Discussion
Hi PHers,
I recently had the airflow mass sensors replaced on the M5. The first replacement set that was put on there caused some idling problems (the car kept cutting out when stopping at junctions etc), so took the car back and got them changed. This sorted out the idling problem but the car then felt a bit low on power, so I took it back again, and asked for them to check whether it was fuelling correctly.
Just heard back from the garage, who had put it on their rolling road, and they said that the fuel mix was fine. However, they asked me what the bhp should be (I told them 395bhp) and they said it was coming out at 336bhp, but that was without the 'power button' (presumably sports mode).
Does anyone know whether the sports mode increases the horsepower available (I know the E60 goes from 400 as standard to 500+ in M mode)? If so, does 336bhp sound reasonable?
As background, the car is 11 years old with just under 70k on the clock. I had a compression test done recently, and though one bank was lower than the other, the pressures were acceptable across all eight cylinders. The replacement sensors were Bosch, not OEM, but I think Bosch supply BMW anyway.
Also to add, it is running on 99-ron (but it feels like it's on standard unleaded, which is why I took it back).
Any info, thoughts or ideas gratefully received...!
I recently had the airflow mass sensors replaced on the M5. The first replacement set that was put on there caused some idling problems (the car kept cutting out when stopping at junctions etc), so took the car back and got them changed. This sorted out the idling problem but the car then felt a bit low on power, so I took it back again, and asked for them to check whether it was fuelling correctly.
Just heard back from the garage, who had put it on their rolling road, and they said that the fuel mix was fine. However, they asked me what the bhp should be (I told them 395bhp) and they said it was coming out at 336bhp, but that was without the 'power button' (presumably sports mode).
Does anyone know whether the sports mode increases the horsepower available (I know the E60 goes from 400 as standard to 500+ in M mode)? If so, does 336bhp sound reasonable?
As background, the car is 11 years old with just under 70k on the clock. I had a compression test done recently, and though one bank was lower than the other, the pressures were acceptable across all eight cylinders. The replacement sensors were Bosch, not OEM, but I think Bosch supply BMW anyway.
Also to add, it is running on 99-ron (but it feels like it's on standard unleaded, which is why I took it back).
Any info, thoughts or ideas gratefully received...!
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