This is a 0411 PCM in a 94 Jeep Wrangler with 6.0 LQ9. I was trying to use the PCM ABS speed signal to run my speedometer but it made my speedometer read way high so on the tune I changed my tire size to 20 and gear ratio to 7 which is as far as it would let me go. I then wrote the tune.
Now the vehicle wont start and the fuel pump relay chatters at a high frequency. I then went to rewrite the tune but the sofware says it cant find the PCM.
I then contacted HP tuners support but have not got a response yet. Are they not 24/7?
I then on hooked everything from the PCM except Power to C1 pin 20,57,19,75 and serial bus for tuner to connect on C1 pin 58. Still acts the same as above.