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-   -   2009 750i: A few of questions (http://www.bimmerfest.com/forums/showthread.php?t=663953)

jwanes 12-13-2012 06:20 PM

2009 750i: A few of questions
 
I recently purchased a 2009 750i and I have a few questions questions:

1) The engine seems to take a long time (30 minutes) to come to operating temperature, with an outside temperature close to or below freezing in city driving. Is this normal? My Cadillac get to temperature within 10 minutes.

2) during this warm up period, the engine runs rough during hard acceleration. It is OK when driving gently. It seems to smooth out when the car reaches the operating temperature. Have other owners experienced this?

3) Often, to put my car in the garage I have to move other cars parked in front of the garage door. To do this I keep the BMW running while I use the key on the key-chain containing the FOB to drive the other car. During this time the FOB is in the other car away from the BMW. The BMW remains running and I am able to drive it into the garage. The dashboard displays a warning saying that I can't start the car without the key FOB but it allows the car to run and be driven. The distance between the car and the key FOB could be 60-80 feet.

My question is, would the car turn off if this distance is increased, say if you or someone else drives off? What is that distance?

azbimmer 12-13-2012 08:05 PM

Quote:

Originally Posted by jwanes (Post 7248648)
I recently purchased a 2009 750i and I have a few questions questions:

1) The engine seems to take a long time (30 minutes) to come to operating temperature, with an outside temperature close to or below freezing in city driving. Is this normal? My Cadillac get to temperature within 10 minutes.

2) during this warm up period, the engine runs rough during hard acceleration. It is OK when driving gently. It seems to smooth out when the car reaches the operating temperature. Have other owners experienced this?

3) Often, to put my car in the garage I have to move other cars parked in front of the garage door. To do this I keep the BMW running while I use the key on the key-chain containing the FOB to drive the other car. During this time the FOB is in the other car away from the BMW. The BMW remains running and I am able to drive it into the garage. The dashboard displays a warning saying that I can't start the car without the key FOB but it allows the car to run and be driven. The distance between the car and the key FOB could be 60-80 feet.

My question is, would the car turn off if this distance is increased, say if you or someone else drives off? What is that distance?

I can't answer 1 ans 2, since I live in a warm place, but 3 is definitely true, and it is a poor design choice. The car should shut off if the key is taken outside the car. People have died because they forgot to turn off the car, took the key thinking it is off, and the house became full of CO. Major design fail, IMHO.

MMLLC 12-13-2012 10:07 PM

Quote:

Originally Posted by azbimmer (Post 7248853)
I can't answer 1 ans 2, since I live in a warm place, but 3 is definitely true, and it is a poor design choice. The car should shut off if the key is taken outside the car. People have died because they forgot to turn off the car, took the key thinking it is off, and the house became full of CO. Major design fail, IMHO.

We've got a really tight fit in our garage. I back out my 750i often for my Wife to run errands. Can't tell you how many times the "No Key Detected" warning has already cleared by the time my wife gets into the car. By that time I'm back inside working. 30 minutes she will call me bc the key is still in my pocket at home...has happened 3 times :)

f01driver 12-13-2012 10:44 PM

The issues you describe in questions 1 and 2 sound about normal because I've noticed the same issues. My car is sluggish during the first 10 minutes or so after start up in cold weather, it's actually pretty embarrassing when you're at the lights and your car jerks like you made a bad gear change but it smooths out once the car is warmed up. I actually noticed the exact same thing with my e92, it was also very sluggish after start up in cold weather.

jwanes 12-26-2012 08:56 PM

What is the reason for the sluggishness? My Cadillac is smooth practically from the get go. Is it because of the turbos?

Individual750LI 12-28-2012 11:09 AM

My 7 does the samething too, rough before it reaches normal temp. Since my commute is only 8 miles highway, I usually got to work before the temp goes normal now.

csmeance 12-28-2012 04:14 PM

Quote:

Originally Posted by jwanes (Post 7248648)
I recently purchased a 2009 750i and I have a few questions questions:

1) The engine seems to take a long time (30 minutes) to come to operating temperature, with an outside temperature close to or below freezing in city driving. Is this normal? My Cadillac get to temperature within 10 minutes.

2) during this warm up period, the engine runs rough during hard acceleration. It is OK when driving gently. It seems to smooth out when the car reaches the operating temperature. Have other owners experienced this?

3) Often, to put my car in the garage I have to move other cars parked in front of the garage door. To do this I keep the BMW running while I use the key on the key-chain containing the FOB to drive the other car. During this time the FOB is in the other car away from the BMW. The BMW remains running and I am able to drive it into the garage. The dashboard displays a warning saying that I can't start the car without the key FOB but it allows the car to run and be driven. The distance between the car and the key FOB could be 60-80 feet.

My question is, would the car turn off if this distance is increased, say if you or someone else drives off? What is that distance?


1) BMW's operating temp is about 220-250F which is WAY higher than your typical car! I'm willing to bet your cadillac is more like 210F. This not only takes longer to get up to, but is bad for all the little rubber seals and such in the car. Us E65/66 owners are learning of this now and are figuring out why so many gaskets and such are failing.

2) I can't really comment on the roughness, but I imagine it's due to the oil and such not being up to full temp and the car stumbling due to it.

3) This is a double edged sword as far as safety and connivence go. If you loose your keys and the car is still running, you can still drive around and find your keys fairly quickly. However the bad thing is that once the car is running, it'll stay running! That means that if it's stolen or your are car-jacked the car will continue to drive away! However once it's off it's off.

jwanes 12-30-2012 02:13 PM

[QUOTE=csmeance;7276224]1) BMW's operating temp is about 220-250F which is WAY higher than your typical car! I'm willing to bet your cadillac is more like 210F. This not only takes longer to get up to, but is bad for all the little rubber seals and such in the car. Us E65/66 owners are learning of this now and are figuring out why so many gaskets and such are failing.

My car runs about 105C or 220F steady state. It is cold out now we'll see where the temperature gets to in the summer. The 12 O'clock position on the gauge is 120C or 248F but it never gets there.


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