Quote:
Originally Posted by BigV
I am really not being shitty to him, I'd love to solve this rough idling problem glatt's car has. I don't know everything there is about cars, and I love to learn new stuff. But unless tw has some magic trick he's still hiding, I don't see how his explanations achieve the desired result.
|
That is the point. You do not understand the relevance. Do not understand how that information results in solutions.
Solve problems in two steps. First collect facts. Much later solve the problem. Some of that stuff posted fix a problem without first determining what is wrong is called shotgunning. Could even exponentially complicate his problem. Those was some of the most random and irrelevant wild speculation I have read in a long time. Any mechanic that did that would have been quickly unemployed. You should have been mocked for those consecutive and irrelevant recommendations. But then making all those mistakes is how we eventually learn. I just ignored them suspecting that glatt also would probably be doing same.
Embarrassing was a claim that two cylinders fire simultaneously. And a few other bogus claims. Each cylinder fires separately. You should have known that since it was taught even in primary school science. No reason to mention that until now that you decided to entertain your ego. I was not going to say anything then. But now you need to learn some humility. Big time.
We have a list of suspects from the shop manual. And a few others not on that list. Facts such as diagnostic codes, information collected by a portable computer from the dealer, and gasoline mileage all provide relevant information. Facts to significantly reduce a list of suspects to but a few. Even the fact that roughness did not correspond to an engine code was useful information.
Also important are conditions that cause or co-exist when roughness does and does not exist. Whereas tire pressure likely is not relevant, it is still a change that should known. Never short the help of a change only because you consider it random or irrelevant.
Use the oxygen sensor as an example. Some assumed an oxygen sensor could cause rough idle. Why? An oxygen sensor is mostly about operation at high speed; not at idle. An oxygen sensor (in most designs) has no influence on how idle works. Why then did someone suspect an oxygen sensor? An example of implementing a solution long before a defect was even defined.
Gasoline mileage goes a long way to exonerating many suspects. But not everyone would understand that for a same reason why some might automatically suspect an oxygen sensor.
Another example was recommended. Full to the floorboard acceleration repeated after each engine restart. So that diagnostic codes might report some other defects. It should have been done especially when one has no idea what that will discover. What was to you random was actually targeting specific suspects.
You have no idea why gasoline mileage numbers were important. Numbers more useful had those numbers been taken when the car was running better. Numbers that would have even said more if taken for a tank of Liberty and another tank of Shell.
Moving on. Another explained what high octane gas is. It is not cleaner or better. High octane does not burn out crud. It is only different. Some brands include additives that make other differences.
For example, Mobil once contained high detergent additives. Therefore gas was cleaner? No deposits? Nope. High detergent levels in Mobil caused increased carbon deposits on valve stems.
Same applies to high octane. High octane can increase engine wear and failure on some parts. The word high does not mean better (except at the end of the day in a room with a towel covering that hole underneath the door).