CJ1 Posted May 23, 2017 Share Posted May 23, 2017 My 1996 4.6 V8 Gems engined P38 has developed a bit of a strange issue over the last 5 months. It has mostly been parked up, but when on 5 occasions now where it hadn't been started or driven for many weeks, the brake pedal had virtually no pressure and all 3 ABS, Handbrake and Traction lights would display with the pedal pressed, I always check my brake pedal pressure before driving luckily, but that normal noise the accumulator makes stays on for quite a long time building up the pressure, then once it as had its long hissy fit, the brakes work perfectly, the warning lights don't come on when you press the pedal anymore, and no grief at all. Is it common for the accumulator to lose pressure while the car is parked up? The battery was disconnected every time. Cheers in advance for any advice. Quote Link to comment Share on other sites More sharing options...
Blanco Posted May 23, 2017 Share Posted May 23, 2017 Mine is a bit the same (not quite as bad by the sound of it), the pressure in the accumulator pushes the fluid back into the reservoir, worn seals I guess. Haven't yet looked at what the fix would involve. Not sure it wouldn't happen anyway over time. My pump runs for about 40 secs if its totally flat, I guess a worn pump would take longer? Don't you get more issues from disconnecting the battery than not? Quote Link to comment Share on other sites More sharing options...
CJ1 Posted May 24, 2017 Author Share Posted May 24, 2017 I didn't have a choice but to disconnect the battery for a while as it kept going flat anyway due to the RF receiver waking the car up too often. But no problems that I could see came from disconnecting the battery regularly. Quote Link to comment Share on other sites More sharing options...
Tanis8472 Posted June 4, 2017 Share Posted June 4, 2017 Accumulator bulb (£100 ish) is knackered. Keeping it running like that will wear the pump out. Much dearer than the bulb to replace (£800-£1000 new). Mine is due Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted June 4, 2017 Share Posted June 4, 2017 I'll plug Martin at www.rrparts.co.uk for odd bits of P38's, he should have a good used one on the shelf if anyone does. Quote Link to comment Share on other sites More sharing options...
CJ1 Posted June 4, 2017 Author Share Posted June 4, 2017 Is this what you call the bulb? http://www.ebay.co.uk/itm/400365295389?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT Quote Link to comment Share on other sites More sharing options...
David Sparkes Posted June 4, 2017 Share Posted June 4, 2017 52 minutes ago, CJ1 said: Is this what you call the bulb? http://www.ebay.co.uk/itm/400365295389?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT Yes. Good Luck. Quote Link to comment Share on other sites More sharing options...
Tanis8472 Posted June 4, 2017 Share Posted June 4, 2017 It is, but here is cheaper by £13 Its made by wabco who make the original ones. http://www.island-4x4.co.uk/pump-accumulator-wabco-stc2784-p-1024.html Quote Link to comment Share on other sites More sharing options...
CJ1 Posted June 4, 2017 Author Share Posted June 4, 2017 Thanks. I was just using that link for reference so I knew what you were talking about lol 1 Quote Link to comment Share on other sites More sharing options...
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