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Does anyone have the issue where the engine surges upon first starting in the morning? When I start mine (6-speed), I get a variable idle between 1K and 2.5K that seems to cycle almost like with the A/C on (but it's not)
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2008 Stormy Blue MX-5 GT
2008 MDX Pearl White
2010 Pearl White Mazda3
i have that too, with my 6spd. its starts up and immediately goes to 2500 RPMs, and then slowly works its way back down to 1000. I have seen ither cars do this as well, and not sure it is anything to worry about.
I get a similar surge of idle, but from 1,000 to about 2,000 rpms. However when I put the clutch in the engine goes back to normal idle. It returns to the surge mode when I let the clutch back out...all is normal once the engine warms up to normal.
when you first start and it goes to 2-3k then slowly goes down - thats normal. surging from normal idle to 2-3k then back down then back up- abnormal. it could be an indication that the neutral sensing switch is stuck so that when you move the shifter to neutral the pcm/tcm doesnt know it and is confused.