vannatta20

iTrader: (4)

I measured the voltage from the Lm1 with a volt meter and it shows 1.7 volts. Hptuners shows 5 volts with the analog wire when connected? When I turn off the wide band it goes back to zero. This is an engine swap harness and LM1 analog output wired it directly to pin 55. Is it a ground issue with the analog out?

vannatta20

iTrader: (4)

I tried hooking up through the A/C as well. The A/C voltage stays at zero even though its getting 1.7 volts to the A/C pin in the ECU. Really confused....

Phil'sC5vette

iTrader: (4)

this is the offset I use for tuning with my LM1

The offset I use is:
[0.00] volts at AFR [10.0]

[4.996] volts at AFR [19.99]

Yes you are correct when you add 5 and 20, it will change it to 4.996 and 19.99

Dragman

Mine set about the same on mine. Ground connection's will give u a fit in trying to get LM1 and HP Tuner scanner AFR the same.

camscam02

iTrader: (21)

My lm1 in hp tuners is real noisy in high gear when I make a pass... anybody come across this?

vannatta20

iTrader: (4)

I'll try those numbers today. By the way the stereo connecter I am using is from radio shack. (I bought the lm1 used) I figured it should use a standard head connecter. Do I need to ground the ground wire from the stereo jack? I tried and it made no difference with the readings...

Dragman

I would say yes and would ground it to same place the LM1 is grounded!