he was talking about the 96 or OBDII trucks, your fine.

 

I figured that haha

 

If I was a tree hugger why on earth would I drive an old truck? I'm sorry if it is inconvenient when I describe how exhaust systems actually work. Everyone wants free power. Running straight pipes only reduces power. There is a reason I spent time and money going to school. I promise you a vehicle with a well designed exhaust will always outperform the same engine with straight pipes. As far as the law goes do what you like I'm just letting people know. Not everyone drives around in the middle if nowhere like you. The laws are only going to get worse and if people keep proving tree huggers right by pulling off control devises to make engine run inefficiently and increase smog cuz it sounds cool, then they will pass more laws. Eventually they will come around and start impounding cars. FYI I am in a couple of enthusiast groups that just managed to stop one such law. It would have set up mobile inspections to ticket and impound vehicles with illegal systems. The group argued that it would cost too much and create too much traffic and that there were too few old vehicles to be concerned with. But the point is most politicians dont care about old cars or classics or off road. They figure we should just buy new cars. So the more tree huggers and new car manufactures can show that our old cars are creating the "global warming" the more " junker" and "smog" laws they will pass. Personally I think global warming is bs. However I do know what gasses come from the exhaust system and that they are deadly. They get sucked up into the cab of the truck and we breathe them. Think about that the next time you take your wife or child for a ride in the truck.

 

I've had folks on here to make similar comments to me as well when I mention keeping the emissions components connected.

For me, it's an issue of knowing that the truck is running properly and has no codes because everything is connected properly and also not breathing in those heavy gas fumes. My truck's exhaust produced "burn your eyes out" vapors until I redid the exhaust which included a new cat. On our trucks, the cat is especially important (in my opinion). It would suck to have to diagnose a problem, but there are default codes that will never go away. Its broken logic at its finest.

Another thing is that some people don't understand that some emissions components such as the EGR valve actually works to the owners advantage with keeping the combustion chamber cool, thus keeping the engine 87 friendly.

I understand where you are coming from....although I don't work on cars professionally anymore, I went to school for it as well and at this point, I state what I know and for those who flare up about it, I just chalk it up as the rebellious truck segment that feels that a real truck is best without smog equipment, a power robbing catless dual exhaust (instead of a torque building 3" single) and lots of codes and driveability issues.

Keep doing what you're doing, your commentary and advice is golden.

 

http://auto.howstuffworks.com/fuel-e...rculation2.htm

Just some basic info

 

Basic function of the post Cat O2 sensor is to maximize its efficiency. It has very little fuel trim functions while driving.

Newer vehicles today rely on post O2 sensors for air-fuel ratios.

 

Straight pipe just removing cats and muffler gets a bit more power. Straight pipe modified exhaust would lose power unless you drive at 4 to 5k rpms most of the time. Personally I hate the smell of efi with no cats . The whole smog police thing is stretching a bit, maybe in California but not in the real world. Those rules are mainly in place to keep repair facilities from removing emissions devices.

 

And suffocating the person in the car next to you in traffic. Smog equipment has a legitimate use.

Guessing you haven't lived in a big city where they have had smog warnings?

 

I don't live in a big city. I live in the country.

 

Even in the country you can smell it. Cold winter mornings and the air is still, idling the truck you can smell exhaust fumes all around you. Now imagine that smell x100 without smog equipment or cats, almost raw fuel smell and those vapors do harm.

I'm no tree hugger but I'd prefer to stay cancer free.