ekwan 70 Posted May 30, 2019 Report Share Posted May 30, 2019 (edited) On 22/05/2019 at 03:44, Andyww said: Just noticed something on the spec of the pump in the link above. This is an 8 bar pump. Thats over 100 PSI! The fuel pressure regulator limits the pressure to 4 PSI. So the pump will be strangled, trying to pump far more than needed, and use a high current causing it to fail. That would likely be the cause of failure. pump too high spec. Were all 3 pumps this spec? Did the supplier specify for the Esprit because if they did, they are liable for the failures. The correct pump should be 2 bar or so. Fuel pump pressure is dependent on flow rate. They don't operate at constantly max pressure. Edited May 30, 2019 by ekwan Quote Link to post Share on other sites
Lotusfab 3,314 Posted October 22, 2019 Report Share Posted October 22, 2019 Hi Steve I have just had a brand new Sytec pump fail! It makes a rattle noise when shook. The fuel system is spotless. It makes a huming noise, was very loud and vibrated a lot in use. It got very hot in operation. If I had to guess I would say the output preesure and flow is too high. I have ordered a different type and will try again with an inline filter. I may well take the pump apart to see why it failed! Frustrating it cost £100 and lasted a few starts! Quote Link to post Share on other sites
Steve4012 191 Posted October 22, 2019 Author Report Share Posted October 22, 2019 What a pain Fabian. I ended up getting one from Steve at SJ which seems ok at the moment but has had very little use so far. Quote Link to post Share on other sites
Lotusfab 3,314 Posted October 22, 2019 Report Share Posted October 22, 2019 Yep. I ordered a new one from SimonBBC on ebay. Im starting to think many new parts are not suitable for the claimed application. Im fitting an inline filter before the pump. Trouble is inside the pump is spotless so that wasn't the cause of failure. Quote Link to post Share on other sites
Lotusfab 3,314 Posted October 22, 2019 Report Share Posted October 22, 2019 The new pump has a lower flow rate. Quote Link to post Share on other sites
greentengu 14 Posted December 4, 2019 Report Share Posted December 4, 2019 (edited) Just finished reading this thread, and am waiting with bated breath to hear the outcome. Any updates on this topic? Cheers, Scott Edited December 4, 2019 by greentengu Quote 1986 Esprit HCI (Bosch-injected) Link to post Share on other sites
Lotusfab 3,314 Posted December 4, 2019 Report Share Posted December 4, 2019 Hi Scott. If you mean my fuel pump I have installed the new one and so farvworking perfectly. The orginal pump must have had a manufacture defect. Quote Link to post Share on other sites
pete 1,975 Posted December 4, 2019 Report Share Posted December 4, 2019 On my 85 turbo after the original pump packed up I had another 2 in quick succession before a third that was still ok when I sold the car Quote hindsight: the science that is never wrong Link to post Share on other sites
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