I have a 74 Chevy Nova. I put a 2008 Silverado 1500 - 5.3 engine with E38 ECU.
I have 3 Question for you. I already been tuned with HP Tuner at a race shop.
1. I need to find the pinout from the E38 ecu to be able to have a signal for the speedo Any Idea Folks ?
2. Next question, I tried 3 pinout on the E38 ECU to find a signal for the speedometer, is that possible that we need to check or choose an option in the HP tuner program to put ''ON'' this signal (do we need to put manualy ON this signal to be able to have my speedometer Gauge (AutoMeter American Muscle Speedometers 1289) be able running ?
3. When I put my transmission on the Drive position, tranny supposed to upshift and downshit by itself.
My question : When I smash the electronic throttle pedal, I'm supposed to have a Kick Down on the tranny (from 4 to 3 speed by example), like a normal car do........all the 4 speed work correctly, but I'm not able to have this Kickdown, when I smash the throttle pedal, car goes faster (like normally) but not able to goes from 4 to 3 speed by itself)
Do we need to put manualy or check a box on the HP tuner somewhere to have this Kickdown working ?
Thanks for your help
Stephane