Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB - View Single Post - RPM Dip

Sasquachulator · 09-25-2019, 06:21 PM

I remember my old Corolla XRS doing an RPM dip when stopped when the AC was on. There was also a clear drop in power too when the AC was on.

More recently however, my Scion IM is doing it.

At times I stop at a light and I can feel the car (and see the RPM) fluctuate between around 500ish to 1000rpm when stopped (leveling off at 750ish for a period before it does it again).

I figured it had something to do with the A/C compressor due to previous experience but I don't have defog or anything that I would think would activate the AC compressor...….so I thought it was weird.

I did have an oil change and that SEEMED to have fixed it for like a week or two but then it came back.

Ill live with it, but I don't know why the car fluctuates the idle as much as it does.

09-25-2019, 06:21 PM	#20
Sasquachulator Pavement Grey Join Date: Dec 2011 Drives: 2020 Toyota Camry XSE, 2017 BMW X1 Location: Calgary Posts: 3,116 Thanks: 109 Thanked 2,256 Times in 1,221 Posts Mentioned: 8 Post(s) Tagged: 0 Thread(s)	I remember my old Corolla XRS doing an RPM dip when stopped when the AC was on. There was also a clear drop in power too when the AC was on. More recently however, my Scion IM is doing it. At times I stop at a light and I can feel the car (and see the RPM) fluctuate between around 500ish to 1000rpm when stopped (leveling off at 750ish for a period before it does it again). I figured it had something to do with the A/C compressor due to previous experience but I don't have defog or anything that I would think would activate the AC compressor...….so I thought it was weird. I did have an oil change and that SEEMED to have fixed it for like a week or two but then it came back. Ill live with it, but I don't know why the car fluctuates the idle as much as it does.