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      05-29-2014, 10:32 AM   #1
torrque
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2008 335xi sedan, lack of power... options ?

Hi Guys,

I am new to this board, as I just bought 3 months back a 335xi sedan.. second hand of course.

The short story is that I needed a car urgently ( I just moved to US ) , so I only had a choice of 2 vehicles within reasonable distance to me, manual sedans... One was thrashed going in limp mode, and this one was in half decent shape.

It has no mods...
So far, I did as much maintenance as I could :
-oil change
-new coil packs
-new spark plugs
-one injector was bad, swapped that and changed oil again ( it was running rich and the oil most likely got contaminated )
-both differentials, transfer case and gearbox oil renewed

Car has no error codes though.

Problem is, it feels slow... I don't hear any kind of turbo noise, or blow off valve noise as I would expect from a turbocharged engine... Is that normal ?

Is there a way to log boost values with INPA or something similar to check for turbo pressure ?

Now; we need to consider the other thing, that I come from daily driving an M3 before the 335xi (overseas) and my other car is a 2013 Shelby GT500 ( 662 HP car)... so my definitions of fast are a bit skewed maybe

Otherwise, is anyone in Newton/Brookline area with a simlar car as mine willing to swap with me for 2 minutes, or just drive mine to see how it feels ?

I am also thinking taking it for an inspection to the dealer, but they will charge me a 3 figure number for that.

Many thanks for any opinions.
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      05-29-2014, 10:37 AM   #2
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Whenever I put my car back to stock, it feels like a rental car. Stock 335xi's feel pretty slow to me. I assume you don't have any sort of tune. If so, you could pull logs pretty easily and identify if you have a boost leak or timing pull.
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      05-29-2014, 10:42 AM   #3
torrque
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Quote:
Originally Posted by 2Times View Post
Whenever I put my car back to stock, it feels like a rental car. Stock 335xi's feel pretty slow to me. I assume you don't have any sort of tune. If so, you could pull logs pretty easily and identify if you have a boost leak or timing pull.
Thanks.

You are correct, I have no mods what so ever.... My wife drives it for now, and she also complained it was slow, imagine that

would I be able to do log boost data and timing with INPA ?
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      05-29-2014, 03:05 PM   #4
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Quote:
Originally Posted by torrque View Post
Hi Guys,

I am new to this board, as I just bought 3 months back a 335xi sedan.. second hand of course.

The short story is that I needed a car urgently ( I just moved to US ) , so I only had a choice of 2 vehicles within reasonable distance to me, manual sedans... One was thrashed going in limp mode, and this one was in half decent shape.

It has no mods...
So far, I did as much maintenance as I could :
-oil change
-new coil packs
-new spark plugs
-one injector was bad, swapped that and changed oil again ( it was running rich and the oil most likely got contaminated )
-both differentials, transfer case and gearbox oil renewed

Car has no error codes though.

Problem is, it feels slow... I don't hear any kind of turbo noise, or blow off valve noise as I would expect from a turbocharged engine... Is that normal ?

Is there a way to log boost values with INPA or something similar to check for turbo pressure ?

Now; we need to consider the other thing, that I come from daily driving an M3 before the 335xi (overseas) and my other car is a 2013 Shelby GT500 ( 662 HP car)... so my definitions of fast are a bit skewed maybe

Otherwise, is anyone in Newton/Brookline area with a simlar car as mine willing to swap with me for 2 minutes, or just drive mine to see how it feels ?

I am also thinking taking it for an inspection to the dealer, but they will charge me a 3 figure number for that.

Many thanks for any opinions.
If car has any major leaks it will pull a code if you go WOT for 4 seconds.
If it does not have a leak and still feels slow, Get a JB4+Dp+DCI+Intercooler!!!
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      05-29-2014, 03:09 PM   #5
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If there is someone local with a Cobb AP, they could ride with you and watch live data on the AP without marrying it to your car, and could also see if there are any stored codes.
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      05-29-2014, 03:10 PM   #6
torrque
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Quote:
Originally Posted by mike@x-ph.com View Post
If car has any major leaks it will pull a code if you go WOT for 4 seconds.
If it does not have a leak and still feels slow, Get a JB4+Dp+DCI+Intercooler!!!
Thank you, will try that one...
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