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Old 03-17-2011, 10:12 AM   #29
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Originally Posted by ROBERTSUNRUS View Post
Changing the air filter on a gas engine can destroy the Mass Air Flow sensor
If you spray too much oil on the filter, it can coat the sensor and that's not good. Follow instructions closely and keep saying to yourself, "more is not better."

4Runner has had K&N filter for 60,000 miles and Tundra just about as long and no change in performance, so I believe the sensor is operating as it should.

Gene
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Old 03-17-2011, 09:49 PM   #30
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Originally Posted by CrawfordGene View Post
If you spray too much oil on the filter, it can coat the sensor and that's not good. Follow instructions closely and keep saying to yourself, "more is not better."

4Runner has had K&N filter for 60,000 miles and Tundra just about as long and no change in performance, so I believe the sensor is operating as it should.

Gene
Hi, this is exactly right; Too much oil or improper cleaning, isn't good.
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Old 03-22-2011, 03:17 PM   #31
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$3k won't even pay for a set of injectors, much less a transmission rebuild. There is no free lunch with "tuners" and the aftermarket suppliers will not disclose what is changed, and where, thus one is left to guess. These integrity of these components is affected by tuners.

300HP and 500TQ is MORE than adequate to tow any Airstream ever built or contemplated. The 4500 and 5500 series trucks that use the medium duty Cummins are de-rated by comparison to the hyped motors (and easily-manipulated buyers) in the light duty trucks which are our interest here. No one is complaining about "performance" among the commercial owners (as their interest is in long-life, predictable costs) and adding aftermarket magic boxes just makes service more problematic as time goes on. They don't, in other words, fit the decision tree of problem diagnosis. A wild card, a joker in the deck.

FE is better accomplished by improved driving skill, trip planning, elimination of idle time, etc. Truck spec is the greatest predictor of mpg (for a given driver) followed by terrain/climate. Once truck spec is set then bandaids that may reduce reliability/longevity are not the way to go to try and re-coup a small increase in mpg.

At $5/gl and an average 15-mpg, $3k doesn't represent even 9000-miles of driving. Spread over 5-years it is 1,800-miles year, or, 35-miles/week.

Continue your analysis. Sending money to strangers for a magic box is the answer to a question improperly asked.

.
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Old 05-22-2011, 11:06 PM   #32
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Brian,

If enhanced power is what you want, a programmer from Edge, Bullydog, Banks, etc. will most certainly deliver it for you. BUT, if the powertrain warranty on your new GM truck is important to you, do not add a programmer.

If I take my LMM or newer Duramax to the dealer with ANY engine, transmission or drivetrain warranty claim, the mechanic must first check for evidence of an aftermarket programmer. BEFORE any work is done.

First. The mechanic hooks the Engine Control Module (ECM) up the Tech 2 and takes a digital snapshot of the last 10 Calibration Verification Numbers (CVNs) or programming events.

Second. The mechanic goes to the Transmission Control Module (TCM) and takes a digital snapshot of the Max Transmission Calc Engine Torque. (Max torque for an LMM is 660 ft/lbs)

Third. These two digital snapshots are sent to GM for verification.

If a non-GM calibration is found and verified by GM, the remaining powertrain warranty will be canceled.

Can a programmer improve fuel economy by 2 or 3 mpg? Maybe, but I seriously doubt it. I agree with the earlier poster. If merely adjusting the ECM's program could improve fuel economy that much, Ford, Chrysler and GM would have done it long ago.

John
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Old 05-23-2011, 12:48 AM   #33
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~~~

Can a programmer improve fuel economy by 2 or 3 mpg? Maybe, but I seriously doubt it. I agree with the earlier poster. If merely adjusting the ECM's program could improve fuel economy that much, Ford, Chrysler and GM would have done it long ago.

John
I don't mean to be argumentative, just to add a little context. I'd say if merely adjusting the ECM's program could improve the fuel economy that much with no other undesirable effects the manufacturers would be all over it. You can enhance performance and/or mileage, but at the expense of longevity, emissions and/or drivability.
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Old 05-23-2011, 09:42 AM   #34
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Are you sure about the diesel. I pull with a diesel and like it. But I would not buy another diesel to replace it. The worry about the expensive engine failing, the extra cost for the diesel engine, the 50 cent premium for fuel, the high maintence costs, the stiff ride, and the convience of having a fuel injector replaced have dimmed the glow of the diesel for me.
I do not run a programmer.
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Old 05-23-2011, 10:49 AM   #35
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The cost of a diesel has to be put in perspective. My fuel costs, my maintenance costs, my cost of repairs have all been lower than with any comparable gasser when examined on a cents-per-mile basis. Not projected, but actual . . the projected looks even better.

It does matter what brand you buy, and model year.

For those replacing a vehicle every 5-7 years, anything will work well for this trailer type.

.
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