Ok, so after an effin' long hiatus, I've decided to do something with the gen 3.1.
I have a Ford 4.9L (300ci)in a 1978 Truck, and wanting to do away with the single barrel carb. Ford has made this engine up to 1996, and introduced EFI around '87. The engine is shot, bad rings, valve train noisy (maybe the crank?)... so located an 88 EFI 4.9L and will use it as the base for VEMS.
Idea is to be able to modify this engine (Cam, Exhaust, Turbo, etc... fun stuff ;) and have the EFI controller roll with the changes. I'll be doing this in steps, firstly get VEMS working with what's on the 4.9L and introduce enhancements later.
Stage one:
1. Inventory what I gots:
-I have a 1996 Distributor with a Hall Sensor in it, and 6 tooth wheel and trigger vane is smaller than the rest. more infohttp://oldfuelinjection.com/?p=25
-2x GM MAP sensors (1 for dynamic Barometric Pressure Correction). Going to gut one, and place the 2.5 BAR MAP sensor to bring it closer to the manifold.
-Coolant and intake temp sensors, with really high resistance, I may use the NTC temp resistors in them... or GM ones... not sure yet... More info: Coolant Temp http://oldfuelinjection.com/index.php?p=28 and Intake temp http://oldfuelinjection.com/index.php?p=29
-Ford 80mm MAF sensor pn: xl3f-12b579-ba I really want to use a MAF and not speed density, but not sure how I'm gonna incorporate it... AFAIK, most VEMS installs go with SpeedDensity. Meh, I'll wire it up, and decide later. More info: http://oldfuelinjection.com/?p=26
-Ford Stock 4.9L Knock Sensor http://oldfuelinjection.com/?p=34
-Ford Idle Air Control Valve PWM controlled. more info: http://oldfuelinjection.com/?p=39
-1996 Ford truck Power Distribution Box, to make things look neat.
-TPS, EGR, Fuel Vapour Canister purge, etc...
2. Build a schematic so I can build the Harness.
Stage Two:
-I have the 96 crank pulley with a 3 tooth vr sensor ford used for misfire. Plan is to remove the aluminum wheel, and add more standard missing tooth wheel (36-1?) and replace VR with Hall Sensor.
- Really OLD:
I'm gonna Try and Install a Genboard 3.1 into a Jeep Cherokee (XJ) with a 4.2L I-6 Engine (swapping out the 2.8L GM V-6) and [a GM HEI Distributor Mod] and the older 4.0l (Non-HO) I-6 Intake manifold with Individual Fuel Injectors per Cyl.
My Todo List:
- Update this page with Pics after I get a small Home Web server Going...
- Install Engine into Cherokee and get it running with the Carb.
- Install GM HEI from a Inline GM 6-cyl Distributer
- See if the Intake Manifold will bolt up to the Older Engine
- Brainstorm a trigger wheel... and Install the Genboard as the Winter project. maybe a 36-1 trigger wheel made from a discarded uhm... GM Auto trasmission thingy (I found a web site with info, but lost it...)
- Help with the VEMS-Group Documentation
- Get the Genboard to talk to my computer via the RS232 port
Anybody know if High Z or Low Z Injectors are better for Cold Weather Operation? (-40C to -50C) as I live in the Sub-Arctic...