Quote:
Originally Posted by GGR
Thanks Barri. In fact I have two spare Djet pumps but I was wondering if there is any kind of servicing I could do to one of the spares before fitting it. I also have a spare CIS pump. Which one should I fit in view of my future Megasquirt set-up (with Djet rails and hose top injectors)?
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You can remove the end and clean up the rollers and rotor. You can also flush the internal passages around the motor. See
THIS LINK.
The CIS pumps can put out a lot more pressure than the D-Jet pump. The D-jet pump also has an internal relief valve, while the CIS pumps do not. This is presumably because the rubber hoses on the D-Jet injectors and elsewhere could blow off if they see higher pressures. This could happen, I guess, if the fuel pressure regulator malfunctioned or the fuel return somehow became blocked.
There is a check valve that prevents pump from pumping backwards - not sure how those who suggest reversing the pump overcome that.
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Graham
85 300D
,72 350SL, 98 E320, Outback 2.5