BMW 4 Series Convertible problems with misfiring for some time now

I see. The O2 sensor and MAF are new and for my vehicle. What about fuel pamp? Could that be the causing issue?

A faulty fuel pump could potentially cause misfires, but it's less likely if the problem is only occurring in specific cylinders. Usually, a failing fuel pump would affect all cylinders, not just one or two. However, if you've ruled out other possibilities, it might be worth checking the fuel pump pressure to ensure it's operating within the correct range.

Is there in Carly fuel pump check through live data? Or what is the way to do that?

Unfortunately, Carly does not have a specific function to check the fuel pump pressure. Checking the fuel pump pressure usually requires a mechanical fuel pressure gauge. This is a more complex task that might be best left to a professional mechanic. However, you can use Carly to check for any error codes related to the fuel system, which could potentially indicate a problem with the fuel pump.

Multiple cylinder misfire.just bought this car . Seller said it has a cloned dme could this have some thing to do with it. He said he changed plugs and wires. But I going to pull a spark plugs see what it looks like. Any help would be much appreciated. Thank you .

A cloned DME could potentially cause issues if it's not properly programmed to your specific vehicle. However, multiple cylinder misfires could also be due to a variety of other issues, such as faulty ignition coils, fuel injectors, or even a timing issue. Checking the spark plugs is a good first step. If they look worn or fouled, it might be worth replacing them. If the spark plugs look fine, then it might be best to have a mechanic inspect your vehicle, especially considering the cloned DME.

Hello everyone. Vehicle data: BMW 1 118i E87 year of construction 2005 2l gasoline engine now 165000km I recently changed my starter motor and a hose on the water pump in the workshop. Two weeks ago on the way home my car started to have problems when I accelerated a bit faster. It misfired and jerked. These symptoms seemed familiar to me. I've had this before and it was the ignition coils. Now I have the problem again, had the car read out and 29CC misfiring, several cylinders, 29CF misfiring cylinder 3 and 2A6B valvetronic. I then changed all 4 spark plugs, all 4 ignition coils and the valvetronic. The car ran very well at the beginning until I accelerated faster again, there was a crrrr noise and it started to jerk again. Read out again, cylinder 3 misfiring. Switched the car off. Swapped 3 with 4, started the car again. Ran fine again until I accelerated again. Cylinder 3 failed again. So cylinder only failed when I accelerated, otherwise it works. So no matter what I do, cylinder 3 always fails as soon as I accelerate more. Car turned off and on again, problem gone, accelerating problem back. Info: As soon as I accelerate and it starts to jerk again, the check engine light flashes. I can also drive the car without any problems, but I must not accelerate too quickly above c.a. 2,500 rpm. The timing chain looks good and is tight. Injectors also checked and no problem, have also swapped this with 3 and 4, the problem has not migrated. Swapped injectors 3 with a new one, no change either. Replaced ignition coils for the third time and same problems again. DME control unit: I could not find any damage or cable breakage. Could it be that it is drawing the wrong air? Possibly a hose broke when assembling the intake, had to dismantle everything so I could change the starter. Mfg

(Translated from German)

Hello Simon, How exactly was the timing chain checked? Did you just check the chain through the oil filler neck? Since you also write that you can hear a "Krrr" noise, it sounds to me as if the timing chain is elongated or a plastic sliding rail of the timing chain is broken. I assume since you write that you have replaced the Valvetronic that you are not dealing with the "N43" engine? As you have already written, a leak in the intake tract could also be responsible for the fault and you have already replaced the injectors. The easiest thing to do here would be to check the intake tract for leaks with a fogging machine.

(Translated from German)

Thank you very much. I will recheck all the jobs.

Hello, when accelerating powerfully, the error that the 4th and 5th cylinders have failed appears from time to time, the engine light comes on and the engine then runs very unevenly. If I then switch the engine off and restart it runs normally ?

(Translated from German)