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Originally Posted by doctorstupid
Currently the car (94 TT) has stock injectors and MAF installed, emanage ultimate with the injector and ignition wires all intercepted for add/trim fuel adjustment. I cannot get an RPM signal from the rpm wire specified in the first post of this thread, nor greddy's manual (they are in fact 2 very different wires). I can only get rpm with the crank angle sensor, which is fine by me unless this is interfering with something.
Now I do not have the injector harness installed, as this wasn't brought to my attention as being necessary until 20 minutes ago (whoops).
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If, in that last sentence, you mean the injector adapter, then yes, I belive you MUST have it installed. But my frame of reference is OBD 1, so it may be different for your car. Without the adapter, mine ran really rich to the point I had to lean it out a lot. Then with the adapter, I had to throw away my tuning-to-date, and add a lot more fuel back in. Without the adapter, I also got a CEL (based on the injectors.)
If your car is like the first gens, then you need the adapter for sure.
Not sure why you can't get the rpm signal from the rpm wire. I had all the wires connected, and got the rpm signal from each of the drop-down box options. But the crank angle sensor caused other rpm signal problems, so I went back to the rpm wire itself.
Erik