[HotSpicyChicken90]

Hi guys, I still have the issue with the ruff, sputtering Idle. I remember that prior the problem I did Re-program the whole car without a battery charger and without ICOM (i programmed it with just a ENET cable) and whilst reprogramming i opened the door and started the car. I don’t know if this could have lead to my currend problem.

It’s driving me nuts.

What can happen if the car was programmed with less than 13.0 V vehicle electrical system voltage? Could it lead to the data not being overwritten properly due to the lower voltage? -> what can cause the car to run badly when idling? Mixture control e.g. ?


I diagnosed with ISTA and INPA and cylinder 4 has huge Ignition-problems! as well as rich condition
But Spark plugs, coils and injectors are new!

[Trainwreck914]

I remember you having another thread about this. Did you replace fuel pumps? Either high or low? What information did you get from ista exactly?

[HotSpicyChicken90]

No I didn’t replace the pumps

P0172: System too rich
and a newcomer: Multiple Misfire codes Zylinder 3 + 4

[HotSpicyChicken90]

I didn’t have this problem before the full-flash

So: Can the software be the cause of this issue, theoretically?

[thakid22]

Originally Posted by HotSpicyChicken90

Hi guys, I still have the issue with the ruff, sputtering Idle. I remember that prior the problem I did Re-program the whole car without a battery charger and without ICOM (i programmed it with just a ENET cable) and whilst reprogramming i opened the door and started the car. I don’t know if this could have lead to my currend problem.

It’s driving me nuts.

What can happen if the car was programmed with less than 13.0 V vehicle electrical system voltage? Could it lead to the data not being overwritten properly due to the lower voltage? -> what can cause the car to run badly when idling? Mixture control e.g. ?


I diagnosed with ISTA and INPA and cylinder 4 has huge Ignition-problems! as well as rich condition
But Spark plugs, coils and injectors are new!

I see you added new fuel injectors...
They must be coded into the DME with proper values.
The values to enter are printed on the injectors.

Did you code them?
How many injectors did you replace? Are you sure they are genuine and/or high quality?

As for when you programmed the car, it should be ok as long as all modules completed without failure messages. It may, however, give you peace of mind to go back and reprogram everything again with proper voltage and closed doors, so that you can rule this out for sure.

[HotSpicyChicken90]

yeah i replaced all 6 with genuine BMW injector. All of them were Index 7! for the N55. 2 of them had a different manufacturing date. Yes i code them. i checked 3 times.

Im so frustrated.


Yesterday I got 2 misfire codes. Though the problem is only at startup. and at very low speed.

I reckon maybe the new software is behaving different since the car is from 2012


I had the problem beforehand. That’s why I changed all the things.

lplease guys help me. Neither the Dealership knows whats wrong

[HotSpicyChicken90]

And also: What are the differences between programming with just an E-Net cable ( what i did)
and with icom (which i dont have)

[Trainwreck914]

Have you done a smoke test? I would start with that to rule out any vacuum leaks. Could be an intake seal or any other place prone to have air leaks. I remember now you threw a ton of $ at this issue. Did you got to a specialist/dealer? Being that you replaced injectors coils and plugs. The only other things it could be is air leak or fuel related. You should really go to someone who knows what they're doing at this point. They must know how to read data/graphs.

[Unspec]

Originally Posted by HotSpicyChicken90

And also: What are the differences between programming with just an E-Net cable ( what i did)
and with icom (which i dont have)

ENET is for esys flashing, ICOM is for ISTA/P flashing. There's no real functional difference.

[HotSpicyChicken90]

so yesterday i arrived in Italy, and drove 2138 km (1328 miles). The car runs absolutely perfect!

The issue is only when start-up and idling and/or while letting the car „walk“ with the torque converter.

Something i’ve noticed recently: Car runs ruff and sputters after 1-2 minutes of idling. I stopped in Rome for a fast Bootmod3 flash. After the flash finished, the car didn’t want to start, although i could hear the starter cranking. Eventuelly it did, but after i floored the gas-padel while starting. And the car had a strong smell of casoline. I noticed that during the flash, the Lpfp did start „making noises“
On the other hand though: The idling after long highway drive is absolutely fine.

The issue shows up only after idling for 1-2 minutes.

So is there a correlation between: Strong gas smell, long cranks (starts only after flooring the gas-pedal), “humming” LPFP, and
P0172: System too rich?

wouldn’t a faulty HPFP throw a CEL? Because i don’t have any!

As i stated before: I am totally confused: i will bring the car to a specialist here down in beautiful Sicily.

[HotSpicyChicken90]

Originally Posted by Trainwreck914

Have you done a smoke test? I would start with that to rule out any vacuum leaks. Could be an intake seal or any other place prone to have air leaks. I remember now you threw a ton of $ at this issue. Did you got to a specialist/dealer? Being that you replaced injectors coils and plugs. The only other things it could be is air leak or fuel related. You should really go to someone who knows what they're doing at this point. They must know how to read data/graphs.

No I haven’t done a smoke test. Since the car runs rich, and not lean. Or am i wrong?


So something is letting in more fuel than required. Could a faulty LPFP and/or HPFP pump more fuel than predisposed?

[BurrNinja]

Originally Posted by HotSpicyChicken90

No I haven’t done a smoke test. Since the car runs rich, and not lean. Or am i wrong?


So something is letting in more fuel than required. Could a faulty LPFP and/or HPFP pump more fuel than predisposed?

Yeah smoke test rules out lean conditions for the most part.