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Old 11-25-2012, 08:12 AM
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X3-terrestrial X3-terrestrial is offline
Location: N.Miss - Memphis,TN Area
Join Date: Aug 2008
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Mein Auto: '05 X3, '02 M3, '91 E30
Hesitation under load and no CEL, could be a sign of gas starvation. It could be just a clogged fuel filter or a fuel pump going bad. But in order to diagnose a fuel pump, you need special equipment to measure fuel pressures.
Also O2 sensors have been known to produce hesitation under acceleration when they start to fail, although not triggering a CEL.
"If everything seems under control, you're just not going fast enough"
-Mario Andretti.

River City Bimmers BMW CCA
2005 X3 3.0i ZPP, Htd seats, Htd strng, Black Sapphire on Terracotta.
2002 ///M3 Coupe, Steel Gray Metallic on black leather, HK, three pedals.
1991 E30 325ic, AW, Black Leather, Black top, Three Pedals.

Last edited by X3-terrestrial; 11-25-2012 at 08:55 AM.
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