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Originally Posted by ps2fixer
BLM/LTFT - Has bank 5-8, but is called LF1 - LF4, I tried bank 5 and it never populates
KR - I see no where to monitor this on their page or default gauges
EGR duty cycle - Same as KR, with 230k miles, the EGR is probably partly blocked off.
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I would call the tech guy at Scangauge about getting the parameters right for reading those values on your car. He has been very helpful to me in the past.
I have seen EGR passages clog with only 50,xxx miles, so yeah that's a good possibility.
Quote:
Originally Posted by ps2fixer
If the EGR is messing it, it could actually increase FE? I always thought it was the opposite, big time if I'm getting spark knock.
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When dealing with tuning parameters like that there is never any hard rule where you can say x-change has x-effect, because it always depends on the specific tuning conditions you are starting from, and the particulars of how the engine is being loaded at the time you are examining.
It does often happen that MPG goes up when the EGR flow is blocked.
The MPG going up when spark knock triggers knock retard is not as common, but just as possible. It all depends on what the engine needs at that particular time. With certain loading conditions, less spark advance requires significantly less fuel in order to maintain stoich operation.
Quote:
Originally Posted by ps2fixer
As for engine rattles, there are some and different RPMs. At low speed just starting off really easy, the engine sounds almost like a bad wheel bearing (last owner said it needed one, all are good).
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Maybe one of the belt-driven accessories is going bad. It's usually a quick and easy test to remove the belt and start up the engine for a few seconds as a test.
Quote:
Originally Posted by ps2fixer
At some point in time, I plan to hit the car with seafoam to clear out the carbon, and check the EGR ports, idle control valve, etc. I would just hate to loose FE by "fixing" the engine lol.
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Seafoaming doesn't always work out for the best, especially on very high mileage engines. If you do it, be sure to change your engine oil not long after the cleaning is done.
EGR passages can usually be easily cleaned out with some Acetone, Mineral Spirits, or a combination of both, and some compressed air at around 100 PSI.
Quote:
Originally Posted by ps2fixer
Back to more info on this "mode", even in warmer weather (60s-70s now) it is almost exactly the same setup except the car can move easier though the wind I guess. Instead of fighting about 6.6-6.8 MAP values to stay in the mode (under 7), I was going 45mph with as low as 5.8-6.2 most of the flat land travel. Instant mpg was reading between 60-65mpg, a few spikes to 70mpg but I was probably slowing down ever so slightly. At first I kepted hitting 50mph with my normal MAP readings, I was going WTF for a few miles lol. Trip average hit a new high as well, 49.9 and about 6 miles shorter (stopped at gas station), so it could have been at least 50.2 by the time I got home.This is from the same tank of gas I hit my last 2 high figures, 45.3 and 47 and my last aero mods. Can't wait for summer gas (if it isn't here yet).
With out this "mode" I rarely hit over 40mpg average on a trip.
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Yeah our Focus gains around 10 MPG during warm weather, and I've traced most of this gain (ours) to warmer engine oil. I'm going to address this issue more before next winter comes. There are multiple factors involved with fuel usage vs outside temp though.
As for the precise adjustment of the throttle position it seems you could really use an increase in throttle resolution to make it easier to get your high mileage. The range of TPS is extremely narrow between the point of acceleration and deceleration. Take a look at your throttle cable interface with the throttle lever on your throttle-body and you may be able to do a small modification to make it easier to drive in this narrow range of operation. Increasing throttle resolution means that it requires more gas pedal movement to translate into the same movement at the throttle.
On our Focus there is a cam-shaped throttle cable guide on the throttle lever, and it was easy to increase resolution by changing the inner shape of the cam-groove with a piece of aluminum foil as a quick mod. Be careful not to bind the cable or it could break, - unlikely if you don't go WOT, and also be careful that the cable will not come out of the groove during operation.
http://i702.photobucket.com/albums/w...cablephoto.jpg
