lb7 pto switch sends idle to redline after flash
I have installed a pto switch to my ecm to use the cruise control switch to elevate idle in cold temps to keep the truck warm. after I reflashed my ecm to compensate for change in gear ratio, when I use the pto switch the engine hits the rev limiter until I turn it off. I checked the pto setting in my flash and it is set to 2200 rpm. What am I missing? by the way the only thing I changed is the gear ratio and speedometer pulses. Has anyone know anything about this?
If you put the stock/previous tune in it, does it do the same thing?
Al
"Trash that carb and get Injected!"
No if reload the stock tune it works fine.
Really no answers?
What year truck and is the modded tune your flashing in a different OS than your stock one or is it your stock one modded?
1995 GMC 2500 SUBURBAN powered by 01 DURAMAX/ALLISON, little of this, a little of that,
DIAMONDEYE 4" exhaust, CORSA muffler, AFE stage 1 dry filter, custom tuning by me, KENNEDY single pump and pump rub kit.
2004, no OS change. just speedo.
Has anyone used a PTO on a LB7 with efilive?
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