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Edit: after some thinking today, I do noticed my temp gauge reads 40 to 60c almost instant after been sitting 4 hours. It should be cold, no? So temperature sensor giving the ecu wrong info and make it run like this perhaps?
So, a small issue came up. I've searched as well. I had to join this forum because Facebook groups wasn't cutting it anymore.
Someone else posted this comment on my page and this is exactly what im experiencing down below.
(Does this only happen after it sits for a couple hours? I noticed the exact same thing only after it sits for a couple hours and always when coolant temp is between 40-60deg.
I was thinking it might be ignition timing related for faster emissions warmup. Or perhaps a leaky injector but I have no other issues.
Startup after overnight is perfect too.)
This doesn't seem like a miss fire issue because it smoothes it self out. Lately, I noticed, when its lunch break at work I go get food from somewhere, engine is cold, ill start it up, no problems at all until I put it in gear, it acts like it wants to stall out and shake the whole car a little. Sometimes if I rev it up a little, it goes away. Or if I restart the car, it goes away. It doesn't always do this. What is this?
It's a 2012 C250 with 100k miles on the m271 evo. Im thinking throttle body needs some cleaning?
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