DSM gets 9mpg...

[Steeltwo]

Sorry man, you aren't going to see a 12 mpg difference in gas mileage. The mid 30's must have been on a short fill or your tires are a different size or something.

closed loop seems to be the culpurt to the change in gas mileage according to the keydriver guy.

i thought he accidently burned the chip to lean, but after he looked at the log, he said closed loop was causing the increase in mileage.

[JET]

closed loop seems to be the culpurt to the change in gas mileage according to the keydriver guy.

i thought he accidently burned the chip to lean, but after he looked at the log, he said closed loop was causing the increase in mileage.
I don't need a tech 101 lesson. For a DSM to go in closed loop it needs to be at a fairly constant speed, engine RPM and no drastic TPS changes. All DSM's should be running at closed loop on the highway, so there isn't anything special about yours. If you truely are getting mid 30's for gas mileage, you had better have an EGT. You are very lean. On a FWD it is doable because of the taller gearing, lighter weight, and less drivetrain loss.

[Steeltwo]

I don't need a tech 101 lesson. For a DSM to go in closed loop it needs to be at a fairly constant speed, engine RPM and no drastic TPS changes. All DSM's should be running at closed loop on the highway, so there isn't anything special about yours. If you truely are getting mid 30's for gas mileage, you had better have an EGT. You are very lean. On a FWD it is doable because of the taller gearing, lighter weight, and less drivetrain loss.
how was my post a tech lesson?

i know jack shit about these cars. I was just posting what the keydriver guy told me.

[Steeltwo]

and(now) i'll be getting a egt this spring

[Kracka]

and(now) i'll be getting a egt this spring

Get a good probe such as the GReddy or TRE, the Autometer probe is very slow to respond.

[CarPsyco84]

yeah, if you get off the hiway, and you've been nice to your car, and your exhaust manifold glows like a champ, that would be your first clue....

[turbo2086]

I get about 16 MPG city driving. I used to get a little, more even after the EGR block off, and emission removal. I been studying my data logger, and notice that I do not get any O2 readings until about 2-2500rpm. I even tried a new O2 sensor, and that hasn't changed. I'm guessing the voltage supply for the warmer has failed somewhere. Someone told me without O2 readings at idle, its maxing out my fuel trim :eek: So once I get a warmer day (40ish) I'm going to go around and try to figure it out. Cause its sucks to have to let your cars stay at idle for so long to warm up. :(