E92 335d Drive / Boost Issues!
Discussion
Hi Guys,
Advice needed please - my mapped 335d has recently developed a problem which is more evident in the higher gears.
Car takes off fine in 1st, but when pressing the accelerator from 3rd gear and up there is a significant flat spot lower on the power band, and what feels like back pressure on the pedal making it harder to press.
I know the obvious answers are 1, a faulty small turbo actuator, or 2, turbo vacuum hose issues.
But the fact that the car takes off fine makes me think an actuator issue is unlikely, as I have had that in the past and it was evident in first at take off as well.
Also I have taken the car to a local garage with full diagnostic kit, and there are no error codes showing.
If there were vacuum hose leaks it would be showing an boost pressure error code apparently....
They guy in the garage suggested checking for gearbox software updates to see if that sorts it, but I find that unlikely.
I'm wondering if its DPF related - car has done around 117k miles, so its in that window where the DPF can give trouble. But I would have thought that if it was DPF related there would be error codes showing.
Maybe its just in my head, but the fact that the accelerator feels harder to push when the issue is evident is also a strange one.
Any advice or words of welcome!
Thanks!
Advice needed please - my mapped 335d has recently developed a problem which is more evident in the higher gears.
Car takes off fine in 1st, but when pressing the accelerator from 3rd gear and up there is a significant flat spot lower on the power band, and what feels like back pressure on the pedal making it harder to press.
I know the obvious answers are 1, a faulty small turbo actuator, or 2, turbo vacuum hose issues.
But the fact that the car takes off fine makes me think an actuator issue is unlikely, as I have had that in the past and it was evident in first at take off as well.
Also I have taken the car to a local garage with full diagnostic kit, and there are no error codes showing.
If there were vacuum hose leaks it would be showing an boost pressure error code apparently....
They guy in the garage suggested checking for gearbox software updates to see if that sorts it, but I find that unlikely.
I'm wondering if its DPF related - car has done around 117k miles, so its in that window where the DPF can give trouble. But I would have thought that if it was DPF related there would be error codes showing.
Maybe its just in my head, but the fact that the accelerator feels harder to push when the issue is evident is also a strange one.
Any advice or words of welcome!
Thanks!
Hmm, the actuator should throw up a warning and drop the car into limphome mode, or it normally would for an actuator fault.
The sticky throttle points to a problem with the throttle assembly itself. I know these are known to be troublesome and there was a recall for them I believe.
The throttle itself is fly by wire, so there's no mechanical link to the throttle bodies, so the pedal mechanism itself sounds to be an issue.
The sticky throttle points to a problem with the throttle assembly itself. I know these are known to be troublesome and there was a recall for them I believe.
The throttle itself is fly by wire, so there's no mechanical link to the throttle bodies, so the pedal mechanism itself sounds to be an issue.
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