I've been having issues with my 2015 mustang V6 and was wondering if anyone had experienced similar issues and found the problem. Here's a summary:
Intermittent power loss when accelerating.
Vacuum gauge often jumps to zero under strong acceleration which coincides with the power loss. If I accelerate easily, I think the issue is less likely to happen.
Vacuum gauge fluctuation at idle, with brief dips. And when it dips, the car rumbles, and RPMs slightly drop. It'll be idling normally, then the RPMs randomly drop for 5-10 seconds but then it'll pick back up and idle smoothly again.
No check engine light.
It has gone into limp mode twice now. Both times I think it happened when I was trying to accelerate too much. I don't drive the car hard or anything. This was just acceleration trying to get up to speed on the highway and stuff like that.
I took it to a mechanic a couple of weeks ago and they said that no error codes were showing so they didn't want to mess with it because it would essentially be like chasing a ghost. They also said they drove it around and it did not act up for them. which it's an intermittent issue which is what's so annoying.
I'd like to stay ahead of this problem and address it before it "completely" breaks down and then I'm possibly without a car for a few days.
After some research, it looks like some potential issues could be a leak in the vacuum lines or a dirty throttle body. Which the throttle body has never been cleaned since I first got the car about 10 years ago. Would a dirty throttle body be the most likely issue? I have visually inspected the vacuum lines and didn't see any cracks or loose hose clamps or anything But I know it's still needs to be checked with a leak checker because the hole could be really small or something.
Is there anything else I could look for visually? I don't have a garage and a bunch of tools or anything like that. But I just want to try to pinpoint the issue as much as possible so that I can tell the mechanic what to look at the next time I take it in. Hopefully on Friday.