DIY_EFI Digest Sunday, October 31 1999 Volume 04 : Number 613 In this issue: Re: DIY_EFI Digest V4 #611 Limp home mode on GM systems See the end of the digest for information on subscribing to the DIY_EFI or DIY_EFI-Digest mailing lists. ---------------------------------------------------------------------- Date: Sun, 31 Oct 1999 11:40:06 +1300 From: "Nicholas Parker" Subject: Re: DIY_EFI Digest V4 #611 Hi List, I have written an ecu in assembler for 80c552, but I now have a Dallas 80c550 (8x faster or so). Its for a 4 cyl, two coil, sequential injection etc. I haven't implemented 'acceleration enrichment' yet. Can somebody please give me some guidelines, ie: The car I designed the ecu for is a supercharged Toyota MR2 mk1. so It kind of operates in both modes...that is both forced induction, and natural aspiration bue to an electromagnetic supercharger clutch, and a supercharger bypass. Thanks, Nick Parker. ------------------------------ Date: Sat, 30 Oct 1999 22:09:58 -0500 (EST) From: Mike Comai Subject: Limp home mode on GM systems I'm putting a GM '747 system into a 1979 CJ5. I was curious if anyone new what sensors/systems the ECM uses when it enters limp home mode. I noticed that on the schematics it looks like the fuel pump is running all the time when the oil pressure switch is closed(i.e. bypasses the relay) and the only reason I can think for that would be if the ECM fails or enters L.H.M., or the relay fails. I just wanted to make sure that I think of all the angles when I do the install, and I'd appreciate any more info on L.H.M. or any other odities that aren't easy to see. Thanks, Mike Comai ------------------------------ End of DIY_EFI Digest V4 #613 ***************************** 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".