DIY_EFI Digest Tuesday, September 21 1999 Volume 04 : Number 537 In this issue: **Help with Ford 300 I-6 FI** Re: holly projection wire color FW: Vss on 165 ecm help! See the end of the digest for information on subscribing to the DIY_EFI or DIY_EFI-Digest mailing lists. ---------------------------------------------------------------------- Date: Tue, 21 Sep 1999 07:31:42 -0500 From: kimchi@xxx.net Subject: **Help with Ford 300 I-6 FI** Greetings. I have recently become the proud owner of a 1978 F-250 with the tried and true 300 inline-six. It's current factory-stock fuel & emissions specs: A. Carter YF-1V 1-bbl. carb. (unsure of CFM) B. NO SMOG EQUIPMENT - that's correct, lads & lasses - NONE, not even EGR or catalytic converters! It does have a PCV valve (does that qualify as smog equipment?), but, at the time the truck was built, it was considered a WORK truck, rather than a passenger vehicle, hence the absence of smog equip. I heard that Ford put out a fuel-injected version of this engine. True? If so, would junkyard browsing be my best bet for locating the necessary setup, and is this the most prudent way to go, or is there someone out there with a better suggestion? I'm an ex-USN electronics tech, and am not afraid of breaking out ye olde DMM and soldering iron, although I'll admit that digital wasn't my strong point. I live in Milwaukee, Wisconsin, and my quest is to improve the following: A. Drivability - throttle response is not exactly linear at the moment - there are a couple weak spots/stumbles as I depress the gas pedal. B. Emissions - it failed a previous IM240 smog check, mostly due to high HC and CO (a rich fuel/air ratio was the cause, I believe). Beyond just being able to pass the sniffer, I live in a high-population-density area, and I'd like to do my part to decrease emissions as much as possible without severely depleting my bank account. C. Winter startup/pre-full-operating-temperature drivability - it has a manual choke installed by previous owner - he told me that they don't make the proper thermostatic coils for this particular carb anymore. This is pretty much a non-issue to me, but if I had my druthers, I'd rather have a computer take care of this. (My techie streak showing through. :)) D. Economy - currently, with 295,000 miles on her (mostly highway), she is getting 13.9 mpg with 87 octane unleaded. I assume that this isn't out of line for a truck with this many miles, but I have a hunch that it can do better. Previous owner performed a compression check, and told me that all cylinders were within 10-15 psi of each other. (I assume that this is within spec.) Thanks in advance to all! Geoff [][][][][][][][][][][][][][][][] G. Turk Microsoft Certified Professional Windows NT Workstation 4.0 [][][][][][][][][][][][][][][][] ------------------------------ Date: Tue, 21 Sep 1999 10:22:10 -0500 From: "Robert W. Hughes" Subject: Re: holly projection wire color > Dose any one know what color wires go to power,ground,temp sensor? > I picked up a projection analog to put on my trailer puller, a 454 gmc dully. > I know its junk btw its better than a q-jet.thanks These are the colors for the 502-1 Pro-jection which is the early analog version: Power connector bundle1 red center hole of injector connector red center hole of injector connector orange outside hole of injector connector violet outside hole of injector connector single wires red +12v switched white - side of ignition coil (tach terminal on HEI) bundle2 red fuel pump connector-A green fuel pump connector-B Sensor cable black TPS-A blue TPS-B gray TPS-C these three are same length with pins installed, should already be in TPS connector if unit is used black ground - this one should have ring terminal on it brown temp sensor yellow idle solenoid pink crank terminal of starter solenoid polarity is important to fuel pump. Violet wire of cable goes to + terminal on pump, green wire goes to -. Note that Holley cleverly use different colors on each side of the connector. - -- Robert W. Hughes (Bob) BackYard Engineering Houston, Texas rwhughe@xxx.net ------------------------------ Date: Tue, 21 Sep 1999 12:46:23 -0400 From: Mike Rolica Subject: FW: Vss on 165 ecm help! Tanks :-) you guys are a lot of help! Helped get vats bypassed, works great! Now just vss! I would like to get a eprom burner/eraser but I need more background knowledge on code, hexadecimal, prog ect I'm embarssed to admit it but prog 101 was a little over my head. I'm good with tuning, how engine works, vol eff. Spark curve/cyl pressure vs rpm. Mike Hi Mike With the 89 165 ecm calibration methinks it needs a 2000 ppm open collector drive. If the led speedo drive is 0-12 volts then couple it via a 10k resistor to the base of a 3904, tie the emitter to gnd and use the collector to drive the 165 ecm. gl:peter ------------------------------ End of DIY_EFI Digest V4 #537 ***************************** 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".