2003 X5 stalled while driving at low speed

[80stech]

Good but just in case you don't know, DO NOT use carb cleaner when cleaning the IAC motor.

[andrewwynn]

What about brake kleen? I never m remember which can't be substituted.

Carb cleaner is bad when rubber is involved? No rubber seals in carb?

I was thinking maybe IAC. If stumble when going through curve happened to be off throttle = idle?


–awr–

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[Meestahbig]

Yeah, I think I used carb cleaner. Shoot!

[80stech]

Maybe it was some wimpy environmentally friendly stuff and you'll get away with it (fingers crossed,) otherwise if you start getting sticky IAC motor symptoms you'll know what you need.

[Meestahbig]

Well 200 miles after cleaning the IACV, car did low speed stall on a turn. Similar to previous issues with the camshaft sensors, but mine are new from mechanic but not OEM BMW. No error codes. I hate to give up on this car bc of this, but I'm not sure where to look. Fuel pump is fine, no air leaks, cam and crank sensors are new, but not OEM. MAF and IAC cleaned. Idle RPM is stable and car idles perfectly fine. Damn.

[80stech]

I thought you ordered OE cam and crank sensors ?? Have you tried new spark plugs?

[Meestahbig]

I had the parts but then figured shit how can my new ones be bad right away. But yeah now I'm leaning toward swapping the crank sensor again with OEM. The stalls happened after I replaced the sensor and the fuel pump. My issue was the bad fuel pump initially. So I'm just lost at the moment.

I can't see how one bad plug would cause the car to shut down with no codes. I don't think it's that.

[andrewwynn]

Plugs will cause misfire but CKP will cause shutdown.

I don't recall if e53 needs it but it's typical to require precise shimming to .001".


–awr–

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[Meestahbig]

Can someone post a link or part number for the working junction box that plugs into the sensors and the Maf. I can't find it. My wires are old and brittle. The plastic wire cover is gone.

[80stech]

Just look under "engine wiring harness" but are sure you really need that?? it's going to be pricey, maybe a used one ?? It's 12517531986 for after 10/03 (I looked for mine but will give you an idea) over $600 on FCP!

I can see your point though, if a lot of people have been working on the vehicle and you have maybe broken connector housings and maybe suspect ruined/expanded contacts which can be intermittent and really hard to pin down. This would be in addition to changing the sensors (especially the crank) to OE, not instead right?