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Old 11-28-2008, 02:00 PM
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hiccup in the morning

today when I left my house to go for work, within 2 minutes of driving my X made couple of hiccups, almost like braking and releasing. Seems like the engine wasn't getting any power. It was fine afterwards. Could it be because of the weather, but its not that cold yet. Only 6 degrees Celsius when I left home. Did anybody else experience this...?? Is it dealer time..??

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Old 11-28-2008, 02:06 PM
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did you warm it up for any amount of time or did you just get in and go? When you say almost like braking it was probably downshifting while you were cruising (no foot on the gas, am I right?). I think it feels heavier like that when I initially drive away from home... needs a bit of warm up driving time before it gets loose, especially when cold. Still though, if you're feeling this again under different conditions (like if you were driving for 20 minutes already) then I would get it checked out.
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Old 11-28-2008, 04:13 PM
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Yes, I did warm it up for about 15-30 secs or so. I usually do warm it up before driving out. I had my foot on gas though when I felt it was breaking. Its like when you're starting to go uphill in a high gear and you feel no power. Usually then engine downshifts, but in my case, I wasn't going uphill and and am pretty sure I was in either first or second gear, its like car was struggling to get some power.
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Old 12-01-2008, 08:03 PM
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BMW E70 manual says not to start car and let idle in order to warm up....instead, just start out driving. Perhaps a stupid question, but why?
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Old 12-01-2008, 08:28 PM
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No specific reason, maybe out of habit. I used to do it with my previous cars. It hasn't happened since then and it was the first time in last one year when it happened.
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Old 12-01-2008, 10:09 PM
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Quote:
Originally Posted by pureflames
BMW E70 manual says not to start car and let idle in order to warm up....instead, just start out driving. Perhaps a stupid question, but why?
That wouod be the first for me... and I've always give good time for my vehicles to warm up...

Granted, maybe this E70 has a way of reducing crankcase pressure from thick oil(temps) and preventing it from pushing it out of the seals

I know my M pretty much warns you with the tach... once it's at operating temps, the dummy lights go off, and pretty much tell me nail down on the throttle...as well as an oil temp gauge...

But I always let my vehicles reach near 200F temps, before I give them normal driving throttle... sometimes even let them get to operating temps when I can... of course, prolonged idleing/warm up is bad depending...

I have a hobby of RC nitro truck racing...and with the nitro engine's design, it is better to get the motor to operating temps fast...which usually means giving throttle... But because the cylinder exspands as it gets hot, and the quicker you can get there, the less piston/cylinder wear.... But this is a piston/sleeve design as well as pre0mixed 2 stroke.. so bringing lube to the top of the engine and crankcase pressure is non-issue...
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