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- 2008 Mazda5 GT
I’ve had this random and somewhat phantom shake/rattle at idle (only when in gear) a short while back. I assumed it may be due to my stiffer eFocus RMM but the randomness (b/c it doesn’t shake/rattle all of the time) leads me to believe otherwise. It hasn’t really bother me much b/c the car has been a loaner. Well, car’s back and it makes it feel like a piece of crap – unacceptable.
I noticed the idle seems a little off. At full stop, idle drop ever so slightly by ~50-100 rpms. This seems to correlate with when it shakes/rattles. I cleaned the TB this past summer and relearn/calibrate it. I should redo this to check.
Considering the age/mileage (’08, 85K) of the car, I suspect the PCV is starting to get gummed up. Thoughts before I dive into this too recklessly? Anyone here replace their PCV? Quick search didn’t come up with much from past Mz5 owners. From the Mz3 world, looks a like tedious process of taking off the intake manifold to get access… Can it be done from bottom up?
It could also be a vaccum leak but I hate chasing this.
More I think about it, seems more like a vaccum issue since the car is under more load when idling in gear.
I noticed the idle seems a little off. At full stop, idle drop ever so slightly by ~50-100 rpms. This seems to correlate with when it shakes/rattles. I cleaned the TB this past summer and relearn/calibrate it. I should redo this to check.
Considering the age/mileage (’08, 85K) of the car, I suspect the PCV is starting to get gummed up. Thoughts before I dive into this too recklessly? Anyone here replace their PCV? Quick search didn’t come up with much from past Mz5 owners. From the Mz3 world, looks a like tedious process of taking off the intake manifold to get access… Can it be done from bottom up?
It could also be a vaccum leak but I hate chasing this.
More I think about it, seems more like a vaccum issue since the car is under more load when idling in gear.
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