HELP!! B4 I loose my F%#@ing Mind (smog related)

[In2cruisers]

OK....after searching and hunting down the missing and inop parts to smog the 1980 Fj40 I purchased a few months ago....I cant get the sucker to pass the evap. test.

She passed the visual test, passed the reg. smog test with flying colors...but I keep failing the evaperative test ( Thanks Arnold...Ca). Have replaced all hoses from canister to tank and returning to pump. Replaced both sender and fuel draw gaskets.........WTF ???? Is there a vent somewhere in the system? or ??

For you non-Cali's what they do is clamp/seal the hose leaving the canister going to the tank, then remove the gas cap and replace with a suction device 1/2 lb of suction....if you bleed off any you fail............


HELP !!!!!!!!!!!!!!!!!!!!!!!!!!!!

 

[Isaacjohnstar]

Move to Montana haha sorry not helping

 

[FJ40Jim]

I've heard that the plastic fuel separator can crack and leak.
Never seen it personally, but it has to be either that or the tank itself has a pinhole in the top of it.
Seen that many times.

 

[high country cruiser]

I've been there....

O.k. so run through your options... if your bleeding off something is leaking.....lets start @ each connection and use a simple & cheap hand vacuum pump and also there are multple lines on the tank to the e-vap system. Are they all correct? Stay calm and think, Simple process of elimination..... What about the vent hose on the neck the tank has to pressure off somewhere............need more info...

 

[cruiserbrett]

check alot of things:

fuel tank for a rusty pinhole in the top, sender gasket, rubber hoses to vapor separator for cracks, metal hardlines for chafing or holes(common on pre 79 cruisers, dunno about later ones), charcoal canister for leaks, and the solenoid on the charcoal canister for functionality? any issues will cause it to fail.

also make sure they are clamping the correct hose, there are a few from the tank to the vapor separator. clamping one wont close the system.


how about putting about 1 psi pressure on the tank and search for the leak? duplicat the test but use low pressure

 

[In2cruisers]

O.k. so run through your options... if your bleeding off something is leaking.....lets start @ each connection and use a simple & cheap hand vacuum pump and also there are multple lines on the tank to the e-vap system. Are they all correct? Stay calm and think, Simple process of elimination..... What about the vent hose on the neck the tank has to pressure off somewhere............need more info...

OK...........More info you want....

I have replaced

1) all three hoses that come off charcoal can
2) the connecting hose just before rt wheel well
3) all three hoses that run from tank to e-vap
4) all four hoses that connect to e-vap canister
5) large hose- over flow return
6) both sender and draw tank seals
7) both hoses leaving draw to hard line
8) both hoses from hard to hard near transfer case
9) both hoses leaving hard line (engine comp.) to fuel pump