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Old 03-03-2018, 10:36 PM
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Join Date: Jan 2018
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Engine starts, won't idle. No codes or CEL. **SOLVED!**

After fiddling with the HID's yesterday I start the X and the idle starts fluctuating and dropping every so slightly with each fluctuation until the motor dies. I started it again. It starts fine and I can rev it and control rpm with the pedal but as soon as I let off it dies. This morning it ran fine after cold start until it went into closed loop then it repeated the same as yesterday until it wouldn't idle. i removed the air inlet, MAF, checked the throttle and cleaned everything, sensors and connectors. Checked butterfly at throttle body, buttoned it all back up and fired it up with the same issues. I disconnected the MAF and it ran like shit, super rich. I scanned 3 times today with my Foxwell Nt510 and there is no CEL, no codes, no module faults outside of the 3 I'm aware of, lights, cluster and air suspension which are on the list to be repaired soon. I even did a idle test through the throttle body set to 1,000rpm and it would fluctuate between 800 and 1,000 just up and down, up and down. I didn't do a thorough wire inspection beyond 12" of the connectors at the MAF and throttle body. I have a new MAF on the way because it's been about 70k miles since it was replaced. Anything else I should be looking for? Runs great cold but shitty during closed loop. Throttle is smooth, no misses, just won't idle. I can rev it and it dies. Starts right up and dies unless I control the throttle. Thanks in advance.
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2002 X5 4.4

Last edited by 1BADM6; 03-04-2018 at 10:51 PM.
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