This is getting ridiculous
03-29-2009, 02:36 PM
#1
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This is getting ridiculous My car is a 99 camaro z28 LS1. I have a cylinder 1 misfire and i cant figure out what it is for the life of me.
I had the cats checked just for the fun of it.
I checked the coil pack to see if it was working along with the plug and wire and everything seems fine.
I had trouble codes go off for the misfire, coil pack A, both catalyic efficiency below threshold codes, and every once in a while the O2 sensor will come up.
I dont know what else i can check. I am not paying $65 an hour to get this thing checked so they can tell me its something simple as an O2 sensor.
If anyone has and idea of what i can do next please tell me.
Thanx
I had the cats checked just for the fun of it.
I checked the coil pack to see if it was working along with the plug and wire and everything seems fine.
I had trouble codes go off for the misfire, coil pack A, both catalyic efficiency below threshold codes, and every once in a while the O2 sensor will come up.
I dont know what else i can check. I am not paying $65 an hour to get this thing checked so they can tell me its something simple as an O2 sensor.
If anyone has and idea of what i can do next please tell me.
Thanx
Last edited by stumpy9011; 03-29-2009 at 02:46 PM.
03-29-2009, 03:33 PM
#2
My car is a 99 camaro z28 LS1. I have a cylinder 1 misfire and i cant figure out what it is for the life of me.
I had the cats checked just for the fun of it.
I checked the coil pack to see if it was working along with the plug and wire and everything seems fine.
I had trouble codes go off for the misfire, coil pack A, both catalyic efficiency below threshold codes, and every once in a while the O2 sensor will come up.
I dont know what else i can check. I am not paying $65 an hour to get this thing checked so they can tell me its something simple as an O2 sensor.
If anyone has and idea of what i can do next please tell me.
Thanx
I had the cats checked just for the fun of it.
I checked the coil pack to see if it was working along with the plug and wire and everything seems fine.
I had trouble codes go off for the misfire, coil pack A, both catalyic efficiency below threshold codes, and every once in a while the O2 sensor will come up.
I dont know what else i can check. I am not paying $65 an hour to get this thing checked so they can tell me its something simple as an O2 sensor.
If anyone has and idea of what i can do next please tell me.
Thanx
You could take 10 minutes to swap the 02 sensors from side to side and see if that same cylinder is showing the problem. If it is you just ruled out the 02 sensors.
Swap spark plug wires as well...rule them out.
Then pull spark plugs and swao them into the bad cylinder.
Then finally swap a coil and rule out the coil.
I think you'll find your problem in about an hour.
Could also be a bad injector in that hole...either dirty or leaking like a bitch.
03-29-2009, 04:45 PM
#3
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only three reasons why a cylinder would misfire
1) compression
2)fuel
3)spark
gotta be one of those, once you determine its not one of them move to another test
1) compression
2)fuel
3)spark
gotta be one of those, once you determine its not one of them move to another test
03-31-2009, 02:31 PM
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More often than not, the plug wire just isn't seated all the way. It should click twice on the coil and once on the plug. Could be a loose ground wire also.
Could be a bad plug, bad wire, bad coil, loose connection, arc to the header. Pull the plug and inspect it, check the resistance in the wire to see if it's bad (should be a few hundred Ohms or less), check the wire connections to see if they are bent or rusty or something, etc., etc.
Could be a bad plug, bad wire, bad coil, loose connection, arc to the header. Pull the plug and inspect it, check the resistance in the wire to see if it's bad (should be a few hundred Ohms or less), check the wire connections to see if they are bent or rusty or something, etc., etc.
