Since the car I want to upgrade is my daily driver, I'm taking a measured approach to the project. I'm going to get started by building my harness. Car is a 99 Grand AM with a 3400. Here's what I can assemble that I need to get for the harness:
2 input - RPM
Cam sensor
Crank sensor
intake sensors
Mass air flow
Manifold absolute pressure
intake temperature
throttle position
output
idle control
6 injectors
ignition advance (2 connectors on the GM DIS?)
fan
fuel pump
According to the Jaguar readme there are core inputs '7 Standard 'CORE' analog inputs (IAT,MAT,CHT,TPS,EXO,BRV,MAP)' and I'm assuming I'm missing some. Someone who speaks geek would be helpful to elaborate the additional sensor data I'm missing.
Last edited by Fred on Fri Apr 19, 2013 8:02 pm, edited 1 time in total.
Reason:Improved formatting.
Re injectors, you can run it batch if you want, but that sucks. Split it up into 6 individual wires for sequential later, then join in 3 pairs at the ECU.
Have you already ordered a TA card? If not, you should probably get a Jaguar from Andy... If so, you should probably get a Jaguar from Andy anyway... it's custom made for your engine and setup. TA == pain. Ask anyone that's done it. It's fun, but difficult to get right. I hope Sim and Peter and Preston and Sean and I all say something about this. I just did, so that's me covered. Preston's in Dubai, so we won't hear from him again. RIP Presto. The rest? Speak up :-)
Oh, I'm building with the Jaguar to spec, I've forked it on github just to draw attention. I also hope to run the board Sean has on his rail first to get the numerically least spot on the 'cars running FreeEMS' list possible. My biggest concern is what hardware I need to be running to commit to vanilla. I'm hoping to win 'Most PCBs run on a single car'.
In order to get it to run I'm going to need a separate or integrated controller for the electronically controlled Tranny. That's right I need to patch in that D sub transmission plug to control voltage to a gate to engage the transmission and then one for FWD/REV and 2 to shift from first to third. My transmission interface will be that of thumb slaps that engage up/down shifting, probably just get some dorky button on the steering wheel for reverse.
DIY HW is pretty tedious to do. The worst part is when you have a problem it's fairly hard to track down, and it's a very do it yourself problem. Verses a do it together problem where you can ask many different people for help. On my first FreeEMS ECU I couldn't figure out why my BRV circuit wasn't reading a value, and I never did figure it out. I ended up having to solder together another BRV circuit somewhere else on the board. The analog circuit areas turned into rat's nests on both my boards, despite my best efforts to keep them pretty. On my latest board I used the same diodes that they're using on the Ravage board for protection of the adc pins. Quite the royal pain to solder a lot of small surface mount packages to a through hole proto board. Also I started having a strange sync loss problem after several months of using it as a daily driver. I either left some flux that was conducting some electricity between a few pins, or I didn't get one of the tiny legs of the MAX9926 chip soldered down very well. Either way I'm guilty of some poor quality control.
When I was first thinking about DIY HW I think Fred tried to talk me out of it. I remember him saying something about most people who buy TA cards never get a working ECU built. I took that as a challenge, but I now understand why it's true.
Fred wrote:Have you already ordered a TA card? If not, you should probably get a Jaguar from Andy... If so, you should probably get a Jaguar from Andy anyway... it's custom made for your engine and setup. TA == pain. Ask anyone that's done it. It's fun, but difficult to get right. I hope Sim and Peter and Preston and Sean and I all say something about this. I just did, so that's me covered. Preston's in Dubai, so we won't hear from him again. RIP Presto. The rest? Speak up
Fred- sorry to butt in here (long time watcher, first time poster) but Does Andy have Jaguar boards? I'm asking because I have several GM 60degree V6 projects?