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05-22-2016, 02:43 PM | #1 |
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Strange Issue After Cold Start
Hey all! I posted this is another forum, but I want to see of any of you can possibly shed some light into an issue that I have had with my new to me E90 M3.
Ok, so first off - I cannot reproduce this issue 100% of the time, it seems like it it ~50/50. When I cold start my engine (in 60F Seattle weather), everything seems to be normal with the RPMs and I do not hear any sounds that I would consider to be unusual. If I give it some gas when idling in the first minute or two, it will not rev up cleanly .. it almost seems like it is flooding the engine and it doesn't fire smoothly. When this occurs, I cannot seem to rev past ~2500-3000 RPMs. After a good two minutes, I can get on the pedal from idle (while parked) and it revs just fine. I have been doing some research and cannot find an exact match to this problem that I am having. I haven't inspected the spark plugs, my intuition tells me to change them (I have several service invoices and do not see anything that shows that they were ever replaced throughout its 63K mile history). Any thoughts on what this issue could be? If you need more information, let me know |
05-22-2016, 03:51 PM | #3 |
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hard to tell without seeing what it is doing in person but nothing you describe sounds too out of the ordinary. the car won't rev too high when cold because of the variable tach and with the secondary air pump running it will likely not seem to rev smoothly and will run "rough". Not saying you don't have an issue but it's hard to tell if what you experience is normal or not just based on your description
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05-22-2016, 07:17 PM | #4 |
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That's a odd thing to happen?
But the good news is that the 65k service is drawing near.(wouldn't say it's good news because if you don't have a warranty, that shit is expensive! Believe me) Ether you have a warranty or not? When you take it in, be sure to make that a statement to your SA |
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05-22-2016, 10:58 PM | #6 | ||
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My instincts agree, I'm not going to leave anything to chance and will get it checked out soon! |
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05-23-2016, 12:13 AM | #7 |
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I would never floor the car when the engine is cold. if you start the car from dead cold and immediately floor the car the oil pump hasn't even sufficiently allowed for proper oil distribution throughout the engine yet so you are putting unnecessary strain on an oil starved engine. not good. sorry if I am misunderstanding but I still don't see an issue based on what you are describing? my car won't rev passed a certain point when cold either. it's designed not to to protect itself.
and what 65k mile service are we talking about again? |
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05-23-2016, 12:57 AM | #8 |
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maybe check your intake/tubes and see if any are cracked/etc. tell us more about your mods/mileage/etc.
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05-23-2016, 04:46 AM | #9 |
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For all I know my car could have the same issue ... But since I start my car and let it complete the entire "cold start cycle" before I move it or even touch the throttle ... Who knows.
Try starting the beast and then chill for a minute to enjoy the sound and wait for the end of the procedure before you floor it!
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05-25-2016, 11:20 PM | #10 | ||||
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Without touching the pedal, the RPMs sat at ~1100-1200 for a good half minute. After that half minute, it dropped down to ~700 and I gave it some pedal gradually until the RPMs climbed to ~2500. It revved a little rough, after that I hit the gas a little harder and it would stutter and only peak out right around 3K RPMs. A minute later and everything is fine. Quote:
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05-26-2016, 02:22 AM | #11 | |
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Drives: E92 M3
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05-26-2016, 10:20 AM | #12 |
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05-26-2016, 11:31 AM | #13 | |
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Let it idle for 1 minute and then go! Keep the revs under 3k until the oil temp hits 190-200... These cars run like shit during the cold start cycle, but then again, so does every other supercar I ever had... It's just the nature of a high strung motor... |
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05-28-2016, 12:26 PM | #14 | |
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I usually let my vehicle warm up until the idle drops to normal levels, this is the first one that I have owned that actually exhibits this behavior hence I had posed the question. Thanks again!!! |
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05-29-2016, 11:49 AM | #17 |
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Hey buddy! Hahaha, i remember this from when I had my M3, I want to share:
I had a very similar issue, I always though it was because I did a 4.6 bore on my 4.0, but i know thats bs. Anyways, when I started having some high milage on my M3 i noticed that when I would rev my engine after a little on cold oil it would sputter a bit as it went back down on rpms. It was perfectly fine after it warmed up, and i think it gets worse as the engine climbs in miles, but I almost can promise you that you don't need to worry at all. Give your car some more warm up time! My new F82 actually has a feature now that it will not let me rev past a certain rpm until she is warmed up, that is how serious that has got. So that tells me it based this from a pre-condition on the e92. I hope that supports anything that was said on here! |
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05-30-2016, 06:38 AM | #18 | |
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