LB72004
February 13th, 2012, 07:43 PM
anyone out there find the DSP output not always turning on as programmed?
right now i am trying to use it to activate a relay to power a lift pump and water injection pump. i set it up to activate when at 17 PSI boost [A0120 DSP output boost min] but it turns on during idle. from logging it shows that i am only at 14.65 lbs of boost at idle. at first i thought well i just need to add the atmospheric presser to the 17 lbs of boost i want it to activate at and see if that works. so i set it 34 lbs for good measures and now it activates on average of 14.90 lbs of boost (just barely above idle). at this rate i am going to hit the 72.5 lb limit before it ever activates where i want it to. i am going to set it higher but it shouldn't need to be this high for 17 lbs of boost.
i tried the [A0116 DSP output TPS min] & [A0118 DSP output RPM min] and it works as expected. the only one that seems to be wacky is the [A0120 DSP output boost min].
any one have similar results using the DSP output? did you figure out a solution to this?
Thanks
Jason
right now i am trying to use it to activate a relay to power a lift pump and water injection pump. i set it up to activate when at 17 PSI boost [A0120 DSP output boost min] but it turns on during idle. from logging it shows that i am only at 14.65 lbs of boost at idle. at first i thought well i just need to add the atmospheric presser to the 17 lbs of boost i want it to activate at and see if that works. so i set it 34 lbs for good measures and now it activates on average of 14.90 lbs of boost (just barely above idle). at this rate i am going to hit the 72.5 lb limit before it ever activates where i want it to. i am going to set it higher but it shouldn't need to be this high for 17 lbs of boost.
i tried the [A0116 DSP output TPS min] & [A0118 DSP output RPM min] and it works as expected. the only one that seems to be wacky is the [A0120 DSP output boost min].
any one have similar results using the DSP output? did you figure out a solution to this?
Thanks
Jason