Quote:
Originally Posted by Steeveedee
I don't recall seeing vapor recovery canisters on 3/4T and larger trucks in '71, and for certain they didn't have EGR. So there has been some swapping around going on. Has the cab on your truck been transplanted from a different vehicle? If so, and it was more recent manufacture than '71, it could have the vapor separator lines in the cab. It'll be obvious from looking at the tank, as there will be multiple lines to it, not just the fuel pump suction line. What does the SPID say about California emissions equipment?
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Definitely no EGR on mine, but rare as it may be it's all stock, cab and frame VIN's match, going by paint evidence not so much as a screw has been turned on the vapor recovery equipment in the cab, vapor return line, separator hoop up into the pillar and all. I am wondering if the charcoal canister may have been swapped for a newer one at some point but the rest is as it was built. I've also found the exact setup referenced in the 1971 Chassis Service Manual, it sadly doesn't include a vac system diagram. Its a CE241Z truck, no California emissions mentioned on the SPID, just built at Fremont going by the Z in the VIN, likely sold here in CO new.