Shock or jerk sound while just moving or slowing down the car

[Zulnorain]

Hi every one i need one help regarding an issue i am facing with my BMW 323i 2011. 1 is when i am trying to move parked car, after little movement a sudden shock or jerk happening. Then it is running smooth but once you getting slow on hump or signal even i am using break paddle but car is taking sudden gas little like its jumps. Please somebody help me in this regards. Thank

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[323i E30]

Sounds like you have an intake leak, pulling unmetered air into the engine.
I'd just get the codes from the computer read though, and see what info it has to offer.

[Zulnorain]

Thank you so much for replying. And how to fix that?

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[MarcoZandrini]

The first step in diagnosing a problem is to scan the engine computer (DME in BMWspeak) for codes.

[Zulnorain]

Hi. I have attached a picture of issue what i have got .. May the car engine check light is due to this?

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[bmwdirtracer]

I'd certainly start by replacing the exhaust cam sensor with a new OEM part.

OEM means "original equipment manufacturer", which means either a genuine part from BMW or one made by the exact same manufacturer as made them for BMW. VDO, Siemens, Bosch are good names who manufacture sensors for the BMW factory.

[Zulnorain]

Appreciated.. For your help thanks and i will replace this with as you suggested..

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[bmwdirtracer]

The exhaust cam sensor measures the position of the exhaust camshaft. The computer compares that information to what the computer asked for. If that information doesn't correlate, the first suspect is either the exhaust camshaft solenoid, or the exhaust camshaft sensor.

Upon further thought, the MOST likely culprit will be the exhaust camshaft solenoid ....by a little bit....over the sensor.

Let's try to save you a bit of money, although neither is terribly expensive.

On the front of your engine, there are two solenoids on the cylinder head front. If you can CAREFULLY take these out and clean them, swap them, clear the codes in the computer, you can maybe fix the issue with no money spent at all.

Now, I have to say that this is WRONG: when you pull those two solenoids out, you should replace the o-rings and the support o-rings. But....some rules are meant to be broken.