ROE VEC1 questions

[motor602]

i had my VEC installed around january, and after coming home from school for the summer, ive noticed the guage is reading unusually lean. specifically at idle and on deacceleration it likes to hang out in the red, with its share of "light dances". Should i recalibrate? perhaps due to the change in weather?

 

[jimandela]

i am still learning how to calibrate mine.. but i would say yes time to reset it.
what are your settings right now?

 

[motor602]

they are about +10, -14 i think, not 100% on those numbers

 

[jimandela]

motor,

i was around +12-16
but i too have to reset mine seeing that i pulled the battery wire to do some
on the air filters
thanks
Jim

 

[Sean Roe]

The typical air / fuel meter characteristics are:
- Start up and for the first 30 seconds or so while the engine and O2's are warming up the LED will be Blue (rich).
- Once it heats up, the PCM goes into closed loop and the meter begins to cycle.
- As you approach full throttle, the PCM goes into open loop and the meter will stop scrolling and stay steady / move slowly.

The meter is converting the output voltage of the oxygen sensor to a colored LED. If the display is showing lean, that's the voltage the oxygen sensor is putting out. We have seen cars show lean when they're fuel filters begin to get clogged and injectors become dirty (higher mileage Vipers generally). The meters have also shown when an Oxygen sensor is bad or going bad, as the meter will not move as much or moves slowly.

I'd suggest you turn the knobs to 0/0 and see what the display does. From there, adjust as per the directions. If the car and or meter are not doing what's expected, begin looking for a reason. Call or e-mail if you need further help.

Regards,
Sean

 

[motor602]

thanks for the tips Sean, ill try doing what you have suggested.