Low rpm missfire
05-21-2014, 05:50 PM
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Low rpm missfire I recently did headers and xpipe on my c5z. Now it will idle fine and drive fine. But as soon as it gets to operating temps I miss fires. The CEL is on, and it's giving me 2 leans codes and a random missfire code. Could the car being lean cause the missfire or is there another issue.
05-22-2014, 11:41 AM
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The lean condition could be causing your random misfire code if you have a scan tool see if it is misfiring on both banks or just one also see what both bank sensor 1o2s are doing might have a bad o2
05-22-2014, 01:35 PM
#3
I agree, sounds exactly like my problem, and if the fuel cycle doesn't go into closed loop then it has no issues (Monitored from torque app). But my bank 1 sensor has no voltage activity so if you get insufficient voltage from O2 code you likely need a Bosch13111 .
05-23-2014, 08:42 AM
#4
Popped in a new oxygen sensor last night and solved the problem completely including a P0300 random misfire condition caused by lack of fuel in closed loop. Even used the Bosch13111 since I got stainless headers coming in the mail. Hope this is your problem as its a $60 dollar, 20 minute fix.