rpm drops to zero

spyro · Post by **spyro** » Fri Mar 07, 2008 5:44 am

what can cause this ?
60-2 vr sensor
rc1 firmware

spyro · Post by **spyro** » Fri Mar 07, 2008 8:48 am

it looks like they are caused by iac moving

on other ocasions it always happens when the iac changes steps

i had to jumper resistors yesterday (the log is from monday)because the iac stoped to work after 5/6 min and it didnt work on moving only, im going to do a log with the iac moving only
is there any way to fix this if it happens on moving only ?

AbeFM · Post by **AbeFM** » Fri Mar 07, 2008 1:53 pm

Do you have any 'flyback' stuff? Diodes or some other circuit? It can send voltages back through the wires to mess with the board. Try unplugging the idle valve... See if it helps?

PhoB · Post by **PhoB** » Fri Mar 07, 2008 3:47 pm

Show "Batt V" line.

spyro · Post by **spyro** » Mon Mar 10, 2008 5:33 am

battery voltage stays +- constant drops 0.2v
im going to do some tests with iac unpluged
this drops only happens on warmup. i am using iac only on warmup

AbeFM · Post by **AbeFM** » Mon Mar 10, 2008 10:44 am

It's a stepper motor idle valve?

spyro · Post by **spyro** » Mon Mar 10, 2008 10:57 am

AbeFM wrote:It's a stepper motor idle valve?

yes

AbeFM · Post by **AbeFM** » Mon Mar 10, 2008 11:00 am

I'd think you're onto it then - make it move more and see if it gets worse, and unplug it and see if it gets better. If so, then you know it's electrical and what's causing it. That's how I found one of my problems....