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      11-25-2013, 08:21 PM   #1
jon1275
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Drives: 2007 M coupe ILB
Join Date: Oct 2010
Location: ga

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z4 dies only on the track

I am wondering if any others on the forum have had similar experience??? This happened 4x this past weekend at Road Atlanta on a track day. It has happened 3x total over the past 6mos on track days--so the 4 episodes this weekend much worse. So what happens is that when under load, power will be lost and I will coast to a halt. When I put in clutch the engine dies out. All electrical systems seem okay with no fading or pulse. The car will then immediately start right up and run fine until the next time. This has happened under full throttle, high rpms, and most occasions high g load. I have no codes coming up other than the emissions sensors which have been up since I pulled my cats off. This also didn't happen until I added the ESS tune (?coincidence). My best bet is a fuel delivery problem with either the filter or fuel pump (gas tank has been full when this occurred). I don't drive the car much on the road but cannot duplicate under normal driving. My plan is to replace fuel filter and then if this fails the fuel pump. Any other ideas would be much appreciated? thanks, jon
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2007 z4m ILB//6pt custom cage//recaro hans spg racer//afe intake//ESS tune//volk rays//uuc shifter//tc kline DA coilovers w/ anti-sway//evosport headers//koala motosport diff
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