DIY_EFI Digest Monday, 8 January 1996 Volume 01 : Number 004 In this issue: Re: Electronic Ignition Ford Sierra Cosworth ECU Prom Re: Ford Sierra Cosworth ECU Prom Re: Electronic Ignition See the end of the digest for information on subscribing to the DIY_EFI or DIY_EFI-Digest mailing lists. ---------------------------------------------------------------------- From: jwharris@xxx. Harris) Date: Sun, 7 Jan 96 09:51 EST Subject: Re: Electronic Ignition >Allegro Microsystems makes the chip used in the 7 pin GM module. I was told that this is an aftermarket copy of our chip. - ---------------------------------------------------------------------------- J.W. Harris Delco Electronics Corp. Project Engineer One Corporate Center Powertrain Electronics M.S. CT40C Kokomo, IN 46904-9005 jwharris@xxx.com jwharris@xxx.com Of course, all responses are my own and should not be mistaken for those of Delco Electronics or General Motors. ------------------------------ From: Clint Sharp Date: Sun, 7 Jan 1996 17:38:41 GMT Subject: Ford Sierra Cosworth ECU Prom A friend has just acquired a 1989 Ford Sierra Sapphire Cosworth and is experiencing some problems with the turbo. If the car is driven on boost then all is fine until it comes off boost. When he accelerates again the turbo doesn't produce any boost (at least it doesn't feel like it, no spine snapping acceleration) and acts like a fast 2l car. Any suggestions? (I've been elected to fix it as he thinks it's an electrical fault) The ECU has been modified and he hasn't got the original chip. Does anyone have a copy of the standard chip they can mail me? Any suggestions as to the cause of the problem would be gladly accepted. - -- We apologise for the lack of coherent humorous comments. Normal service will be resumed shortly. clint@xxx.uk ------------------------------ From: pjwales@xxx.net (Peter Wales) Date: Sun, 07 Jan 1996 20:30:56 -0500 Subject: Re: Ford Sierra Cosworth ECU Prom >A friend has just acquired a 1989 Ford Sierra Sapphire Cosworth >and is experiencing some problems with the turbo. If the car is >driven on boost then all is fine until it comes off boost. It sounds like the wastegate actuator is sticking and leaving the wastegate open. It'll stay that way until the turbo cools off. Contact ian Sandford at Superchips on 01280 816781 for a standard chip. He'll do one cheap for you if you want it. Peter Wales President Superchips Inc Chairman Superchips Ltd "Timing is everything" ------------------------------ From: dn Date: Sun, 7 Jan 96 22:29:01 MDT Subject: Re: Electronic Ignition > I was told that this is an aftermarket copy of our chip. > ---------------------------------------------------------------------------- > J.W. Harris Delco Electronics Corp. I stand corrected. I wasn't aware that Delco made their own chips. The statement I made was based on the fact that I had hung a scope on a 7 pin module, and it behaved exactly as the datasheet said it would, and also in a telephone conversation with an Allegro applications engineer a while back on an unrelated topic, he mentioned that most of the automotive chips they sell are to major automobile manufacturers. I was trying to convince him that while I wasn't GM, and I likely wasn't going to buy a million chips, he should send me some evaluation samples anyway. I asked him directly who he was referring to, but he wouldn't tell me. (note how I did get you to say that this is the type of chip Delco uses even though you said you couldn't confirm this in an earlier thread!) The point is kind of moot, however, since the original question was about pickups and how they work, and aftermarket or not, it still has to behave identically to the original. (at least in theory, other concerns such as reliability, etc. come into play). Allegro may even be a licensed second-source for the part. The data sheet has some information on how to interface to the device, which should come in handy to anyone trying to understand the workings of the HEI. ps how is your ECM project coming along? dn - -- ------------------------------------------------------------------------- Darrell A. Norquay Internet: dn@xxx.ca Datalog Technology Inc. Bang: calgary!debug!dlogtech!darrell Calgary, Alberta, Canada Voice: +1 (403) 243-2220 Fax: +1 (403) 243-2872 @ + < __/ "Ain't no substitute for clock speed or compression ratio" ------------------------------------------------------------------------- ------------------------------ End of DIY_EFI Digest V1 #4 *************************** 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".