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

VetteMed · 05-18-2011

As mentioned in my hi-miler thread, it would be a smart idea to check your charcoal canisters periodically. Mine started to deteriorate, and sent charcoal pellets all through the vacuum lines, solenoid, and presumably into the intake and cylinders as well.

I recently noticed that the engine would fire at the first crank, very unlike what an LT5 should be doing. I now figure this was due to constant fuel vapor venting from the tank into the intake, since the purge solenoid was lodged open due to charcoal pellets present.

New canister is around $60, new purge solenoid around $30. Guess it's still cheaper than owning a boat.

GOLDCYLON · 05-18-2011

Andrew thanks for this post. Do you have any details on the parts number etc any install instrustions? Removal techniques?

VetteMed · 05-18-2011

Sure thing.

The charcoal canister is located upside-down, behind the RH rear wheel, above the black plastic access cover. Note that this cover is not present in the equivalent location on the LH rear wheelwell area, so it should be obvious where the correct location is on the RH side. After removing the access cover, there's a friction type strap around the canister which can be loosened with a flat-bladed screwdriver, there's 2 spring hose clamps to remove, and there's 2 plastic clips over the "top" of the canister which is actually the part closest to the ground in this case. incidentally, it's this upside-down mounting that makes failure of the canister particularly likely to cause the dissemination of charcoal particles.

GM PN for the canister is: 17090139
I purchased an aftermarket (Standard Motor Products) CP1031 for a few bucks less.

UPDATE: The Standard Motor Products canister is the OEM Rochester unit, with a GM part number on it.

Replacement of the purge valve is only needed if you find charcoal particles in the lines. it's located under the plenum, just aft of the 2 large breather hoses. It's secured by 2 - 8mm bolts.

The purge valve PN is 01997201 for ACDelco. Note that the new valve does NOT come with the bracket, you must save and reuse your original.

GOLDCYLON · 05-18-2011

Quote:

Originally Posted by VetteMed

Sure thing.

The charcoal canister is located upside-down, behind the RH rear wheel, above the black plastic access cover. Note that this cover is not present in the equivalent location on the LH rear wheelwell area, so it should be obvious where the correct location is on the RH side. After removing the access cover, there's a friction type strap around the canister which can be loosened with a flat-bladed screwdriver, there's 2 spring hose clamps to remove, and there's 2 plastic clips over the "top" of the canister which is actually the part closest to the ground in this case. incidentally, it's this upside-down mounting that makes failure of the canister particularly likely to cause the dissemination of charcoal particles.

GM PN for the canister is: 17090139
I purchased an aftermarket (Standard Motor Products) CP1031 for a few bucks less.

Replacement of the purge valve is only needed if you find charcoal particles in the lines. it's located under the plenum, just aft of the 2 large breather hoses. It's secured by 2 - 8mm bolts.

The purge valve PN is 01997201 for ACDelco. Note that the new valve does NOT come with the bracket, you must save and reuse your original.

Awesome thanks Andrew.. I will replace for GP. Where did you order your aftermarket canister from?

VetteMed · 05-18-2011

Rockauto, under 50 bucks before shipping.

-Andrew

GOLDCYLON · 05-18-2011

Ordered thanks

VetteVet · 05-20-2011

Same thing happened to mine. Advance Auto had a replacement for 52.99.

Z51JEFF · 05-20-2011

Ive got something I need to take a look at,whenever I put the car in the garage I can smell gas at this corner of the car.If gas fumes flow through the canister shouldn't there be no smell?

Daniel_Mc · 05-20-2011

I was going to check the one in the 91 and found the line that was caped off and in the rocker panel went to this canister? What would the reason be for bypassing this?

-=Jeff=- · 05-20-2011

Quote:

Originally Posted by Z51JEFF

Ive got something I need to take a look at,whenever I put the car in the garage I can smell gas at this corner of the car.If gas fumes flow through the canister shouldn't there be no smell?

If it is working correctly.. then yes, no gas fume smeel

05-18-2011	#1
VetteMed Join Date: Mar 2009 Location: Orlando, FL Posts: 1,828	Beware charcoal canister breakdown! As mentioned in my hi-miler thread, it would be a smart idea to check your charcoal canisters periodically. Mine started to deteriorate, and sent charcoal pellets all through the vacuum lines, solenoid, and presumably into the intake and cylinders as well. I recently noticed that the engine would fire at the first crank, very unlike what an LT5 should be doing. I now figure this was due to constant fuel vapor venting from the tank into the intake, since the purge solenoid was lodged open due to charcoal pellets present. New canister is around $60, new purge solenoid around $30. Guess it's still cheaper than owning a boat. __________________ 2004 Z06/Z16 LeMans Commemorative Edition 1991 ZR-1 #302 White/Gray (sold) 1991 ZR-1 #1147 Red/Saddle (sold)

05-18-2011	#2
GOLDCYLON Join Date: May 2007 Location: Peoria, AZ Posts: 9,153	Re: Beware charcoal canister breakdown! Andrew thanks for this post. Do you have any details on the parts number etc any install instrustions? Removal techniques? __________________ GOLDCYLON - 91 ZR-1 #2014 GOLDCYLON - 90 ZR-1 #2794, 4L60e (Formerly Schrade's) GOLDCYLON - 11 CTS-V Arizona State Director 91 WHITE/BLACK #2014. 380 P&P&PCed,Ported Heads, Jeal Long tubes, Corsa Exhaust/FIKSE FM-5s /LED TLs, LED Headlights, Front Wilwood 6 piston narrowlite calipers and rear Wilwood caliper street shop mod,CNCed Coolant Pipes,TPI Cvr,Filter cover,Stainless Bolts, DRM/DOM PROM /ZFDOC mod build #102,DRLs,BMAD with stainless Debris Screen,Coplan Air Blaster, Pioneer APP Radio 4,Brey-Krause HB,Sub Bar,Fire extinguisher seat mount,DRM Coilovers,LEDs everywhere,Compass mirror (orange),V1 DIC hidden display, Homelink sun visor, Carbon Fiber top x3 and APSIS Carbon Fiber interior, APSIS CF Steering Wheel/NAPA Leather, Banski trailing arms, Guldstrand front suspension,urethane bushings from Prothane (total suspension) ZFDoc drive shaft safety loop, raptor shift light (orange),AO engineering louver front plate, Console seat cushion, 96CE seats with black custom Sheepskins, ss billet catch can,Viper remote entry/alarm,Cragar Rear Louvers,LED side louver lights, Dewitts Radiator with SPAL fans and a Woods 160 T-Stat 90 RED/BLACK #2794. 4L60e Automatic Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless Headers, Corsa Exhaust, SAN Secondaries and Haibeck PROM, Exotic Muscle Coil overs, LED Interior Lights, LED Tail Lights, LED Headlights, 94 Sport seats with black custom Sheepskins , Cragar rear louvers, GS Front calipers, Banski Trailing arms, APSIS Carbon Fiber steering wheel, Front and Rear Baer Eradispeeds, DRLs, Guldstrand front suspension,urethane bushings from Prothane (total suspension), Dewitt's Raditor with Dual SPAL fans and a Haibeck 170 T-Stat 11 RED/GREY CTS-V Last edited by GOLDCYLON; 05-18-2011 at 12:57 PM.

05-18-2011	#3
VetteMed Join Date: Mar 2009 Location: Orlando, FL Posts: 1,828	Re: Beware charcoal canister breakdown! Sure thing. The charcoal canister is located upside-down, behind the RH rear wheel, above the black plastic access cover. Note that this cover is not present in the equivalent location on the LH rear wheelwell area, so it should be obvious where the correct location is on the RH side. After removing the access cover, there's a friction type strap around the canister which can be loosened with a flat-bladed screwdriver, there's 2 spring hose clamps to remove, and there's 2 plastic clips over the "top" of the canister which is actually the part closest to the ground in this case. incidentally, it's this upside-down mounting that makes failure of the canister particularly likely to cause the dissemination of charcoal particles. GM PN for the canister is: 17090139 I purchased an aftermarket (Standard Motor Products) CP1031 for a few bucks less. UPDATE: The Standard Motor Products canister is the OEM Rochester unit, with a GM part number on it. Replacement of the purge valve is only needed if you find charcoal particles in the lines. it's located under the plenum, just aft of the 2 large breather hoses. It's secured by 2 - 8mm bolts. The purge valve PN is 01997201 for ACDelco. Note that the new valve does NOT come with the bracket, you must save and reuse your original. __________________ 2004 Z06/Z16 LeMans Commemorative Edition 1991 ZR-1 #302 White/Gray (sold) 1991 ZR-1 #1147 Red/Saddle (sold) Last edited by VetteMed; 05-21-2011 at 11:44 AM.

05-18-2011	#5
VetteMed Join Date: Mar 2009 Location: Orlando, FL Posts: 1,828	Re: Beware charcoal canister breakdown! Rockauto, under 50 bucks before shipping. -Andrew __________________ 2004 Z06/Z16 LeMans Commemorative Edition 1991 ZR-1 #302 White/Gray (sold) 1991 ZR-1 #1147 Red/Saddle (sold)

05-18-2011	#6
GOLDCYLON Join Date: May 2007 Location: Peoria, AZ Posts: 9,153	Re: Beware charcoal canister breakdown! Ordered thanks __________________ GOLDCYLON - 91 ZR-1 #2014 GOLDCYLON - 90 ZR-1 #2794, 4L60e (Formerly Schrade's) GOLDCYLON - 11 CTS-V Arizona State Director 91 WHITE/BLACK #2014. 380 P&P&PCed,Ported Heads, Jeal Long tubes, Corsa Exhaust/FIKSE FM-5s /LED TLs, LED Headlights, Front Wilwood 6 piston narrowlite calipers and rear Wilwood caliper street shop mod,CNCed Coolant Pipes,TPI Cvr,Filter cover,Stainless Bolts, DRM/DOM PROM /ZFDOC mod build #102,DRLs,BMAD with stainless Debris Screen,Coplan Air Blaster, Pioneer APP Radio 4,Brey-Krause HB,Sub Bar,Fire extinguisher seat mount,DRM Coilovers,LEDs everywhere,Compass mirror (orange),V1 DIC hidden display, Homelink sun visor, Carbon Fiber top x3 and APSIS Carbon Fiber interior, APSIS CF Steering Wheel/NAPA Leather, Banski trailing arms, Guldstrand front suspension,urethane bushings from Prothane (total suspension) ZFDoc drive shaft safety loop, raptor shift light (orange),AO engineering louver front plate, Console seat cushion, 96CE seats with black custom Sheepskins, ss billet catch can,Viper remote entry/alarm,Cragar Rear Louvers,LED side louver lights, Dewitts Radiator with SPAL fans and a Woods 160 T-Stat 90 RED/BLACK #2794. 4L60e Automatic Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless Headers, Corsa Exhaust, SAN Secondaries and Haibeck PROM, Exotic Muscle Coil overs, LED Interior Lights, LED Tail Lights, LED Headlights, 94 Sport seats with black custom Sheepskins , Cragar rear louvers, GS Front calipers, Banski Trailing arms, APSIS Carbon Fiber steering wheel, Front and Rear Baer Eradispeeds, DRLs, Guldstrand front suspension,urethane bushings from Prothane (total suspension), Dewitt's Raditor with Dual SPAL fans and a Haibeck 170 T-Stat 11 RED/GREY CTS-V

05-20-2011	#7
VetteVet Join Date: Jan 2009 Location: Mandeville, LA Posts: 340	Re: Beware charcoal canister breakdown! Same thing happened to mine. Advance Auto had a replacement for 52.99.

05-20-2011	#8
Z51JEFF Join Date: Dec 2007 Location: Fremont,Ca Posts: 3,039	Re: Beware charcoal canister breakdown! Ive got something I need to take a look at,whenever I put the car in the garage I can smell gas at this corner of the car.If gas fumes flow through the canister shouldn't there be no smell?

05-20-2011	#9
Daniel_Mc Join Date: Jan 2007 Location: Pineville, LA Posts: 586	Re: Beware charcoal canister breakdown! I was going to check the one in the 91 and found the line that was caped off and in the rocker panel went to this canister? What would the reason be for bypassing this? __________________ [COLOR=black]Daniel McGuffee [/COLOR] [B]1989[/B] Red Coupe #10166 [COLOR=black][B]1989 [/B]Black[/COLOR][COLOR=black] Coupe #23990[/COLOR] [COLOR=black][B]1991[/B] ZR-1 White #1639[/COLOR] [COLOR=red]FRANK APPROVED ZR-1[/COLOR] [B][COLOR=red][COLOR=black]1996[/COLOR] G[/COLOR][COLOR=blue]rand[/COLOR] [COLOR=red]S[/COLOR][COLOR=blue]port[/COLOR][/B] [COLOR=black]Coupe #564[/COLOR] ======================================== "It's not about the car, it's about the people..." DJ Don't forget to support your [URL="http://corvettemuseum.com/"]National Corvette Museum[/URL]!!!