Beware charcoal canister breakdown! - ZR-1 Net Registry Forums

AustinJohn · 06-21-2014

I realize this is an old, old thread but having been chasing a "rough idle" in my '94 coupe (not the ZR-1) just ran across this and it was the silver bullet or at least one of three; the canister was bad, the line was clogged with charcoal pellets (blew those out with compressed air) and I replaced the purge solenoid while I was at it not knowing what was in it. All runs as it should now.

Many, many thanks! John PS The car gave me a BIG clue at the start of my hunt as opening the gas cap after a drive of any length (especially when it was a hot day) would release a tremendous "WHOOSH" sound but checking the Corvette Forum I found threads suggesting that was normal. In fact, it's not, just a symptom of a defective canister.

06-21-2014	#30
AustinJohn Join Date: Apr 2012 Location: Austin, TX Posts: 54	Re: Beware charcoal canister breakdown! I realize this is an old, old thread but having been chasing a "rough idle" in my '94 coupe (not the ZR-1) just ran across this and it was the silver bullet or at least one of three; the canister was bad, the line was clogged with charcoal pellets (blew those out with compressed air) and I replaced the purge solenoid while I was at it not knowing what was in it. All runs as it should now. Many, many thanks! John PS The car gave me a BIG clue at the start of my hunt as opening the gas cap after a drive of any length (especially when it was a hot day) would release a tremendous "WHOOSH" sound but checking the Corvette Forum I found threads suggesting that was normal. In fact, it's not, just a symptom of a defective canister. __________________ [SIZE=1] AustinJohn in Austin, Texas '90 Black/Gray ZR-1 #1723[/SIZE] [SIZE=1] Ported intake, Haibeck Chip, CORSA exhaust, 4.10 rear end, Hurst shifter, drilled/slotted rotors, stainless brake lines, 32mm sway bar, 170º thermostat '94 Red/Gray Coupe[/SIZE] [SIZE=1] Stock '85 Black/Black Coupe[/SIZE] [SIZE=1] Anything but stock (Lingenfelter 383 and every Lingenfelter mod available in '88 including 3:54 rear end, big brakes, Centerforce clutch, MSD electronics and Borla exhaust.) True "barn find" restored/upgraded by me beginning in 2010.[/SIZE]