DIY_EFI Digest Saturday, September 18 1999 Volume 04 : Number 531 In this issue: O2 and water Re: DIY_EFI Digest V4 #530 Problem with an MPi Rover mini See the end of the digest for information on subscribing to the DIY_EFI or DIY_EFI-Digest mailing lists. ---------------------------------------------------------------------- Date: Fri, 17 Sep 1999 13:06:39 -0700 From: Bill Edgeworth Subject: O2 and water > > I recently read some messages claiming O2 sensors could be damaged by > > water in the exhaust stream. Is this true? Would it have to be liquid > > water, or would steam be a problem? I'm contemplating substantial water > Water is a byproduct of combustion and inherently will be in the exhaust gas. Perhaps what was being referred to was engine coolant, not water, which could damage the sensor. Bill Edgeworth ------------------------------ Date: Fri, 17 Sep 1999 23:06:43 -0400 From: "Gary Derian" Subject: Re: DIY_EFI Digest V4 #530 No. Constant delta P means constant fuel flow per unit time. You still need more fuel under boost. Gary Derian > > I intend referencing the the fuel pressure regulator from the surge > tank to ensure the pressure differential across the injector is > independent of boost pressure. Is it then correct to assume the > charge delivered for a given pulse width stays constant regardless > of actual boost? > ------------------------------ Date: Fri, 17 Sep 1999 20:26:34 +0100 From: Ade + Lamb Chop Subject: Problem with an MPi Rover mini Hi All, I have just joined this list but have been a long term member of the Mini-list (mini-list@xxx.net) Somebody on the Mini list (Tom Parker) recomended you guys as to help with a problem I have and to increase my general knowledge of Injection systems. I don't know how much actual Mini related stuff you guys know but here is some basic info which should help... What I have is a multi point injection system on a Rover A series engine which is a 4 piston 1275cc with a 5 port (2 inlet 3 exhaust) head the ECU has the following sensors, Crank postion, Cam shaft postion, MAP sensor, Engine coolant temperature, Intake air temperature, Throttle postion (potentiometer mounted on the throttle body) It uses and IACV (idle air control valve) which bypasses the throttle valve to control the idle speed. My problem is this. With the engine warm it tends to miss fire a little at idle and the pick up from idle is not instananious, it sounds as tho it pinks slightly then picks up. It is also blowing oil from the filler cap but I have checked the breather system (uses manifold depression but also has a connection to the filter side of the throttle body too) and all the hoses/oil seperators are clear. I look forward to learning as much from this this as I have from the Mini list... I looks like I am going to be looking after this mini for a long time.... Ade Lamb Chop 1989 heavily modified mini (Carb) Truffles 1997 Mpi Rover Cooper Sport (my Girl Friends) Situated in Southampton UK ------------------------------ End of DIY_EFI Digest V4 #531 ***************************** To subscribe to DIY_EFI-Digest, send the command: subscribe diy_efi-digest in the body of a message to "Majordomo@xxx. A non-digest (direct mail) version of this list is also available; to subscribe to that instead, replace "diy_efi-digest" in the command above with "diy_efi".