SBAtdijetta said:
What about stepping up your timing slightly to compensate for the EGR turned off?
I didn't keep my EGR defeated for long. I noted a 2mpg loss, and no real change in smoke, so I ditched it after 3 tanks.
A few years later, when Ollie did my timing belt, he set my mechanical timing at the top end of the graph, which did help it start a little faster (Although I never had any real issue with starting)
I started driving more for economy as well, and my economy shot up from the low 40's to the high 40's.
Recently (and coinsidentally, right at the switchover to winter fuel) I made a few IQ and Adaptation Timing changes that were partially for economy, and partially to try to minimize the Scangauge errors between my daily commute and roadtrips.
I raised the IQ to around 5.6, which I believe makes the most difference in soot, as throttle tip-in is much, much more gentle, and I don't ever spike over 17psi. It also made the scan gauge much more stable over different types of driving. My adjustment has been rock solid within 0.1% the last 3 tanks, whereas it had been jumping all over the place before that.
I also set the adaptation timing to add 2.5 degrees more advance. The car is stock, so I'm likely adding less stress than a chiptune does.
Whether it helped with power, I don't know, or really care, since I really like the result. Typically, I'll lose 4-5 mpg over the winter due to both temperature and winter fuel. This year, (see my fuely) I've lost nothing, and have maintained roughly 51mpg, even through the recent spell of temperatures in the teens.
I'm looking forward to seeing what happens as spring catches hold, and the Kerosene gets out of the fuel.