FirebirdGT

Since the vapor canister has charcoal media inside - how often should the canister be replaced?
.

GaryDoug

The 93 manual shows only 2 hoses/pipes. But this Nalley GM diagram shows 3 hoses/pipes. One seems to be just a vent line going to a place behind the gas tank near the tank vent valve. The diagram covers all F-cars including Firebird

FUEL SUPPLY SYSTEM. Fits: 1993 Chevrolet Camaro | Nalley Buick GMC Brunswick

blac94Z

its the pressure control valve the one iwas talking about do i need to change that also
and how do i remove the canister from the holder ?

Injuneer

It's conceivable that mine got lost when the fuel tank was pulled out to install the sump for the second pump. Point is, the center connector does not connect to anything on the other end.

The band around the canister opens up:

blac94Z

ok great i seen that the middle conncetor didnt connect to anything and now the valve next to the canister should i replace it or should i just replace the hoses and is there a hose clamp needed for the 1hose that runs to the valve

Injuneer

In theory, the activated carbon adsorbs the HC molecules, holding them on surface area of the carbon. When engine vacuum is applied, fresh air passes through the carbon bed, pulling the HC off the carbon and into the airstream to the intake manifold.

I have never seen a recommended replacement time or mileage interval. I doubt anyone does it unless there is evidence of the carbon breaking down and entering the line and purge solenoid, or if the canister becomes saturated with fuel.

I have never seen anyone replace that valve. You could test it - there is a test procedure on page 6E3-C3-2 of the 94 factory manual (Volume 2 of 2).

blac94Z

ok now the factory hand book are you going by haynes or a different book bc im going to be buying everything in the morning so i wanna make sure and im going to change the purge selinoid and hoses

Injuneer

GM publishes a "factory" manual for the dealer mechanics (it's actually published by Helm, and anyone can buy one for well over $100). It contains far more vehicle specific information than a Haynes or a Chiltons. I can give you a link to a site with a free download, courtesy of GaryDoug.

blac94Z

that would be great bc this is my first f-body and I'm not to familiar with some things like this opti spark ignition (it's kinda weird) ... now to the canister the bracket it just unclamps or do I have to remove the the bracket also ?

Injuneer

LINK: 4TH GEN SERVICE MANUALS; 82-02 PARTS DIAG; 99-02 WIRING DIAG - Firebird Nation

See the "tab" on the clamp at the bottom of the photo.... you pull outward on the tab, releasing the teeth that are visible up against the canister.

blac94Z

**UPDATE**
so i change basically 75% of my fuel system now including all new hoses,valve,solenoid,canister now i started my car up and it was running good... in park but when i thre her in reverse she started to cutt off i had to drivwe it home at redlights in Neutral i know i need to change my fuel filter and sending unit and that will be everything excluding injectors and rail, so what could be going on ?

blac94Z

too add i have a video i going to be uploading after i get off work ,
nothing but charcoal and liquid gas coming out of my canister