How much emmissions stuff can I delete? (Page 1/1) Filben MAR 02, 02:57 PM I am swapping my 2.8 for a 3.4 from a firebird. I wanted to know how much emissions stuff can be deleted without messing anything up. The spaghetti mess is just awful with 80s style emissions. I am keeping the catalytic convertor but do I really need this many vacuum lines going to the charcoal canister? 82-T/A [At Work] MAR 02, 04:12 PM quote Originally posted by Filben: I am swapping my 2.8 for a 3.4 from a firebird. I wanted to know how much emissions stuff can be deleted without messing anything up. The spaghetti mess is just awful with 80s style emissions. I am keeping the catalytic convertor but do I really need this many vacuum lines going to the charcoal canister? Well, it's kind of hard to answer. There's a few vacuum lines, and they go to a few things: - Cruise Control (if you have it) - MAP Sensor (which is not for emissions but engine operation) - Vacuum Solenoid (which is used for the EGR system I believe) - EGR - Fuel Pressure Regulator - Fuel Evaporative Emissions Canister I'd say the one that adds the most mess is the EGR system, which includes the vacuum solenoid. But that said, the ECM is programmed to expect it, and the fuel mapping expects EGR gasses. If you want to remove it, you'll have to get a new ECM prom burned. As for the fuel evaporative canister... it doesn't affect anything with respect to engine performance, and actually improves engine starts by sucking out the fuel vapors. It's not something you really want to remove (to be honest). The Fiero's V6 really isn't so bad. The Corvette of the same years had a SMOG pump with AIR Injection lines coming from the manifolds to the catalytic converter... ugh... be glad we don't have that on the V6. Spadesluck MAR 03, 06:17 AM The three lines going to the charcoal canister are all needed, but they can be rerouted. One line is to the fuel tank, one is a vacuum source before the throttle body, and the third is the vacuum after the throttle body. The can itself is designed to be hooked up this way. On motor swaps I move the can to the fender area where the air intake is at.