DIY_EFI Digest Monday, August 23 1999 Volume 04 : Number 483 In this issue: Re: Newbie question, slightly off topic. Re: DIY_EFI Digest V4 #482 Holley Pro-Jection Bulletin Board Re: DIY_EFI Digest V4 #482 out for a week See the end of the digest for information on subscribing to the DIY_EFI or DIY_EFI-Digest mailing lists. ---------------------------------------------------------------------- Date: Sun, 22 Aug 1999 13:56:08 -0700 (PDT) From: Orin Eman Subject: Re: Newbie question, slightly off topic. > The scenario is this. I installed a anti-hijack/tracking unit > in my car (Audi-EFI). The immobilizer relay (to disable the car > in event of an hijack) is connected in series with the booster > pumps' fuse, ie when the car is immobilized the main fuel pump > will run dry. > When this happens what damage will be caused to the engine systems? > I'm quite willing to accept an amount of damage in return for recovering > my car, and the immobilizer will only be actived with my constent, > but knowing what will break would be nice.... ;-) > Does anyone know whether the fuel pump is switched off immediately when the > engine dies of fuel starvation? Usually, yes. It's in case of an accident so you don't end up spraying fuel all over the place if a fuel line breaks. The engine stalls, the fuel pump is turned off. Note that overboost protection is achieved in most turbo Audi models by cutting power to the fuel pump (only fuel pump in this case), so I wouldn't expect any problems. Orin. ------------------------------ Date: Sun, 22 Aug 1999 17:30:46 EDT From: Mikepoore@xxx.com Subject: Re: DIY_EFI Digest V4 #482 In a message dated 8/22/99 3:24:22 PM Eastern Daylight Time, DIY_EFI-Digest-Owner@xxx.edu writes: > The scenario is this. I installed a anti-hijack/tracking unit > in my car (Audi-EFI). The immobilizer relay (to disable the car > in event of an hijack) is connected in series with the booster > pumps' fuse, ie when the car is immobilized the main fuel pump > will run dry. I think you are mistaken. The fuel pump won't run dry, but the power to the pump will be cut off. If the power to the pump is cut off, I don't see any danger in damaging the engine. It should stall immediately. If on the other hand the pump were to run dry, it would be like running out of gas. They say running a fuel pump out of gas can cause damage if the pump is allowed to continue running dry, i.e. the ignition key were left on for an extended period of time. Even if that were the case, some systems, I think, will stop the fuel pump if the rpm were 0. If the hijackers have guns, I would hope they get a couple of blocks before the engine stops because they might not be happy with you if you foil their plan. Mike Poore ------------------------------ Date: Sun, 22 Aug 1999 19:03:53 -0400 From: "Orin Harding" Subject: Holley Pro-Jection Bulletin Board This is a multi-part message in MIME format. - ------=_NextPart_000_0049_01BEECD1.1388B940 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable A bulletin board for Holley Pro-Jection users has been opened at = http://www.autochart.com.=20 Orin - ------=_NextPart_000_0049_01BEECD1.1388B940 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

A bulletin board for Holley Pro-Jection users has = been opened=20 at http://www.autochart.com.=20

Orin

- ------=_NextPart_000_0049_01BEECD1.1388B940-- ------------------------------ Date: Mon, 23 Aug 1999 00:20:04 EDT From: JCsDOOR@xxx.com Subject: Re: DIY_EFI Digest V4 #482 In a message dated 8/22/99 7:24:22 PM! First Boot!, DIY_EFI-Digest-Owner@xxx.edu writes: << Newbie question, slightly off topic. >> if you are going to disable a pump make it the main pump. Do so by removing ground from pump relay the Eng. will just lean and die if pump goes down. However if you kill the pre pump you may find that your Eng. may not stop. The main pump will probley die as soon as tank gets low, though I have seen them run with the pre pump out for months. Jim crance JCsDOOR@xxx.com Colorado springs,CO, ------------------------------ Date: Mon, 23 Aug 1999 00:26:03 -0500 From: steve ravet Subject: out for a week I'll be in merry old England for a week, so I probably won't be responding to emails about the WWW pages and things. In the meantime you can contact Mr. Gwynne, but please only if it's an emergency. I've unsubscribed from the lists for the duration also. - --steve - -- Steve Ravet steve.ravet@xxx.com Advanced Risc Machines, Inc. www.arm.com ------------------------------ End of DIY_EFI Digest V4 #483 ***************************** 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".