Finally, some good new for me...

"BlazinAce - Doctor of Internal Combustion" (pbs) 12/31/2013 at 09:55 • Filed to: Tipo

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Turns out my car's RPM drops weren't caused by a faulty idle control valve and stepper motor after all. We pulled those off this morning and they were perfect, what wasn't perfect was the carbon deposited all along the intake and air flow sensors, that's what was causing the problems. What really bothers me about it, though, is that those deposits are caused by shitty and/or adultered fuels, that is, the only kinds of fuels sold in Brazil, and THAT's precisely why I hate this country so much.

. . > BlazinAce - Doctor of Internal Combustion 12/31/2013 at 10:51

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If your fuel quality is so crappy how do Common Rail diesels survive in Brazil? They're notorious for being incredibly sensitive to fuel quality, as in you can kill your injectors and/or pump with one tank of sub-par diesel oil.

brianbrannon > . . 12/31/2013 at 11:20

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I think the op means dirty air. Fuel doesn't flow in the intake or air flow sensors

. . > brianbrannon 12/31/2013 at 11:21

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But exhaust gasses do if you have an EGR valve.

BlazinAce - Doctor of Internal Combustion > . . 12/31/2013 at 11:28

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This, it's the byproducts of a dirty combustion that create deposits.

. . > BlazinAce - Doctor of Internal Combustion 12/31/2013 at 11:35

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You can drop by Poland. There's a lot of shittiness around but at least our fuel is fine. ;)

BlazinAce - Doctor of Internal Combustion > . . 12/31/2013 at 11:39

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They don't... The time between overhauls of a diesel engine in Brazil is ridiculous, and that's considering diesel fuels are subsidized by the government for commercial applications.

BlazinAce - Doctor of Internal Combustion > . . 12/31/2013 at 13:00

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It doesn't get much worse than ours, haha... Brazilian gas already starts out with an unusually high sulfur content, then they add 20% (now 25%) of ethanol, and finally each gas stations cuts the "pure" fuel with solvents, water and other assorted sewage of their choice... For every liter of fuel we buy, I'd say about half is actual gas, the rest should not be inside an engine.

. . > BlazinAce - Doctor of Internal Combustion 12/31/2013 at 13:13

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Over here petrol stations are very closely scrutinised. The fuel is transported in sealed tankers, poured straight into tanks in preset amounts, and after that the tanks are sealed until the next top up. The measuring equipment installed in tanks will detect even as little as 100g of added weight (so the petrol station can't cut it with anything), and even small tanks will have a 400-600l layer of fuel that can't be pumped out sitting on the bottom, so that's where all the muck will end up.

BlazinAce - Doctor of Internal Combustion > . . 12/31/2013 at 13:19

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The problem down here isn't exactly the lack of rules and regulations, but how easily they can be circumvented with a wad of cash...

brianbrannon > BlazinAce - Doctor of Internal Combustion 01/01/2014 at 14:38

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EGR enters right before the Intake valves so it won't clog affect a mass airflow either.