Let's fix this thing. I'm back 2003 X5 3.0

[Meestahbig]

The elbow is not cracked. Seems like a vac leak, but an off iacv would present it self like this too. I'll see if fuel trims are off while open throttle. I don't think so and I'm getting good fuel mileage. So could be a vac leak when the throttle plate closes and vac pressure is very high at that moment. Maybe this is why I don't see it in the smoke test. Also, I bet it's not a huge rupture bc then my idling would be off. Misfires, etc. been there done that.

[Meestahbig]

It's all fucking soup. Give me a break. It's maddening,.I don't need the extra bullshit.

Mechanic did nothing. Drove it, no errors, gave me car back. Charged me an hour. What a joke. Didn't so a vac test. Supposed top shop. Lame as fuck.

Anyway, OEM iacv didn't fix it. Car rides different but it didn't fix the stall
I also changed the throttle body gasket. Still stalls.

I'm again swapping both camshaft sensors. Using oem and doing myself. I had these swapped with another mechanic in Sept when I was dealing with skin cancer, so just had him do the work. I assume he used cheap parts, but anyway it's prob not the cam sensors, but easy enough.

I will swap the vanos parts I have sitting. Then I'm done on the parts thing. Need to really diagnose further. Need to take fuel pressures, I want to do a proper smoke test.and also read the fuel trims properly. Beyond this - next step is pull the intake manifold and replace check over all vac lines and the ccv.

Everything else has been changed or swapped with my working 2006.

[X5chemist]

What's your running voltage? Fuel pressure is a good check. Especially at idle.

[Meestahbig]

Battery is new and alternator is ok.

It appears the problem is really isolated now to - I test drive like 20+ miles. Mostly side roads, then I hit the highway. When I get to a store, I'm rolling around the parking lot looking for a spot and boom. Steering wheel get tight, car is off. Not always while turning into my space, sometimes while just rolling down the lane.

This was more typical of my last time when it was the camshaft sensor. This time what was different was the stalling while in stop and go traffic. Anyway. Camshaft sensors in tomorrow. Will test more. Of that fails. I'm pulling the intake off after I do more testing

[X5chemist]

Is there a relearn procedure on the TB?

[Meestahbig]

No idea. Swapped in the used OEM iacv. Nope. Stalled.

I then put in both new OEM camshaft sensors. I also replace the vanos solenoid and the spring piece. After that the car barely could idle. Shaking then stalled. Got some over advance errors. Very odd.somininder the solenoid and spring, went back with old ones and the car ran fine.

Does that tell me anything?

I tried using the obb2 fusion and Bluetooth dongle. I could really make good use of the logging. Just wasn't very clear. Turns out I don't have a fuel pressure gauge, so didn't test that.

So I'm leaning toward pulling the intake manifold and checking over and replacing all the vac lines