Question For All Diablosport Predator Peeps

[nootron69]

Took my truck into dealer for inspection and oil change today. Many counties in Pennsylvania also have emissions testing in conjunction with the annual inspection, mine being no exception. Problem is, I FAILED emissions! Have a 5.3 Sierra, K&N filter, and Predator programmer. Anticipating going to dealer, I put the stock tune in the day before. Question is, when reflashing, does the computer need X amount of miles traveled to reset, calibrate and do all diagnostics? I am thinking that I failed emissions due to the fact I only put about 30 miles on the truck since returning to stock tune. Does that make sense? Thanks

[kuhl_530]

That does make some sence. Just recently the county I live in got rid of the vacuum type emissions test (where they stick the tube on your tailpipe) and started just using diagnostic readers to save money, and if you clear any engine codes, you have to put x ammount of miles on before you can test it. Otherwise there is insufficient data on the computer for them to read it. Here, they just tell you to drive around for a while and come back.

[06MonteSS]

yeah, after an ecm flash, the learned items, such as the fuel trims and all of the emissions readiness tests - all get reset... so you need to drive for a few days, or even a week, to complete a series of "drive cycles" so that the ECM completes all of its emissions readiness tests so that they show completed.

 

otherwise, you will not pass...

[nootron69]

yeah, after an ecm flash, the learned items, such as the fuel trims and all of the emissions readiness tests - all get reset... so you need to drive for a few days, or even a week, to complete a series of "drive cycles" so that the ECM completes all of its emissions readiness tests so that they show completed.

 

otherwise, you will not pass...

 

I thought so, only made sense. Had my first experience with learned emissions test when my 01 Dodge had a check eng light come on for a prob with the tranny (imagine that). Reset the code, drove around and never got lucky enough to drive enough cycles where it would pass emissions or not have the light come back on. Had to rebuild it. In PA, can't pass emissions with a check eng light on, despite the fact it is linked to transmission! I go back in Friday, 5 days with a fair amount of miles put on.