Quote:
Originally Posted by NorCalAnthony
Thanks for posting all that info, I'm sure it'll help someone thinking about doing the same thing in the future. How did you guys handle the fuel tank pressure sensor? I had an '89 Blazer and a wrecked '01 Yukon that I was planning on swapping drivetrains but that was one of the hang ups with the emissions part of the swap that turned me off that idea. I wound up selling the '89 Blazer and bought a '84 diesel Blazer (smog exempt) just to avoid all of those headaches lol.
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Pressure sensor we originally put next to charcoal canister under hood (we put the Tahoe canister in gap behind left headlight), then moved to filler neck return in rear thinking it was corrupting the test results. My theory was that the sensor should be able to be anywhere in the line between canister, tank, filler, etc-in the same 'void'. seems like that is true. What is VERY disturbing is that the evap test itself is riddled with bugs (which is why it is not required to pass on year to year testing) and must be patient and force vehicle to keep trying to run and pass test. We bought GM deal tool and forced test to run. Kept trying and trying. Many fails, only passed 2X times. Once it passes, fill tank to brim to prevent test from re-running before ref test!