Sporatic Power/Boost?

Gibson6594 · 07-20-2009, 05:16 PM

This may all be in my head, but I am seeking your advice anyway. I have no problems with the power of my 335, I love it and it gives me a lot of joy.

The problem is I feel like sometimes when I gas it, the power booms like a bat out of hell and sometimes it just accelerates mildly. Now, I've been driving stick for 11 years and I'm aware of power bands and turbo lag. This isn't the case. The car will be in a solid rev range and I will floor it not get that usual RUSH of power sometimes.

Does this sound familiar to anyone?

Thank you.

happy4nk8er · 07-20-2009, 05:32 PM

Only time I feel that is with a really fat girl in the car or engine not up temp.

Gibson6594 · 07-20-2009, 05:49 PM

Quote:

Originally Posted by happy4nk8er

Only time I feel that is with a really fat girl in the car or engine not up temp.

I would venture to guess that the fat chick would slow down the car at all times while present. This slowdown is random.

dlbrooks18 · 07-20-2009, 05:55 PM

are you tuned? could be a little heatsoak from time to time as well.. could also be DTC/DSC intervention that could be cutting power if it senses wheels are about to break traction. For this reason I always drive with all nannies off..

Gibson6594 · 07-20-2009, 05:56 PM

Quote:

Originally Posted by dlbrooks18

are you tuned? could be a little heatsoak from time to time as well.. could also be DTC/DSC intervention that could be cutting power if it senses wheels are about to break traction. For this reason I always drive with all nannies off..

I'm stock.

Those are good points. Thanks

shifterboy45 · 07-20-2009, 07:02 PM

sounds kinda familiar -- not saying its the case with your car .. mine granted its still not fully broken in -- i found that if i hopped on it at times it was "all there" and feel real torquey -- but other times even after the engine warmed up, it felt a lil soggy in regards to acceleration. til one night i jump on it and the SES light comes on and it really "feels" bad.. turns out i had a bad injector on #1cylinder. they replaced 1 injector and the associated spark plug, and now after 150mi of adapting its strong all the time. so there could be a lot of variables to your lack of power equation.

i'd drive it and note when (hot / cold / after hard passes / high ambient temp) when it happens and drill down from there. if you find a pattern, then you have a better starting point on a lack of fuel (eg injectors HDP pump). lack of boost (turbo/wastegate / engine sensor issue) or something totally different than has been mentioned..

Panoz · 07-21-2009, 12:56 AM

I feel the same sometimes...I believe its all in our head

Kroy · 07-21-2009, 01:03 AM

Quote:

Originally Posted by Panoz

I feel the same sometimes...I believe its all in our head

I get the same sometimes. You're right, it's probably all in our heads. Could it be the program? Such as 29.2?

OT, your picture makes me want a strawberry shake.

07-20-2009, 05:16 PM	#1
Gibson6594 Major 1097 Rep 1,270 Posts Drives: 2016 SO M3 Join Date: May 2009 Location: NY iTrader: (0)	Sporatic Power/Boost? This may all be in my head, but I am seeking your advice anyway. I have no problems with the power of my 335, I love it and it gives me a lot of joy. The problem is I feel like sometimes when I gas it, the power booms like a bat out of hell and sometimes it just accelerates mildly. Now, I've been driving stick for 11 years and I'm aware of power bands and turbo lag. This isn't the case. The car will be in a solid rev range and I will floor it not get that usual RUSH of power sometimes. Does this sound familiar to anyone? Thank you.
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07-20-2009, 05:32 PM	#2
happy4nk8er Second Lieutenant 2 Rep 277 Posts Drives: 335i E92 Join Date: Jan 2009 Location: Milky way galaxy iTrader: (0)	Only time I feel that is with a really fat girl in the car or engine not up temp.
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07-20-2009, 05:55 PM	#4
dlbrooks18 Brigadier General 161 Rep 3,736 Posts Drives: e90 335i Join Date: Nov 2008 Location: Los Angeles iTrader: (2)	are you tuned? could be a little heatsoak from time to time as well.. could also be DTC/DSC intervention that could be cutting power if it senses wheels are about to break traction. For this reason I always drive with all nannies off..
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07-20-2009, 07:02 PM	#6
shifterboy45 Major 23 Rep 1,179 Posts Drives: 2009 335i Coupe Join Date: Feb 2009 Location: North by Northwest iTrader: (0)	sounds kinda familiar -- not saying its the case with your car .. mine granted its still not fully broken in -- i found that if i hopped on it at times it was "all there" and feel real torquey -- but other times even after the engine warmed up, it felt a lil soggy in regards to acceleration. til one night i jump on it and the SES light comes on and it really "feels" bad.. turns out i had a bad injector on #1cylinder. they replaced 1 injector and the associated spark plug, and now after 150mi of adapting its strong all the time. so there could be a lot of variables to your lack of power equation. i'd drive it and note when (hot / cold / after hard passes / high ambient temp) when it happens and drill down from there. if you find a pattern, then you have a better starting point on a lack of fuel (eg injectors HDP pump). lack of boost (turbo/wastegate / engine sensor issue) or something totally different than has been mentioned..
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07-21-2009, 12:56 AM	#7
Panoz Lieutenant Colonel 84 Rep 1,575 Posts Drives: E92 Space Grey 335i ,Aero Kit Join Date: Nov 2006 Location: EU iTrader: (0)	I feel the same sometimes...I believe its all in our head __________________ Procede V4 , Catless DPs, Forge FMIC, Injen Intake, VK Oilcooler, Hartge Quads Exhaust, Modded CDV, Synapse BOV Kit, BMW Performance 335i SSK Kit, P3 vent boost gauge Space Grey 335i -> See more pics HERE
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