Fuel Evaporator Canister - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Ackattack · 07-31-2006, 02:33 PM

Does anyone know the effects of not having a fuel evaporator canister on their truck? Does it cut down on your fuel mileage.

I haven't gone out to investigate it yet, but I posted a thread on another forum and someone mentioned it. Basically (and if I remember right) when I took mine off, it is leaving the gas tank venting to atmosphere, and therefore wasting any gas that evaporates while in the gas tank. Also, I'm running fuel injection, so any gas that is pumped out of the tank and isn't used by the engine gets pumped back to the tank and free falls back into the tank, which I'm sure adds to the fuel vaporizing.

Anyone with experience with this.

I'm working on increasing my fuel mileage and I'm thinking this may be one thing I've been overlooking WAY too long.

Thanks

neonlarry · 07-31-2006, 03:37 PM

Its more of an enviormental issue the a fuel mileage issue. Yes you will get an increase in fuel mileage but it would be on the order of hundrederths or thousandeths of a mile per gal.

da-burb · 07-31-2006, 11:33 PM

I don't see how it would cause any change in fuel mileage. It's only job is to collect fuel vapors that come from your fuel system that would have passed into the atmosphere. Then using vacuum it pulls those vapors out of the charcoal and burns them while driving. Now the rest of the emissions system could cause some loss of MPG's.

Ackattack · 08-01-2006, 12:05 AM

Don't know....maybe in the 3rd gen camaros that I got the L98 out of, they use it differently where if you take it out it effects it more....dunno

07-31-2006, 02:33 PM	#1
Ackattack Senior Member Join Date: Aug 2002 Location: Valley Center KS Posts: 3,524	Fuel Evaporator Canister Does anyone know the effects of not having a fuel evaporator canister on their truck? Does it cut down on your fuel mileage. I haven't gone out to investigate it yet, but I posted a thread on another forum and someone mentioned it. Basically (and if I remember right) when I took mine off, it is leaving the gas tank venting to atmosphere, and therefore wasting any gas that evaporates while in the gas tank. Also, I'm running fuel injection, so any gas that is pumped out of the tank and isn't used by the engine gets pumped back to the tank and free falls back into the tank, which I'm sure adds to the fuel vaporizing. Anyone with experience with this. I'm working on increasing my fuel mileage and I'm thinking this may be one thing I've been overlooking WAY too long. Thanks __________________ Project Bruiser: 68 Pro-Touring C-10 5.3L / 4L60E Project Ironhide: 97 GMC Crew Cab 4x4 Cummins SOLD: '69 GMC 1/2T SWB TBI'd: Project No Buck Assembly Manual Index Sign up Thread!!! Factory Service Manual Index

07-31-2006, 03:37 PM	#2
neonlarry Registered User Join Date: Feb 2002 Location: Vacaville, CA Posts: 2,745	Re: Fuel Evaporator Canister Its more of an enviormental issue the a fuel mileage issue. Yes you will get an increase in fuel mileage but it would be on the order of hundrederths or thousandeths of a mile per gal. __________________ 70 C/10 Light Red 350/TH350, HEI, Duals w/40 series Flows, 91 seat, LED taillights 99 Pontiac S/C GTP, SLP Ram Air hood, GMPP Konis & springs 95 Neon ACR, MP PCM, AFX UDP, 3.0 CAI

07-31-2006, 11:33 PM	#3
da-burb "Ochre Ogre" Join Date: Apr 2000 Location: Springfield, MN Posts: 3,558	Re: Fuel Evaporator Canister I don't see how it would cause any change in fuel mileage. It's only job is to collect fuel vapors that come from your fuel system that would have passed into the atmosphere. Then using vacuum it pulls those vapors out of the charcoal and burns them while driving. Now the rest of the emissions system could cause some loss of MPG's. __________________ Bowtie Truck Stop Inc. Mid-West GM Truck Restoration Parts Supplier Your Key Parts, Auto Metal Direct, Dynacorn, and Goodmark dealer. like us @ www.facebook.com/BowtieTruckStop 1971 C-10 Suburban (Ochre) 1971 K-10 Suburban (Ochre) 1972 C-10 Suburban (Ochre) 1972 K-20 Suburban (Yellow- that just aint right!) Springfield, Minnesota 56087

08-01-2006, 12:05 AM	#4
Ackattack Senior Member Join Date: Aug 2002 Location: Valley Center KS Posts: 3,524	Re: Fuel Evaporator Canister Don't know....maybe in the 3rd gen camaros that I got the L98 out of, they use it differently where if you take it out it effects it more....dunno __________________ Project Bruiser: 68 Pro-Touring C-10 5.3L / 4L60E Project Ironhide: 97 GMC Crew Cab 4x4 Cummins SOLD: '69 GMC 1/2T SWB TBI'd: Project No Buck Assembly Manual Index Sign up Thread!!! Factory Service Manual Index



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