EFI fuel losing fuel pressure.
Posted: Thu Jan 20, 2011 9:36 am
For some time now, my SD1 EFI hasn't maintained any pressure in the fuel rail after the pump stops. It drops to zero in seconds according to my gauge.
There are no signs of leaks anywhere in the pipework.
The tank was repaired after a leak and has a lifetime warranty.
The pump is new - bought from Ebay and slightly different from the Bosch one. Can't remember the make - it has a blue plastic case.
The regulator is a Malpasi (sp?) non rising rate adjustable.
Last year I removed the injectors and reassembled them to the fuel rail outside the engine, and saw no leaks from them.
The same fault was present with the original Bosch pump and FSE regulator. And before I fitted the MS and EDIS.
The MegaSquirt runs the pump for a few seconds at switch on - but this isn't long enough to achieve full pressure. When I made up the loom for the MS I modified the MS circuit so the pump runs when you operate the starter - as per original Rover flapper. Operating the starter switch with the car in drive runs the pump. Do this for about 15 secs then slip in into neutral, the starter operates and the car starts promptly. If you try and start it in the normal way, it churns and churns before starting.
There are no signs of leaks anywhere in the pipework.
The tank was repaired after a leak and has a lifetime warranty.
The pump is new - bought from Ebay and slightly different from the Bosch one. Can't remember the make - it has a blue plastic case.
The regulator is a Malpasi (sp?) non rising rate adjustable.
Last year I removed the injectors and reassembled them to the fuel rail outside the engine, and saw no leaks from them.
The same fault was present with the original Bosch pump and FSE regulator. And before I fitted the MS and EDIS.
The MegaSquirt runs the pump for a few seconds at switch on - but this isn't long enough to achieve full pressure. When I made up the loom for the MS I modified the MS circuit so the pump runs when you operate the starter - as per original Rover flapper. Operating the starter switch with the car in drive runs the pump. Do this for about 15 secs then slip in into neutral, the starter operates and the car starts promptly. If you try and start it in the normal way, it churns and churns before starting.