EVAP delete + weird idle question - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

JHart · 05-03-2016, 11:14 PM

Okay so first off, since I installed my headers, my car occasionally will idle like there is a misfire, and drives like its missing at light to partial throttle, but cleans up at WOT(or at least feels like it). Ive replaced plugs & new wire set, checked all connections on headers to ensure no leaks, and made sure the o2's haven't touched the headers and burnt any wires. My next thing is not long afterwards I got a p0455 code for large Evap leak or whatever. My question is, do these two go hand in hand with each other, if so and its EVAP related, is there a way you guys have deleted the entire emissions system in this car? In a non emissions state so in unconcerned with EVAP staying. Any and all help will be greatly appreciated 👍🏻

JerTM · 05-03-2016, 11:26 PM

It's possible the purge valve is leaking. Disconnect the evap line from the purge solenoid and see if you have vacuum from the solenoid while the engine is running.

JHart · 05-04-2016, 11:05 AM

Will try that today when I get off man! Any other ideas? Also anyone fully delete the EVAP system?

JHart · 05-08-2016, 09:16 AM

Okay guys, had a buddy datalog my car, and It's like neither front o2 sensor is reading, as they're both not cycling, which is causing the funny idle and rich condition and stumbling. Car has brand new o2 sensors and o2 extensions. What should I be doing? I don't understand. Reason for new o2's is I attempted to extend the o2's myself and they burnt at the headers, so I bought new o2's and extensions. Any input would be greatly appreciated!

Davidd_SS · 05-08-2016, 05:27 PM

If you burnt the o2's and replaced check your o2 sensor fuse is blown, check the fuse box under the hood for the fuse it's a 15 or 10amp fuse I believe. I'm almost certain that's your problem. P0455 usually happens when there's a random cylinder misfire.

05-03-2016, 11:14 PM	#1
JHart I haz camaro again :) Drives: 2010 Chevrolet Camaro 1SS Join Date: Mar 2009 Location: Union, South Carolina Posts: 660	EVAP delete + weird idle question Okay so first off, since I installed my headers, my car occasionally will idle like there is a misfire, and drives like its missing at light to partial throttle, but cleans up at WOT(or at least feels like it). Ive replaced plugs & new wire set, checked all connections on headers to ensure no leaks, and made sure the o2's haven't touched the headers and burnt any wires. My next thing is not long afterwards I got a p0455 code for large Evap leak or whatever. My question is, do these two go hand in hand with each other, if so and its EVAP related, is there a way you guys have deleted the entire emissions system in this car? In a non emissions state so in unconcerned with EVAP staying. Any and all help will be greatly appreciated 👍🏻 __________________ 2010 Camaro 1SS(back in a camaro again, yessssss!) 2010 silverado z71 ccsb(sold, old dd) 2010 camaro1ss(sold, missed, will have another someday)

05-04-2016, 11:05 AM	#3
JHart I haz camaro again :) Drives: 2010 Chevrolet Camaro 1SS Join Date: Mar 2009 Location: Union, South Carolina Posts: 660	Will try that today when I get off man! Any other ideas? Also anyone fully delete the EVAP system? __________________ 2010 Camaro 1SS(back in a camaro again, yessssss!) 2010 silverado z71 ccsb(sold, old dd) 2010 camaro1ss(sold, missed, will have another someday)

05-08-2016, 09:16 AM	#4
JHart I haz camaro again :) Drives: 2010 Chevrolet Camaro 1SS Join Date: Mar 2009 Location: Union, South Carolina Posts: 660	Okay guys, had a buddy datalog my car, and It's like neither front o2 sensor is reading, as they're both not cycling, which is causing the funny idle and rich condition and stumbling. Car has brand new o2 sensors and o2 extensions. What should I be doing? I don't understand. Reason for new o2's is I attempted to extend the o2's myself and they burnt at the headers, so I bought new o2's and extensions. Any input would be greatly appreciated! __________________ 2010 Camaro 1SS(back in a camaro again, yessssss!) 2010 silverado z71 ccsb(sold, old dd) 2010 camaro1ss(sold, missed, will have another someday)

05-03-2016, 11:26 PM	#2
JerTM Drives: 2011 2SS/RS M6 Join Date: Oct 2015 Location: Utah Posts: 1,940	It's possible the purge valve is leaking. Disconnect the evap line from the purge solenoid and see if you have vacuum from the solenoid while the engine is running.

05-08-2016, 05:27 PM	#5
Davidd_SS Drives: LSX FTW Join Date: Feb 2016 Location: Florida Posts: 526	If you burnt the o2's and replaced check your o2 sensor fuse is blown, check the fuse box under the hood for the fuse it's a 15 or 10amp fuse I believe. I'm almost certain that's your problem. P0455 usually happens when there's a random cylinder misfire.