd start it has self adjusted, and now having done it twice there is no wiggle-room left and I'd better better fix it? It still sounds good at idle right now so there seems to be no damage.
I've just resurrected my 2011 RRS with the same powertrain, so I'm relatively familiar with the system and will do the work, but haven't seen these symptoms yet.
Josh
Today, almost same exact sequence except for the random misfire code set along with misfire codes for 2, 4, 6 and 8 all at the same time with as near as I can tell, identical freeze frame data, which looked about as normal as I've ever seen it. MAF numbers looked same as when it ran fine, all fuel trims near zero, voltages near 14, fuel pressure good.
It's a daily driver and has been smooth, and gotten between 15-19 mpg.
The only thing I can think of might be the timing chains beginning to stretch. However, there have never been cam, crank or any other correlation codes and after the 3rd start each time it apparently self corrected. If bank 2 did slip a tooth, can the system correct for this, potentially twice? Meaning it slips, runs terribly, the system sees it, corrects itself and by the 3rd start it has self adjusted, and now having done it twice there is no wiggle-room left and I'd better better fix it? It still sounds good at idle right now so there seems to be no damage.
I've just resurrected my 2011 RRS with the same powertrain, so I'm relatively familiar with the system and will do the work, but haven't seen these symptoms yet.
Josh
