Originally Posted by MrQuickR1
07 328 e90
It's the characteristic of the car.....
At least that's what I've been told from the dealer.
I have the powerbox in as well and it does amplify the effects, I have to keep it on stock map for now so it's not as bad, but still is.
I have changed out the plugs, coils, MAF, air filter, had the fuel pump checked, fuel sending unit checked, fuel injectors checked, and then some, I had been leaning towards the gas pedal position sensor, maybe something to do with the stability control sensors, or just a bad throttle body.
I'm tired of dumping money and time into this car. If it weren't for my commute, I would go back to Dodge trucks.
At first I suspected a bad powerbox, it happens, but BMS responded back to me with such a shitty response saying to get a 335. Then asked if I installed it right. Hello, I'm not an idiot! Perhaps they are with their instructions, a couple of pin numbers to connect the wires to said it was one color but it wasn't the color in the car as they said it was. I connected it to the pin number. I then questioned myself if that was right, so it has to be something else, it's just a damn mystery.
Just out of interest. I finally had my car checked with a tuner's diagnostics machine which apparently pics up quite a bit more information than the standard diagnostics machines at most agents, and they took the car for a drive while the diagnostics was being read, so basically a live read of what was all going on. This is what they found.
Engine is not pinking, the DISA flaps are fluttering and making constant corrections but incorrectly which is causing the pinking type noise and causing the engine to run less smoothly overall. Then more worryingly, the thermostat is not working properly and forcing the engine to run too cool, so there is some over-fuelling going on, especially on colder days. The Valvetronic motor is apparently 10% out of spec, not too sure what that means, but apparently can be sorted out with software, also not sure - ECU flash?! Cylinders 1 and 5 have some strange injector / valve behaviour, so either those injectors aren't working properly or the valves are not seating correctly - but this will need further investigation.
The first thing that needs to be done is to replace the two DISA flaps and the thermostat - then run tests again to see if this solves the problems.
At least now I know I am not imagining things!