Topped off oil, took for test drive and car is abnormally sluggish.

nis350 · 08-01-2016, 11:57 AM

so how much did you overfill exactly and curious as to why it impacted the idle speed?

Quote:

Originally Posted by TreeSemdyZee

Overfilling will definitely cause huge issues.
I overfilled mine earlier this year and caused major problems. It would not idle correctly and after a serious idle issue the idle reset itself to about 1100 rpm.
I let the car drain for an extended period of time to try and clear the air bubbles caused by the overfill. When I drained the oil, there were a LOT of air bubbles. I then had to pull the battery cable to reset the ecu.
Due to all of this, I no longer ever fill to the Full line.

TreeSemdyZee · 08-01-2016, 12:53 PM

Quote:

Originally Posted by nis350

so how much did you overfill exactly and curious as to why it impacted the idle speed?

Not sure how much over I was, but when you overfill, the oil gets up in the cam and causing foaming. The foam gets in a while lot if places that it shouldn't including sensors.
When I started the car after stopping at a store, the idle felt like I was missing on multiple cylinders. Extremely rough idle.
The only cure is to drain and refill. Maybe more than once.

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