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530d fluctuating revs when held at 1200rpm

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Old 10-24-2020, 05:31 AM
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Default Hi guys I know it’s bit too late to ask but did anyone sorted this issue?

Originally Posted by nickolas_g
Thought so..just for shiz and giggles I did the same thing today and got the same symptoms.

Hi,

i have been reading about this thread which I am having same issue as mine 530d with M57N also fluctuate at 1200rpm. I was thinking maybe high pressure fuel pump regulator or may be one of injectors is playing up. I did check with ISTA and INPA as well and all the injectors seems to work fine.
hope someone will reply on this thread.
also I did check the module of fuel pump which is absolutely fine.
Old 10-24-2020, 06:05 AM
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Do you notice a difference from when the a/c is on/off
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Old 10-24-2020, 06:48 AM
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Originally Posted by seanjordan20
Do you notice a difference from when the a/c is on/off
thanks for the quick message mate.
no I never thought about it. I will give it a go and if while a/c is on and fluctuations goes then a/c off and fluctuations back what does that means?
thanks
Old 10-24-2020, 09:25 AM
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It's an electrical/power issue you have to find. Either Alternator, compressor, battery issue. It's pulling more power than something can handle
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Old 10-24-2020, 12:19 PM
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Originally Posted by seanjordan20
It's an electrical/power issue you have to find. Either Alternator, compressor, battery issue. It's pulling more power than something can handle
mate I’ve done lots of things to be honest In last month
changed glow plugs and control unit
both thermostats
alternator
new battery
gearbox service
I am thinking about high pressure fuel pump regulator 🙂.
any thoughts please??


Last edited by Shahid Mehmood Jutt; 10-24-2020 at 12:21 PM.
Old 10-24-2020, 01:58 PM
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Have you serviced the gearbox? Have you tested your pump? Sadly, when you get fluctuation it's a prices of elimination. Do you have ista and INPA
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Old 10-24-2020, 02:13 PM
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I know what you mean 😞. But I don’t wanna let her go,I know she’s 16 years old now. Yeah I did service the gearbox with genuine ZF parts and I do have ISTA and INPA.
Have you got any ideas hence asking about ISTA and INPA mate?
Thanks a lot
Old 10-24-2020, 02:49 PM
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You shouldn't have and codes. I've know the map sensor, pump, alternator, battery or gearbox solve this issue. But have heard of other sensors solving RPM fluctuation issues.
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