I had started a post under Transmissions forum subsection but maybe this is a better place to ask. https://www.thirdgen.org/forums/tran...e-running.html

Here are my bits of questions:
Recently I had converted my 89 GTA to manual T56. Speedo working correctly with Dakota digital box and no codes.

1. Car drives fine as well, but immediately after the swap I'm noticing a gas or smell of running rich? Any ideas?

2. Do I need to do anything with my torque converter lockup wires/pigtail? Also, since the speedo signal from the transmission gets split to 2 places, one to the speedo and one to the ECM, I routed the dakota digital signal to the node before they split so I wouldn't have to run an extra wire to the ECM, is that ok to do? Does the speedo and ECM get the same signal? I'm not getting any codes and speedo is working fine.

3. I was advised to burn a manual .bin file, however, why would it run rich from the T56 swap? The power is there but I noticed if I rev it, the first blip it hesitates a very slightly and then revs fine. No hesitation elsewhere except the first blip from idle when revving. Could someone provide me with a technical explanation? Is it due to different inertial load because of the difference in weight from having a torque converter to now a flywheel?

4. Also, is there a quick way to determine if the car is wired to think it's in 'D' without me taking the center console out again?... (I forgot what I did to the 2 wires, orange w/blk stripe and black w/wht stripe, that should be unjumped for the ECM to think it's in 'D')

5. Do I need to even worry about those wires if my PROM is going to get tuned or uploaded with a manual .bin file?

 

Note that this is the DIY PROM board, so shouldn't be mentioning a tune from other then what you are doing.

For #1, check that the O2 sensor is OK. That the wire or sensor, or exhaust hasn't been damaged during the T56 install.

#2, as long as the signals are correct, PPM wise, should be OK. IIRC, the speedo gets a 4K PPM while the ECM is a 2K PPM signal. May be overdriving the ECM MPH signal.

#3, The weight difference and drag difference between a stick and auto is significant.

#4. Open the orange w/black stripe wire. This is in drive for a stick trans.

#5. yes

RBob.

 

Sorry about posting in the wrong section RBob. But as a final question: You are right the speedo gets 4K PPM and ECM gets 2K; I have the dakota digital output going to the VSS buffer, so the VSS buffer takes care of dividing the 4K PPM input to 2K for the ECM, is that correct?

 

Yes, the VSS 4 out buffer will divide the 4K down to 2K for the cruise & ECM.

RBob.