I’m not on any Mazda forums so I'm just sticking it out there to see if anyone has any knowledge of this issue, or access to Identifix and is curious enough to look it up.
I have a 2017 Mazda 6 2.5 skyactiv direct injected.
I’m sure it’s due for valve cleaning, although Mazdas supposedly don’t gunk up the valves even with gdi due to some magic they work in the heads and air velocity and temps or whatever. Regardless, valve cleaning has not been done.
115k on odometer. 5k religious oil changes since new (I’m original owner). It doesn’t use any oil. Clean the throttle body and replace the engine air filter around every 15k. Run Costco top tier almost every fill up, I’d say 90% of the time. Plugs replaced with the same exact as oem at 100k just for maintenance (I wasn’t aware they call for them at 75 or 80k or whatever it is). Old plugs looked fine, nothing alarming at all. It was doing this hard start at times then too I remember, and I had hoped it was because I ran over the plug interval. They are not from Mazda (they are from RockAuto).
I drive it pretty easily, an easy 25-30 mile commute. But I make sure at least once every couple days I pull it hard up a long hill or wind it out getting on the highway where it can stay wot for awhile.
For the last couple years, after it’s been on a drive, shut down for a short period of time, anywhere from minutes to an hour or three, it sometimes starts funny. Like it doesn’t crank the normal length of time (shorter) it fires and stumbles a bit, idles low, then clears up. Never had a check engine light. I’ve never scanned it to see if anything is pending and never watched any kind of data. It’s just finally getting bad enough now that I’m going to look into it (maybe). Yesterday after it sat about 3 hours it started like this again but actually stalled. Second start was perfectly fine.
I suspect a leaking injector, but I’m not overly familiar with direct injection and not familiar with Mazda at all as far as their issues.
I suppose it could be dirty valves somehow absorbing the fuel, but I feel like that’s a little more far fetched.
Any experience or knowledge of any common issues with these engines? And this hard re-starting issue? Or if someone is curious and nice enough to explore Identifix, I’d imagine someone has posted about this on one of the same engines throughout the Mazda models.
I have a 2017 Mazda 6 2.5 skyactiv direct injected.
I’m sure it’s due for valve cleaning, although Mazdas supposedly don’t gunk up the valves even with gdi due to some magic they work in the heads and air velocity and temps or whatever. Regardless, valve cleaning has not been done.
115k on odometer. 5k religious oil changes since new (I’m original owner). It doesn’t use any oil. Clean the throttle body and replace the engine air filter around every 15k. Run Costco top tier almost every fill up, I’d say 90% of the time. Plugs replaced with the same exact as oem at 100k just for maintenance (I wasn’t aware they call for them at 75 or 80k or whatever it is). Old plugs looked fine, nothing alarming at all. It was doing this hard start at times then too I remember, and I had hoped it was because I ran over the plug interval. They are not from Mazda (they are from RockAuto).
I drive it pretty easily, an easy 25-30 mile commute. But I make sure at least once every couple days I pull it hard up a long hill or wind it out getting on the highway where it can stay wot for awhile.
For the last couple years, after it’s been on a drive, shut down for a short period of time, anywhere from minutes to an hour or three, it sometimes starts funny. Like it doesn’t crank the normal length of time (shorter) it fires and stumbles a bit, idles low, then clears up. Never had a check engine light. I’ve never scanned it to see if anything is pending and never watched any kind of data. It’s just finally getting bad enough now that I’m going to look into it (maybe). Yesterday after it sat about 3 hours it started like this again but actually stalled. Second start was perfectly fine.
I suspect a leaking injector, but I’m not overly familiar with direct injection and not familiar with Mazda at all as far as their issues.
I suppose it could be dirty valves somehow absorbing the fuel, but I feel like that’s a little more far fetched.
Any experience or knowledge of any common issues with these engines? And this hard re-starting issue? Or if someone is curious and nice enough to explore Identifix, I’d imagine someone has posted about this on one of the same engines throughout the Mazda models.
Last edited by a moderator:
