slosvo

passed the test today.... I did see that they clamp off the hose under the hood before the canister.. so that explains how the canister vents aren't in the play.. but it does explain how the rollover vales have that second vent hose.. Its a california truck so maybe it has to do with ca. emissions at the time.. another thing i was worried about is that the canister purge solenoid leaks.. when you apply vacuum to it on the manifold side it won't hold.. so the canister is always being vented.. but once again with them pinching off the line its basically not tested..

anyway hop this helps anyone that runs into this or these problems.. now to fix all these oil leaks...

midlife fifty fan

the line that the inspectors pinched is the one i connected my propane gas grill regulator to when i was troubleshooting mine.....when i put the propane to it..i could just soap all the offending connections with leak detection solutionand....voila!..

Chuck Harris

Long time lurker, first post.

Lot of good information in this thread. I appreciate the cooperative attitudes here.

I'm gonna inspect under the hood first, if I can't find anything there, I'll pull the bed off.

Andrew315

Nevermind.

Warlockk

I know its an unpopular opinion, but I just want to point out this is exactly the reason for these required tests. A simple problem and a simple fix. It's a system designed only to keep harmful vapors under control. It doesn't hurt performance, and its cheap parts but if its not tested, we don't know its not working. Anyway happy to see everyone is getting this problem fixed with little trouble. Another diagnostic trick is to run shop air at low pressure and look for the leak. Check with a bottle of soapy water. You can run air into the line like suggested for the propane trick or drill out an old gas cap and epoxy in an air fitting just like the emissions shop uses. Just keep the pressure low!

midlife fifty fan

i just pulled off one of the hoses at the cannister under the hood down below the battery and hooked it to my gas grill regulator....(low pressure of course) and just sniffed till i got close...then i used soapy water solution to pinpoint leak...it was a tiny rubber connector like a vacuum line by the gas tank

Warlockk

Any of those methods will work. Be careful however remember you are filling the air with fuel vapors. No sparks, pilot lights, air compressor switching on with a spark , etc. Do the job outside.

Chuck Harris

I checked under the hood, everything looked ok. I'm going to drill a hole in a spare gas cap and use soap water and air pressure around the charcoal box. I'm trying to avoid pulling the bed. I have a heavy toolbox and no access to a lift.