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5th July 2020, 20:59 | #1 |
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Droning noise from underbonnet, fuel pressure regulator?
Hi all, my 04 cdti drones on the overrun, I'm led to believe it's a possible fuel pressure regulator problem?
The UBP has been replaced as it failed and I've also changed the fuel filter, no difference. Have also read a few threads but they didn't seem to actually conclude what the problem was? Do I need an earlier type regulator or is there a way to stop the droning noise, maybe with a weight or dampener to absorb the frequencies? |
6th July 2020, 15:14 | #2 |
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It's a well known issue with some Mk2 diesels and although the fuel pressure regulator is implicated, fitting a Mk1 regulator isn't guaranteed to fix it. Seems worth a shot though, cos it drives you mad, apparently.
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6th July 2020, 19:47 | #3 |
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It only drones on the over run.---
Why should that make a difference. The regulator works all the time. Got any loose bits under the bonnet ?--- |
6th July 2020, 20:06 | #4 |
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6th July 2020, 20:42 | #5 | |
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6th July 2020, 21:43 | #6 | |
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Interesting to see all the other manufacturers that use that same pump, wonder if they've had issues other than the BMWs mentioned in the thread. https://www.ebay.co.uk/itm/333151619688 |
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7th July 2020, 07:34 | #7 |
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6th July 2020, 20:41 | #8 | |
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Foot flat to the boards and there isn't a squeak from it, once the fuel pressure isn't required it moans away until I feel sorry for it and floor it again. But yeah, after a while the novelty wears off. Did the pipework change on a mk2 or literally just the regulator? Would a remap help in that it might change the behaviour of either the pump pressure regulator, or if present, the one on the injector rail? |
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