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#1
05-07-2013, 01:09 AM
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Sounds like the coils are not seated and / or a vacuum leak. Could be coils are SWITCHED if that's possible (wrong coil on wrong plug). Check the firing order and pull all coils and reseat to hear / feel a "snap" or "pop" and feel all small hoses for connections / cracks.
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2005 BMW X5 4.8is (E53) LeMans Blue / Black Leather Interior (Comfort Seats) / All Packages / aFe Stage 2 Cold Air Intake / Software Update / Suncore Industries E53 Air Suspension-To-Coil Springs & Struts Conversion Kit w/Gas Shocks & Warning Message Removal Tool 
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#2
05-07-2013, 06:39 AM
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I was just out in the garage poking around before I go to work and I noticed that the throttle body is dirty(carbon buildup), and the butterfly valve is not closing all the way. I was wondering what is the best way to clean that?
Also,Thanks for the help so far.
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2001 X5 4.4i
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#3
05-07-2013, 08:38 AM
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Quote:
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2001 4.4 x5 - owned since 2004.
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#4
05-07-2013, 09:41 AM
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Quote:
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2001 X5 4.4i
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#5
05-07-2013, 10:12 PM
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OK, here's an update. I cleaned the throttle body, but that didn't help at all. I also cleaned the MAF Sensor because along the way one of the codes I saw said something about mass air, so I thought it couldn't hurt. It didn't help either.
The next thing I tried was to swap the ignition coils from cyls. 1-4 with the coils from cyls 5-8, since according to the codes I had, all my misfires were on cyls. 5,6,and 8. After switching the coils, I only had 2 misfire codes(cyls 5+6), instead of 7 codes like before, but it's still running really rough. Does anyone have any more ideas on what I could try next to narrow things down? Thanks. Also, as far as the coils being "seated" properly, I noticed that when I removed them, there was a small "pop" like everyone talks about, but when installing them they do not "snap" in place, they just sit on the plugs. There is a spring action there in the sense that if I push them all the way down and then let them go, they "spring" up about 1/4" or so until I put the nuts on and tighten them down. Does this sound normal for the coils?
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2001 X5 4.4i Last edited by jfclk33; 05-07-2013 at 10:20 PM. Reason: Thought of another question
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#6
05-09-2013, 07:33 PM
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If you are certain it's NOT the coils, check the plugs again, then be sure the wires going to the coils are intact and not broken or heat damaged.
It's odd that it improved with the swap, albeit good. One may have not been seated right at least, but since you still have two cylinders misfiring, track it backwards. Perhaps you can score a couple coils from an auto recycler just to be sure its not a coupe bad coils. Your coils are seating properly, the way you described it is exactly as they are intended to seat. 
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740iLDUKE 01' DINAN 7 S62 Swap - Stratus Grau (1587 produced in SG 440) 02' 4.6is DINAN X5 S2 Supercharged 833/3258 produced | 1/27 Dinan X5's
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#7
05-10-2013, 07:53 PM
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Just wanted to report back that I got it fixed. It turns out that when I put the wiring box with the fuel injector connectors back on, I didn't get it on all the way. I thought it clicked in and when I looked at it later, I would have sworn those connectors were all the way on there, but they weren't. I'll edit the title to reflect that the problem is solved and thanks for the help.
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2001 X5 4.4i
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