Analog input (i need help)

sim_ou_nao · Post by **sim_ou_nao** » Sat Mar 01, 2014 10:44 pm

i want to connect my wideband to my megajolt, ido what the guide say

but i still have 5v between this 2 points

this is ok, or a i do something wrong?

sim_ou_nao · Post by **sim_ou_nao** » Fri Mar 07, 2014 10:15 pm

can anyone help me?

toenee · Post by **toenee** » Sun Mar 09, 2014 12:45 am

I'm sure someone will be along soon, but just so you know your not alone, I've also held off doing this to mine, as I also didn't think the instruction was very clear.

Post by **brentp** » Mon Mar 10, 2014 6:14 am

Apologies for the late reply.

There might be a trace voltage remaining that you are measuring sourced from the processor. If you cannot measure any conductivity between the solder pad of R6 and the opposite side of where you cut, you should be OK.

Then, you should be able to connect the wideband to your megajolt and measure a value on the aux input.

Let us know what you find out!

sim_ou_nao · Post by **sim_ou_nao** » Mon Mar 10, 2014 9:51 pm

Thank you for the reply toenee and brentp

brentp, can i take out the resistor?

Post by **brentp** » Mon Mar 10, 2014 9:53 pm

Absolutely; you can take out the reistor as well. If the resistor is gone and you still measure 5v, I would not worry about it as it is likely stray capacitance or a weak pull-up on the microcontroller.

Alex B · Post by **Alex B** » Tue Mar 11, 2014 10:14 pm

Out of sheer interest, what are you aiming at with connecting a wideband? Advance correction based on the wideband's readings?

Alex

sim_ou_nao · Post by **sim_ou_nao** » Thu Mar 13, 2014 6:05 pm

no Alex, it´s only to help me tune my carb/needle (hif44).

Post by **brentp** » Thu Mar 13, 2014 6:20 pm

Keep us posted on how it's working!

sim_ou_nao · Post by **sim_ou_nao** » Fri Mar 14, 2014 9:57 pm

now i have 4 volt

Post by **brentp** » Sun Mar 16, 2014 6:30 pm

Keep us posed, and let us know what kind of readings you get after you connect your wideband system.

sim_ou_nao · Post by **sim_ou_nao** » Sat Mar 22, 2014 6:54 pm

Short test, with sucess

Now i have to find the misfire