@Meathead16 thanks! Yeah I cry when I realize the Chassis & drivetrain on these GMT800s is KILLER awesome but the rest of the truck is a heaping pile of pure crap. It's been an uphill battle keeping from disentigrating since I bought it. However, that said, I bought mine in Rio Rico by AZ Mexico Border and guy literally parked it next to the SUN outside.
My issue is similar, I occasionally smell gas on start-up. My guess has been it's because I'm in open loop with PCM fuel controller. However, sometimes it's REALLY strong almost like I poured a tinge of gas on the ground. I don't ever smell it while driving though thank god. Sorry to hear that.
What year is your truck? Sad thing is I have a 2001 and they seem to have changed the evap canister design shortly after 2001. Long story short, the short run / evap design on my truck cost a bloody fortune to replace versus like $50 for the newer design
So I really do want to fix the canister. I don't think they really go bad unless you get them wet or completely soaked with fuel.
What I've done so far:
- Evap lines, need rebuilt, all Quick Connects are busted up.
- Fuel filler - it's good, no issues. Simple ring clamp connection, easy enough to adjust / fix if necessary.
- Fuel Pump & Tank - I replaced entire fuel sending unit. When tank was down I cleaned and inspected it. Tank is a quality piece and still like new, along with all connections on top. I've since doubly inspected, by feeling top of tank and everything is in perfect order on top of tank.
- Fuel injectors - Completely took apart rail, cleaned and visual inspection (I have a built up 6.0L) I swapped with the E85 injectors I don't recall what that engine is called. One thing I never did was check fuel pressure / the regulator. I had ordered a fuel pressure gauge and company sent me the wrong thing long story... but I definately need to check fuel pressure. Otherwise, I've tuned the fuel for new build and it's spot on w/ Wideband O2 and narrowband.
- Fuel regulator - the vacuum line was broken when I did my injectors. I need to do the smell test! That's a great idea. I have since installed a new vacuum line.
- Evap canister - damn thing. I could scream, yeah the nipple (male fitting) for tank line broke clean off. I glued it back but no luck. I need to order a male fitting of that size, then cut them at a point where there's some extra before the lip for QC lock... then take a slightly larger diameter hose of some kind and just glue the two together with JB weld. I may actually reinforce all the fittings on the evap like that. Then get some quality quick disconnects. The ones from the factory, and upon further inspection, doorman is same style, are complete CRAP. If you are lucky you can get screwdriver to unlock them (QC tool doesn't fit). And the finger release design doesn't work. The lines themselves are great quality otherwise.
