[ijames]

I reinitialized the rpm converter with my desktop pc making sure the volume was all the way up, since I'm not positive it was the first time, and for whatever reason now the rpms are pretty much dead on with ds - there's a little noise on each one but they seem to average the same by eye :-). Also wired into the stock map while I'm waiting for my 3 bar to arrive. There is a big, double row connector directly above the kick panel where the ecm sits. Open the glove box, empty it out, release the catch on the left and let it open all the way. Reach in and to the right and there's the connector. The light green wire on pin A on the longer of the two plugs is the MAP signal, headed towards the factory boost gauge. Lift the ears and unplug that plug (unplugging the other one gave me more slack which made connecting things easier but you don't have to), lift the little ears on the sides that lets the cover flip open to expose the wire ends of all the pins, slide a small pick or hex key in beside the pin from the non-wire side (:-)) to depress the little ear and the pin slides right out. I wrapped wire around the crimp and just stuffed it back in for now; it seemed to fit snugly and I wire tied the two wires together for strain relief. You could easily solder the new wire to the exposed part of the green wire if you want. Snap it all back together and run the new wire to the aux input and you're in business.

I have about a 0.13 V offset in the grounds at the LM1 power/cigarette lighter and the tps gnd at the ecm connector but I just used a custom calibration for that channel to make the lm1 and ds agree at 0.40 and 4.68 and a couple of points that I checked in between were right on. I'll calibrate the 3 bar map sensor with a gauge and tire pump when I get it. Also, I guess if I'm ever going to wire the lm1 in permanently so I don't have to remember to turn it on each time, I should do that now since I'm sure that will change the offset. I did notice that my inverter for my laptop puts out maybe 0.2 V worth of noise onto the tps signal when it is turned on. I have it plugged into a Y along with the LM1, in the cig lighter; don't really know what to do except ignore the noise or run the laptop off of the battery if I want max accuracy. It also shifted the map but didn't seem to move the rpm.