Recent content by hagar

  1. H

    Physical ethanol sensor speed?

    If it helps, I have tuned over 4 thousand vehicles, and i still have no idea how the virtual sensors work. I have seen 40 plus trucks now that had the virtual sensor mess up and run crazy rich. I just turn the system off, then set the stoich to 14.2 for 87 octane, and 14.7 with no ethanol fuels...
  2. H

    Physical ethanol sensor speed?

    I personally think PPV nailed it with the blend time. I run a pump out splitter on e85 cars that switch between gas and e85. When i pump the gas out to nothing, then fill the tank with e85, it registers the full ratio of the e85 as soon as I turn the key back on, no delay. Haven't tried doing it...
  3. H

    Can’t shut wipers off!

    Without a doubt is. I had one customer that as soon as you hooked up the battery with no key in, the wipers would go on and the horn would stay on. They do some weird stuff! New module and a flash, and it was good as new.
  4. H

    Can’t shut wipers off!

    Good info above, i have also seen faulty body control module cause things like wipers and horn to stay on random.
  5. H

    2012 Suburban Misfire #5 drama

    Did you try swapping the number 5 injector to another hole? Wonder if the injector is over fueling based on those fuel trims?
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    2012 Suburban Misfire #5 drama

    That is a great suggestion. I looked at a buddies 6 liter with high miles a few years back that was misfiring, though his was on a few cylinders, and couldn't find anything wrong with it. Did a crank re learn and it smoothed it right out and ran great until it got stolen a few months ago. In...
  7. H

    Burning oil

    Replace your drivers side valve cover with the dorman 264-969 as a start for the oil burning issue. Change your plugs and cylinder 5 will most likely be getting oil build up on it from the oil burning problem causing the misfire, then run penzoil 5w30 synthetic high mileage formula with a half...
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    5.3L dies at idle after running at operating temperature in cold weather

    Like said above, most likely a vacuum leak, check the pcv hose at the rear drivers side of the valve cover, it is common to crack and leak back there and is hard to see if you don't look for it. It makes sense it's a leak since it gets worse when it's cold out, more air gets in when it's colder...
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    A heads up for y'all.

    I have never seen a coolant temp corelation code before, only open circuit codes. I have however seen coolant temp sensors report improperly and not throw a code. I manipulate the air intake temp sensor in some applications so it shows vastly different than it should, and it never trips a code...
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    A heads up for y'all.

    The problem with engine modules is they don't know there is a problem often. For example, if you try to start a vehicle with a coolant temp sensor shorted to -40, the engine will never figure out it's a problem, and will add insane fuel and not run. We like to think they are much smarter than...
  11. H

    A heads up for y'all.

    A very cool example of the problem, thank you for sharing. It's important.
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    A heads up for y'all.

    I personally set the tranny tunes up so they don't go below a certain shift torque factor setting. There is a lot of room in the part throttle shifting range to make things more aggressive, without making the shifts annoying. The benefit is not only better shift feel, but tranny longevity by...
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    A heads up for y'all.

    It's true. If you for example went into your maf transfer function and added 20 percent to the calibration, thus telling the engine it is getting more air flow, your truck would run higher in the load and timing tables. If you pulled fuel out of the maf calibration, the truck would run more...
  14. H

    A heads up for y'all.

    No such thing as too often, just gets worse and worse over time. More often would not be a bad idea.
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    A heads up for y'all.

    Yes, in your case since you are active with it, watch for your fuel trims starting to drift positive.
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