hershizzle Posted May 6, 2021 Share Posted May 6, 2021 Good morning! I'd like to start off by thanking everyone for their posts in here. Ive been lurking this forum for the past two weeks trying to get a better understanding of my vehicle and what options I have for modding it a bit. About 3 weeks ago I purchased a 2018 Legacy 3.6R. It has just under 50K on it. I've never owned a Subaru before and fell in love with this car. It is beautiful and smooth to drive. Eyesight is also great! At first I thought it was the CVT and it might still be part of what I'm feeling but when I'm driving and the engine isn't fully warmed the car feels like it's studdering while accelerating. It's hard to explain, kind of a rubber band feel. This morning while I was waiting for the car to warm up while going to work I decided to rev the engine while it was cold and the engine shook pretty badly. It shook the entire vehicle. It has always had a small rough idle while cold. Things I have done to the car since I've gotten it: -Cleaned the throttle body -replaced the spark plugs with ngk iridium lasers -replaced pcv valve -replaced serpentine belt -replaced both rear shock absorbers (passenger side was leaking) -replaced OEM battery -cleaned MAF sensor -changed conventional oil to synthetic with new oil filter -installed new air filter Is the rough idle while cold a normal thing for these engines? I did not purchase a warranty for this vehicle, the dealer warranty ends in July. Curious if this should warrant a shop visit. When I arrived to work this morning I revved the engine in park and there was no engine shake. Thanks for reading. Link to comment Share on other sites More sharing options...
Grnlantern1 Posted May 6, 2021 Share Posted May 6, 2021 Good morning! I'd like to start off by thanking everyone for their posts in here. Ive been lurking this forum for the past two weeks trying to get a better understanding of my vehicle and what options I have for modding it a bit. About 3 weeks ago I purchased a 2018 Legacy 3.6R. It has just under 50K on it. I've never owned a Subaru before and fell in love with this car. It is beautiful and smooth to drive. Eyesight is also great! At first I thought it was the CVT and it might still be part of what I'm feeling but when I'm driving and the engine isn't fully warmed the car feels like it's studdering while accelerating. It's hard to explain, kind of a rubber band feel. This morning while I was waiting for the car to warm up while going to work I decided to rev the engine while it was cold and the engine shook pretty badly. It shook the entire vehicle. It has always had a small rough idle while cold. Things I have done to the car since I've gotten it: -Cleaned the throttle body -replaced the spark plugs with ngk iridium lasers -replaced pcv valve -replaced serpentine belt -replaced both rear shock absorbers (passenger side was leaking) -replaced OEM battery -cleaned MAF sensor -changed conventional oil to synthetic with new oil filter -installed new air filter Is the rough idle while cold a normal thing for these engines? I did not purchase a warranty for this vehicle, the dealer warranty ends in July. Curious if this should warrant a shop visit. When I arrived to work this morning I revved the engine in park and there was no engine shake. Thanks for reading.Could be some Bad Gas or Dirty Injectors run some Lucas Injector Fuel System Cleaner through it on your next fill up and use Super.. I consistantly run 89 Octane in my 3.6r since I bought it New in 15' every now n then I use 91.. Good Luck Keep us Posted.. Sent from my SM-G988U using Tapatalk Link to comment Share on other sites More sharing options...
ammcinnis Posted May 6, 2021 Share Posted May 6, 2021 ... I decided to rev the engine while it was cold ... Bad idea, for any car. At least let the engine get fully up to temperature first. "If you don't know where you're going, any road will take you there." ~ The Cheshire Cat (Alice in Wonderland) Link to comment Share on other sites More sharing options...
hershizzle Posted May 6, 2021 Author Share Posted May 6, 2021 Bad idea, for any car. At least let the engine get fully up to temperature first. Noted! Thanks for the advice. Link to comment Share on other sites More sharing options...
Beamercub Posted May 31, 2021 Share Posted May 31, 2021 No warranty? Uh-oh. Link to comment Share on other sites More sharing options...
phuzaxeman Posted June 2, 2021 Share Posted June 2, 2021 I would have the subaru dealer look at the vehicle just in case there's anything that shows up. It's best to wait a little bit for the car to get warm. Link to comment Share on other sites More sharing options...
Beamercub Posted June 3, 2021 Share Posted June 3, 2021 Food for thought... You mentioned buying the car with 50k miles on it.. Past the factory warranty... I would be questioning if the previous owner had leased the car and went over the allocated mileage.. Or, if they bought it and didn't purchase the extended warranty within the allowed time frame.. From what you replaced already, makes me think it was not a certified vehicle. The CVT is covered either way, but knowing a bit of history could paint a clearer picture. What you described happening is not normal and shouldn't happen , possibly a motor mount? Was the vehicle doing the symptom before replacing all that stuff? Link to comment Share on other sites More sharing options...
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