charcoal canister

[msaintg]

hey guys, I need some advice. Do I need to keep this charcoal canister when I do my conversion? I am keeping all of the other emissions stuff (like the cat and oxigen sensors) even though I don't need them to register the truck as a 1947, but I want to keep that stuff so that the ECU will work properly to give me the best performance and fuel economy. And if I don't need it, what do I do with the two metal lines coming off of the engine? (this is on a 1996 S10. 4.3L/auto tranny setup)

thanks

[1project2many]

If you don't have any of the emissions equipment connected then the OBDII computer will complain. This includes a fuel tank designed to work with the purge and vapor control system. I would recommend sending your computer to someone to have it reprogrammed so the codes can be disabled. The rear O2 sensors and catalytic converter performance codes, the EVAP (fuel tank vapor control) codes, purge codes (the charcoal canister), and even torque management can all be disabled fairly easily. While I love seeing older vehicles made cleaner and more powerful at the same time, federally mandated systems to monitor emissions only add complexity and expense to a vehicle that's not subject to these requirements.

[msaintg]

wow, thanks, you know waaaaaay more about this stuff than I could hope for. So what your saying is.... I need to keep it if I don't get the computer reprogrammed. I don't know why, but this was the only piece of emmissions I was trying to get rid off.

[mknittle]

That's why i am running a 1970 engine!

[mr48chev]

If you are keeping the rest of the equipment on the engine I'd run the canister. It acts as a filter for the vents on the fuel system on the engine and the tank and won't rob power or cause other issues. I've thought about putting one on my 48 and running a vent line to the tank just because I get tired of smelling gas fumes around the truck when it's parked and the heat from the sun builds pressure up in the tank that now vents through the vented cap.

[buggy5872]

I agree with 1project2many. Get your computer reprogremmed and ditch the rear o2 and cats. I would keep the canister though. Like mr48chev said, it will keep your truck fume free. On my 57 LCF, I used everything but the cats and rear o2 sensors from the 2003 chassis and running gear under it. Computer is happy and I can plug it into a reader and trouble shoot it.

[BlueJeep]

I kept the canister on mine for the aforementioned reasons. It doesn't take up any space I'd use for anything else, and it was already on the s10 frame.

[solidaxel]

Originally Posted by mr48chev

If you are keeping the rest of the equipment on the engine I'd run the canister. It acts as a filter for the vents on the fuel system on the engine and the tank and won't rob power or cause other issues. I've thought about putting one on my 48 and running a vent line to the tank just because I get tired of smelling gas fumes around the truck when it's parked and the heat from the sun builds pressure up in the tank that now vents through the vented cap.

If you seal the tank- gas cap, how do you seal the carb fuel bowl from venting in the 118* garage when the trruck sits for a week

[buggy5872]

He has fuel injection so he has no fuel bowl.

[msaintg]

Originally Posted by BlueJeep

I kept the canister on mine for the aforementioned reasons. It doesn't take up any space I'd use for anything else, and it was already on the s10 frame.

this wouldn't be an issue if mine was attached to the frame before, but it was attached to the sheetmetal on the Blazer. I can relocate it to the frame, but relocating those two steel lines running all the way from the engine to it was going to be more trouble than I wanted to go through (if I didn't need to). So I guess I will just have to relocate it to rear frame cross support.