[Author Prev][Author Next][Thread Prev][Thread Next][Author Index][Thread Index]
Re: Dangling Wires
> Orin Eman wrote:
> If the ECU sees this value for a few seconds
> > and nothing it does to the mixture changes it, it sets the
> > O2 sensor disconnected/dead error and goes to a default mixture setting.
> Do you know if this is the same default setting when the engine temp is
> below 170F?
Not usually. On the 5kCSQs, it uses a duty cycle of 50% if the
O2 sensor error is set. During warmup it uses values up 80%
(I think). Higher values indicate richer mixture.
> Iíve noted that engine performance is better when the coolant temp is
> not quite up to the normal operating point. Not a good practice, but
> sometimes you have to scoot on the freeway on ramps in the morning to
> keep from being creamed from behind. The performance difference is quite
Possible. You probably have cooler more dense air as well which helps.
Once the WOT switch engages, the ECU uses another set of fixed duty
cycle values. I'm not sure which would take priority during warmup
though - the WOT values or the warmup values.