eCtune and jaw wideband reader
#1
eCtune and jaw wideband reader
I have ectune and a jaw wideband, ectune has the jaw listed as one of the options for wideband inputs jaw v out is set correctly jaw says v out is 1.47v double checked with fluke meter and it is correct. ectune says the v input for the wide band is 1.04v
I know that I can fix the a/f display by using the offset, but when I use the offset it also changes the lowest value a/f that ectune will display.
Eg. with the offset at 0 the lowest value a/f is 10.18 but with the offset set at 3 the lowest that it will read is 13.18.
this of course makes it hard to tune the areas of the map that I need lower a/f's
Anyone else have this problem?
the ecu and the wideband get the power and ground from the same wires.
I now i can buy a lc-1 and log with its seriel ou put directly in eCtune but i don't want to spend the cash!
Thanks for the help, Wes
I know that I can fix the a/f display by using the offset, but when I use the offset it also changes the lowest value a/f that ectune will display.
Eg. with the offset at 0 the lowest value a/f is 10.18 but with the offset set at 3 the lowest that it will read is 13.18.
this of course makes it hard to tune the areas of the map that I need lower a/f's
Anyone else have this problem?
the ecu and the wideband get the power and ground from the same wires.
I now i can buy a lc-1 and log with its seriel ou put directly in eCtune but i don't want to spend the cash!
Thanks for the help, Wes
#2
Re: eCtune and jaw wideband reader
Don't share power and ground wires. Those things are skinny, they can't handle peak load and you cause part of your problems.
Draw power from the fuse box, or battery. Run a seperate ground to the thermostat housing, where the ECU sensor ground is.
99% likely your 0.43v disparity is from resistance across your ground path @ the ECU wiring to the ground at the thermostat housing. The ECU compares voltage vs that thermostat housing sensor ground, not it's main power grounds or the unibody or somewhere under the dashboard or the negative terminal of the battery or any other failure ground electrical n00bs think work just fine.
Draw power from the fuse box, or battery. Run a seperate ground to the thermostat housing, where the ECU sensor ground is.
99% likely your 0.43v disparity is from resistance across your ground path @ the ECU wiring to the ground at the thermostat housing. The ECU compares voltage vs that thermostat housing sensor ground, not it's main power grounds or the unibody or somewhere under the dashboard or the negative terminal of the battery or any other failure ground electrical n00bs think work just fine.
#6
Re: eCtune and jaw wideband reader
I was having the same problem... even with a dedicated 18 gauge ground to the thermostat and power coming directly off the battery. I gave up on it. If you figure out the secret let me know. I'm thinking perhaps my other grounds aren't sufficient (corroded and wire strands broken from being 15 years old).
Edit: The other thing I noticed about it was the offset would fluctuate. At times it would be .01V, at others almost a full Volt.
Edit: The other thing I noticed about it was the offset would fluctuate. At times it would be .01V, at others almost a full Volt.
#7
Re: eCtune and jaw wideband reader
Originally Posted by TorganFM
I was having the same problem... even with a dedicated 18 gauge ground to the thermostat and power coming directly off the battery. I gave up on it. If you figure out the secret let me know. I'm thinking perhaps my other grounds aren't sufficient (corroded and wire strands broken from being 15 years old).
Edit: The other thing I noticed about it was the offset would fluctuate. At times it would be .01V, at others almost a full Volt.
Edit: The other thing I noticed about it was the offset would fluctuate. At times it would be .01V, at others almost a full Volt.
#9
Re: eCtune and jaw wideband reader
Originally Posted by MAJORAHOLE
i remember you having a hell of a time with that ----, i thought you had figured it out
#10
Re: eCtune and jaw wideband reader
Originally Posted by Joseph Davis
Run a fixed voltage to the ECU pin, use a regulator NOT a voltage divider, then see if it varies as you vary electrical load. That reveals bad grounds like no other.