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Old 08-16-2010, 11:24 AM   #1
El Gato Liso
6th Gear Member
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Join Date: May 2007
Location: Brampton
Posts: 3,225
lower end acceleration M50TU

i find that when the gas is pushed hard in 1st gear into just doesnt feel like its picking up any faster than my m20.

at higher RPMs, 2nd and 3rd gear really feel a much harder acceleration especially in vanos. but first gear feels like its lacking.

any reason why?

im using shell 91
vaccuum lines are all up and running.

i dont have an O2 sensor plugged in though...could that cause it?
R.I.P. E30
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Old 08-16-2010, 12:04 PM   #2
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A missing o2 sensor will cause any car to run like crap, your dme has no idea whats going on inside the combustion chamber. It probably only feels strong at higher rpms cause the base maps of the dme are telling it just to dump fuel. You should probably fix that lol
S52 E30
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Old 08-17-2010, 06:12 PM   #3
Dr. Flyview
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lol obviously that is most likely it man. Grab a chip from MarkD, it's like overclocking your computer all over again

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Old 08-17-2010, 08:30 PM   #4
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defintely get that O2 sensor in there, but it's likely the vanos. Vanos is out of the picture above ~4.5-5K rpms - it does all its work at low revs.
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