Hello all. I installed a set of pacesetter lts with msd wires and ngk tr55 plugs. After the midpipes were installed i take it for a spin and boom, misfire. After scanning, we determine cylinder 1 was the culprit. During the header install my dumbass thought it would be a good idea to "wash" the coils (not completely submerging them). I replaced the coil on cylinder 1 and im still having the same problem. It will only misfire after i start the car and within the first 10-15 min of driving, after that the problem stops. i haven't gotten the car scanned again yet. I have poked around the misfire threads online and i can't seem to find anything that fits my problem. What should i do next? and/or any suggestions? Thanks for the help!
angry_torrid_04
Please Help! Misfire after header install
So you put the stocker back on and you still have a misfire?
What codes are you getting?
Need to be a little bit more specific.
What codes are you getting?
Need to be a little bit more specific.
Ya thats what doesn't make sense. Autozone just tells me it's a multiple cylinder misfire but can't tell me which cylinder. I plan to use a friend's tech 2 wednesday to try to follow the misfire as I swap pieces around. I thought I had eliminated all possibilities but i guess not.
I would start by doing the following:
Swap coil 1 & coil 2, see if problem follows.
Swap plug wire 1 & 2, see if problem follows.
Swap Plug 1 & 2see if problem follows.
Swap coil 1 & coil 2, see if problem follows.
Swap plug wire 1 & 2, see if problem follows.
Swap Plug 1 & 2see if problem follows.
you need to KNOW what cylinder is misfiring in order to diag that.
if its a multiple cylinder misfire its most likely a P0300.
ultimately you are over looking something you caused.
either you cooked more then one coil, or damaged one or more wire or plug.
if its a multiple cylinder misfire its most likely a P0300.
ultimately you are over looking something you caused.
either you cooked more then one coil, or damaged one or more wire or plug.
You need to get a better way to read the codes more regularly, if your getting the o2 codes then the CEL is going to be on regardless of whether your misfire is fixed or not. Get the o2 codes blocked and then see what's going on.
Thanks to all of you for your input! I plan to take the car to my buddy's shop tomorrow after my finals to trace this som b**** down so I will definately post an update as soon as it is or isn't figured out.
If I could remember the code from the autozone scanner I would share but unfortunately I can't.
I have been partially ignoring the engine light due to the fact that I know the o2s aren't happy. It just worries me when the CEL starts blinking (which is a misfire).
Besides the typical P0300 misfire code, what other "misfire" codes could pop up and what could be the difference?
If I could remember the code from the autozone scanner I would share but unfortunately I can't.
I have been partially ignoring the engine light due to the fact that I know the o2s aren't happy. It just worries me when the CEL starts blinking (which is a misfire).
Besides the typical P0300 misfire code, what other "misfire" codes could pop up and what could be the difference?
I did the same thing on my trans am, minus the washing.... because that doesn't sound like a great idea lol.
Go buy a reader for 30 bucks and then swap the coils around and see if the problem chases the coil.
Go buy a reader for 30 bucks and then swap the coils around and see if the problem chases the coil.
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