shumax Posted August 3, 2020 Report Share Posted August 3, 2020 2.7 Ecoboost (31k) with engine replaced due to oil consumption about 8-10k ago. At highways speeds - above 65mph, in top gear, it is stumbling and missing. No CEL. You can see the tach jump up and down about 3-400rpm as it happens and the car shakes, too. I always run top tier 93 octane in it, so that's not the issue, either. Anyone have any experience with this? It's going into the dealership Thursday for a suspension clunk, too, so will have them sort this then. Just looking to see what others' may have experienced. Thanks, Shumax Quote Link to comment Share on other sites More sharing options...
WWWPerfA_ZN0W Posted August 3, 2020 Report Share Posted August 3, 2020 possible torque converter lockup issue? checked transmission fluid level and condition? any leaks at the TC housing? Quote Link to comment Share on other sites More sharing options...
THE_BOLT Posted August 3, 2020 Report Share Posted August 3, 2020 Has that been happening since the engine was replaced? Quote Link to comment Share on other sites More sharing options...
shumax Posted August 4, 2020 Author Report Share Posted August 4, 2020 I just noticed it today, for the first time; though, I don't drive the car much - it's my wife's. She mentioned she's not noticed it. I took it for another drive this evening and it didn't do it. So, I'm not sure what to make of it now. Quote Link to comment Share on other sites More sharing options...
onyxbfly Posted August 4, 2020 Report Share Posted August 4, 2020 Next time it happens try to catch it on video. If I'ts not throwing any codes, the dealer may not be inclined to believe you. Quote Link to comment Share on other sites More sharing options...
shumax Posted August 8, 2020 Author Report Share Posted August 8, 2020 I drove it again, to the dealer, and never got it to do it again. They drove it and said they couldn't, either. Mentioned there were no codes stored on it, either. So, nothing has been done to it. They tried to tell me it could be the start of a bad MAF, etc. I like this dealer a lot, so I think they were just trying to give me "something" to go with. Regardless, it didn't do it the entire way home and my wife said it was fine yesterday as she drove it. So, I think I'll let it be until it comes back and gets worse...? 1 Quote Link to comment Share on other sites More sharing options...
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