Left Bank Misfire...I have a 4cyl LS1??
09-03-2014, 01:29 PM
#1
On The Tree
Thread Starter
iTrader: (2)
Join Date: Dec 2013
Location: Texas
Posts: 143
Likes: 0
Received 0 Likes
on
0 Posts
Left Bank Misfire...I have a 4cyl LS1?? Ok everyone I have an issue that I just cannot figure out. When starting my car from a cold start it idles and runs great, but once the car is warmed up (closed loop) I get a terrible misfire at idle. If I let the car idle and its misfiring I can take off the entire left bank's fuel injector plugs and it runs the same with no change in the misfire so it seems like the left bank is cutting out.
Frankly, Im astounded that an LS1 is capable of running on only the right bank. While driving I can feel the left bank cut in and out intermittently. If Im at a stop light it will run normal for a second and then the left bank will drop out again....give it a bit of gas itll come back then once the idle stabilizes and drops down the left bank will drop again.
So far I have checked all of the grounds(back of the heads), removed them, inspected the wires and reinstalled the grounds. Everything there checks out. I also ohmed out the injectors and they are within spec. (13.5-14.0 ohms). I do have an SES light but I am unable to pull the codes because I do not have a scanner.
Mods are LT headers and EGR/AIR delete (tuned out), Magnaflow Catback.
Any ideas?
Frankly, Im astounded that an LS1 is capable of running on only the right bank. While driving I can feel the left bank cut in and out intermittently. If Im at a stop light it will run normal for a second and then the left bank will drop out again....give it a bit of gas itll come back then once the idle stabilizes and drops down the left bank will drop again.
So far I have checked all of the grounds(back of the heads), removed them, inspected the wires and reinstalled the grounds. Everything there checks out. I also ohmed out the injectors and they are within spec. (13.5-14.0 ohms). I do have an SES light but I am unable to pull the codes because I do not have a scanner.
Mods are LT headers and EGR/AIR delete (tuned out), Magnaflow Catback.
Any ideas?
09-22-2014, 06:01 AM
#5
Is there any way to clean the O2 sensor?