Tighten Gas Gap Message - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

UBB · 05-09-2018, 12:06 PM

Recently installed S/C and LTH and now in the last 500 miles I've gotten the 'Tight Gas Cap' warning twice.

where do I start trouble shooting this?

InFiD3ViL · 05-09-2018, 02:53 PM

I would start at the gas cap.

Not being a smart ass...well, not entirely anyway. But they do sometimes go bad, for lack of better words. I assume you have checked/tightened the cap? Have you tried swapping it out? Otherwise, the Evap system would be another place to start your quest.

Good luck man. This one can be quite a bitch to troubleshoot. Evap issues and leaks can trigger a false positive without triggering an actual Evap error.

ChibiBlackSheep · 05-09-2018, 02:59 PM

x2, I would check the gas cap to make sure the gasket still looks good and not cracking.

But with the install of the supercharger, did you mess with any of the evap system parts?

Russell James · 05-09-2018, 03:17 PM

The tank purge valve is in front of the passenger cyl head. Did the hoses and electrical connector get plugged back into that? With that message, sounds like either a tank purge hose did not get plugged back in, is leaking, not seated, or gas cap itself leaking. I'd take that purge hose off the purge valve and reinstall making sure it makes a positive click as it seats.

After you find the leak, it takes two drive cycles (cold start to operating temp) without the leak to clear the message. So after you fix something, give it a few days to see if the message goes out.

Welker2 · 05-09-2018, 03:18 PM

Could be coincidental to the install. As other's have said I'd probably start by replacing the cap even if it looks good. Could save you a lot of time and frustration trying to track a problem related to the install that may not exist if it fixes the problem. If not, you have only spent a few dollars, have a new cap and eliminated one of the possible issues. Good Luck.

UBB · 05-09-2018, 07:31 PM

could be a coincidence but I doubt it. Car only has 14K miles and had never done it. Now both times under the same driving conditions. I'll turn the car off, check the cap, fire it back up and the message is gone. But for peace of mind a new cap will be obtained.

Avenging Orange · 05-09-2018, 10:32 PM

Who did the work and who tuned it? That's where I'd start.

PalmerGA · 05-10-2018, 05:25 AM

Quote:

Originally Posted by Avenging Orange

Who did the work and who tuned it? That's where I'd start.

Ditto. I'd make extra-sure everything that was done is mechanically and electronically correct.

mov · 05-10-2018, 07:11 AM

Quote:

Originally Posted by Welker2

Could be coincidental to the install. As other's have said I'd probably start by replacing the cap even if it looks good. Could save you a lot of time and frustration trying to track a problem related to the install that may not exist if it fixes the problem. If not, you have only spent a few dollars, have a new cap and eliminated one of the possible issues. Good Luck.

Thank you for your service Chief! Spent 20 myself... Aim High

rontammy0 · 05-10-2018, 08:34 AM

Op.....I just had this exact message pop up on my 2017 Titan. I never even knew that message existed at all. Anyway I checked the cap and it was tight both times it happened. All I did was loosen the cap off....left it for a bit a re tightened it. Its been 6 days and the message hasnt returned.

detamble13 · 05-10-2018, 08:37 AM

This message has plagued my GMC Sierra for years. I've replaced the gas cap, vent valve solenoid, and the purge valve. The best way to track down a leak is to smoke the evap system and see where the smoke comes out (it's just heated veg oil). But as someone has already suggested I'd bring it back to the last place that did work/ mods on your car and let them know the problem.

Moto-Mojo · 05-10-2018, 09:02 AM

Amen on the evap issues being a royal pain. I have a 2001 Yukon that has thrown the evap code about 14 years of its life. Every two years at smog time I get to throw more money at buying parts and turning off the CEL. Only to have it reappear weeks later. It’s a scam! Good luck, OP. Hope it never comes up on my Camaro.

Alpha0523 · 02-16-2020, 11:16 AM

Just wondering if anybody knows where i can get a new gas LOCK for my 2011 r/s? The gas door is fine,the key broke off inside the [1800 km. from home] lock. Only have spare now and have tried amazon ,e-bay etc. Thanks for the help. BRIAN

Rons1le · 02-17-2020, 02:27 PM

After the installs is the evap still hooked up? Look under the hood on the passenger side where the fuel line is from the tank. Behind the ABS module. See if evap line is open. If it is go get the little rubber caps from auto parts store and put over the end.

Sent from my SM-G960U using Tapatalk

05-09-2018, 12:06 PM	#1
UBB Drives: 2018 ZL1 Join Date: Jun 2016 Location: Bismarck Posts: 572 View My Garage	Tighten Gas Gap Message Recently installed S/C and LTH and now in the last 500 miles I've gotten the 'Tight Gas Cap' warning twice. where do I start trouble shooting this?

05-09-2018, 02:53 PM	#2
InFiD3ViL Drives: 2010 CGM 2SS/RS LS3 Swapped A6 Join Date: Sep 2016 Location: Spring Hill, FL Posts: 4,575	I would start at the gas cap. Not being a smart ass...well, not entirely anyway. But they do sometimes go bad, for lack of better words. I assume you have checked/tightened the cap? Have you tried swapping it out? Otherwise, the Evap system would be another place to start your quest. Good luck man. This one can be quite a bitch to troubleshoot. Evap issues and leaks can trigger a false positive without triggering an actual Evap error. __________________ 2010 CGM Camaro 2SS LS3 Swapped A6 - GPI LS3 SS1 .647/.638, (224/237, 112 +4, 7º overlap) on CamMotion 8620 core, BTR Platinum .660" Dual Spring kit w/titanium retainers, CHE bronze trunnion upgrade, stock heads milled @ .015, Melling HV 10296 oil pump, TSP 1-7/8" long tube headers (W/Catless Off-road Pipes), Corsa Xtreme 3" Catback, GPI Ported/Rod Mod Intake, Stage 2 Ported Throttle Body, Vararam OTR CAI, Mike Norris Gen 2 catch can + GM 1LE clean side separator, 160º thermostat - Megan Racing adjustable coilovers (lowered 1.75"), MRR M017 10/11" wheels-Tuned by Ryan @ GPI

05-09-2018, 02:59 PM	#3
ChibiBlackSheep Drives: 2012 2SS/RS, 1968 SS Join Date: Feb 2012 Location: Southeast, PA Posts: 2,092	x2, I would check the gas cap to make sure the gasket still looks good and not cracking. But with the install of the supercharger, did you mess with any of the evap system parts? __________________ LS3 Crate Engine Swap \| CSP Custom Cam 232/240 .615/.615 113 +3 \| Stainless Power LT Headers \| Z28 Intake \| Borla S-Type Exhaust \| FTI Triple-Disc Billet 3200 Stall 2012 Camaro 2SS/RS \| 1968 Camaro SS \| 2020 Cadillac CT5 Premium Luxury \| 2021 Spark LS

05-09-2018, 03:18 PM	#5
Welker2 Ret AF, cancer survivor Drives: 2013 Camaro 2SS/RS & 2006 Corvette Join Date: Jul 2015 Location: Mesquite, NV Posts: 2,741 View My Garage	Could be coincidental to the install. As other's have said I'd probably start by replacing the cap even if it looks good. Could save you a lot of time and frustration trying to track a problem related to the install that may not exist if it fixes the problem. If not, you have only spent a few dollars, have a new cap and eliminated one of the possible issues. Good Luck. __________________

05-09-2018, 10:32 PM	#7
Avenging Orange Drives: 2010 Inferno Orange 2SS/RS Join Date: Apr 2010 Location: Clermont, IN Posts: 3,297	Who did the work and who tuned it? That's where I'd start. __________________ 2010 Inferno Orange 2SS/RS M6 Black Leather, Sun Roof, OBX Headers, Borla touring axle back, Cold Air Inductions CAI , non synthetic fluids, BMR total bushing upgrade/1" lowering springs, DSE 32mm rear sway bar. GM fe4 shocks/struts/LCA's, AAM 3.91 diff, Vertini RFS1.8 20x9 +30. Conti ExtremeContact Sport 275/35/20. sjm autoprod ABL dash kit. Mike Norris tuned 413/419. Avenging Orange: 43 years of not buying into the Hype........and damn proud of it!! https://youtu.be/9JD9it6SmB8 https://youtu.be/xmelTlEzI34 KICKING CANCERS ASS SINCE 2015!!

05-09-2018, 03:17 PM	#4
Russell James Drives: '15 SS 1LE, '69 Z28 drag car Join Date: Dec 2009 Location: Mich Posts: 4,482	The tank purge valve is in front of the passenger cyl head. Did the hoses and electrical connector get plugged back into that? With that message, sounds like either a tank purge hose did not get plugged back in, is leaking, not seated, or gas cap itself leaking. I'd take that purge hose off the purge valve and reinstall making sure it makes a positive click as it seats. After you find the leak, it takes two drive cycles (cold start to operating temp) without the leak to clear the message. So after you fix something, give it a few days to see if the message goes out.

05-09-2018, 07:31 PM	#6
UBB Drives: 2018 ZL1 Join Date: Jun 2016 Location: Bismarck Posts: 572 View My Garage	could be a coincidence but I doubt it. Car only has 14K miles and had never done it. Now both times under the same driving conditions. I'll turn the car off, check the cap, fire it back up and the message is gone. But for peace of mind a new cap will be obtained.

05-10-2018, 08:34 AM	#10
rontammy0 Account Suspended Drives: 2011 2SS/ RS INFERNO ORANGE L99 Join Date: Dec 2012 Location: Alliston Ontario Canada Posts: 9,057 View My Garage	Op.....I just had this exact message pop up on my 2017 Titan. I never even knew that message existed at all. Anyway I checked the cap and it was tight both times it happened. All I did was loosen the cap off....left it for a bit a re tightened it. Its been 6 days and the message hasnt returned.

05-10-2018, 08:37 AM	#11
detamble13 Drives: 2011 2SS/RS LS3 VR Join Date: Aug 2009 Location: Chatham, ON Posts: 661	This message has plagued my GMC Sierra for years. I've replaced the gas cap, vent valve solenoid, and the purge valve. The best way to track down a leak is to smoke the evap system and see where the smoke comes out (it's just heated veg oil). But as someone has already suggested I'd bring it back to the last place that did work/ mods on your car and let them know the problem.

05-10-2018, 09:02 AM	#12
Moto-Mojo Fast Cars and Old Guitars Drives: 2015 2SS RS (L99, baby!) Join Date: Apr 2012 Location: N. CA Posts: 3,973	Amen on the evap issues being a royal pain. I have a 2001 Yukon that has thrown the evap code about 14 years of its life. Every two years at smog time I get to throw more money at buying parts and turning off the CEL. Only to have it reappear weeks later. It’s a scam! Good luck, OP. Hope it never comes up on my Camaro. __________________ “I don’t want to belong to any club that would have me as a member.” - Groucho Marx

02-16-2020, 11:16 AM	#13
Alpha0523 Drives: 2011 CAMARO R/S LT2 Join Date: Feb 2020 Location: AB. canada Posts: 19	Just wondering if anybody knows where i can get a new gas LOCK for my 2011 r/s? The gas door is fine,the key broke off inside the [1800 km. from home] lock. Only have spare now and have tried amazon ,e-bay etc. Thanks for the help. BRIAN

02-17-2020, 02:27 PM	#14
Rons1le Drives: 2015 Camaro 2SS RS 1LE AGM Join Date: Oct 2013 Location: Galion, Oh Posts: 531 View My Garage	After the installs is the evap still hooked up? Look under the hood on the passenger side where the fuel line is from the tank. Behind the ABS module. See if evap line is open. If it is go get the little rubber caps from auto parts store and put over the end. Sent from my SM-G960U using Tapatalk __________________ 2015 2SS RS 1LE NPP/w Kooks headers, Procharged, ID1050X injectors, Katech belt tensioner, Mighty Mouse Catch Can, BMR subframe connectors, Matco driveshaft loop, AEM Wideband/Boost/Fuel gauges , Z/28 Splitter and Spoiler/w Wicker bill, Power Stop rotors and brake pads, MRR Z/28 Rep Wheels 20" w/p zeros 285 fronts and 305 rears, ZL1 addons Rock guards and Tow hook, Rear window louvers, Flags on the quarter windows and the moonroof, Billet aluminum door handles. Last edited by Rons1le; 02-17-2020 at 03:27 PM.