DIY_EFI Digest Tuesday, 9 January 1996 Volume 01 : Number 005 In this issue: RE: Ford Sierra Cosworth ECU Prom Re: Ford Sierra Cosworth ECU Prom New injection system See the end of the digest for information on subscribing to the DIY_EFI or DIY_EFI-Digest mailing lists. ---------------------------------------------------------------------- From: Brad_Miller@xxx.com (Miller,Brad) Date: Mon, 8 Jan 1996 11:28:48 -0500 Subject: RE: Ford Sierra Cosworth ECU Prom Hmm - - a problem that "I've been told" happens with some turbo cars, is that once your are honking them pretty good, the rings will sometimes align - - thus the thing will smoke a bit and loose some power. After you continue driving them "out of boost" the things will then move around and reseat to where they aren't aligned. Just my 2 cents worth . . . throw back the change . . . <*>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) Bradley Miller Xerox Business Services, Kansas City Midwest Shelby Dodge Automobile Club Inc. Email: Brad_Miller@xxx.com Alternate: Brad2dbone@xxx.com ------------------------------ From: sian@xxx.uk (RAGHBIR SIAN) Date: Mon, 8 Jan 1996 18:55:47 GMT 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" > > It very much sounds like the wastegate like Peter has pointed out, but they also have an uncanny habit of having faulty air temperature sensors. This in turn turns the amal valve to feed the wastegate continously. You did not say whether it is equiped with a catalytic converter, if it is then all the above apply plus the the mixture becomes very rich which can also have the same ish kind of effect. The other place i would look at is the MAP sensor inlet pipe (people snap and glue these ends) Regarding a copy of the original chip you could send me the modified chip and i can tell you what has been changed code wise. The data set that i have is for a GpN car. I disassembled this code including all the other cosworth's as well (sierra 3dr, sapphire 2wd, sapphire 4wd and the Escort cosworth) quit a while back. >From what i have seen from other proms is that nothing is hardly changed apart from the boost cut and reinstate, the rev limits and possibly the fuel map depending on the injectors. If you want some data on the prom i.e. locations for most of the calibration tables then let me know. I hope this helps. RAGHBIR SIAN "As Always A ***CONTROL*** Freak" Engine Control and Combustion analyst E-mail: sian@xxx.uk Mob. 0378 653098 RAGHBIR SIAN "As Always A ***CONTROL*** Freak" Engine Control and Combustion analyst E-mail: sian@xxx.uk www: http://www.bogo.co.uk/sian/home.html ------------------------------ From: eric_e@xxx.com (Eric Elliott ) Date: Mon, 8 Jan 1996 21:54:32 -0800 Subject: New injection system HI, GMC is selling an injection system that might be least difficult to adapt to your engine. The system does not need fuel manifolds nor injector mounts at each port. GM has V8 and Vsick systems in production now, using an injector pack within the intake manifold. Pressure operated spray valves at the intake ports are connected by plastic lines from individual injection solenoid valves within the pack. The fuel pressure regulator appears to be on the pack. A second unit within the intake manifold might include both the manifold air temp and pressure sensors. Eliminated are much external plumbing, sense lines, and some heat considerations. TRUCKIN’ magazine, volume 22, number 2, February 1996 has description and pictures, plus some info on the thoughts behind the OBD2 system hardware and software. Customer service phone is 714.693.1866 Before you ask, I bought TRUCKIN for the bikini. Eric Elliott ------------------------------ End of DIY_EFI Digest V1 #5 *************************** 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".