LS2 misfiring
05-20-2012, 11:21 AM
#1
LS2 misfiring Background:
06 GTO 48k miles
Basic Bolt Ons+Gears+Tune
Car had holes for switches drilled in center console and flowmasters when purchased (I'm guessing switch holes for nitrous) so it may have had a cam at one point.
Symptoms:
Rough idle and operation
Extreme loss of power
Flashing CEL
Codes:
Random Misfire
Injector Circuit Open Cylinder 2,4,6,8 (passenger side)
-Initially, the car would misfire, flashing CEL, no power. A minute later, the symptoms would disappear. No codes. This happened 3-4 times over the course of a month.
-Now, car misfires all the time and throws the before mentioned codes.
I have checked:
both Injector fuses(look Fine
the MAF harness visually(look Fine)
the injector and coil harness visually(look Fine)
and the plug wires visually(look fine)
My instincts say bad coil. If I had a scanner at my house, I would swap the coils and see if the injector circuit code moved to the other side of the engine. But I don't, and I don't want to limp it to Advance Auto Parts when it could be a problem with the valve train. So any thoughts?
06 GTO 48k miles
Basic Bolt Ons+Gears+Tune
Car had holes for switches drilled in center console and flowmasters when purchased (I'm guessing switch holes for nitrous) so it may have had a cam at one point.
Symptoms:
Rough idle and operation
Extreme loss of power
Flashing CEL
Codes:
Random Misfire
Injector Circuit Open Cylinder 2,4,6,8 (passenger side)
-Initially, the car would misfire, flashing CEL, no power. A minute later, the symptoms would disappear. No codes. This happened 3-4 times over the course of a month.
-Now, car misfires all the time and throws the before mentioned codes.
I have checked:
both Injector fuses(look Fine
the MAF harness visually(look Fine)
the injector and coil harness visually(look Fine)
and the plug wires visually(look fine)
My instincts say bad coil. If I had a scanner at my house, I would swap the coils and see if the injector circuit code moved to the other side of the engine. But I don't, and I don't want to limp it to Advance Auto Parts when it could be a problem with the valve train. So any thoughts?
Last edited by 409CISecondGen; 05-20-2012 at 11:38 AM.
05-24-2012, 06:46 PM
#3
Teching In
Join Date: May 2012
Location: Jacksonville, FL
Posts: 23
Likes: 0
Received 0 Likes
on
0 Posts
is it almost like a clicking? my 97 formula sounds like it has an occasional miss, but no lights, i have a new distributor cap, and i dont think its the plugs, try your wires i havent been able to do mine yet but i think thats what it is, i think mine are old and corroded
