Hi everyone, hope you all are doing well.
So my 07 GT (6-speed) is experiencing two misfire codes. At first, it was P0304, so I checked the front bank of spark plugs and found the plugs and boots to be covered in oil. I changed the valve cover gasket and tube seals on those, and the code went away. I checked after driving a bit and the plugs/boots are no longer dripping with oil. I did NOT change the rear valve cover gasket/tube seals under the upper intake plenum.
Just to confirm my understanding, the cylinders are numbered as followed if you're standing in front of the car facing the engine:
1 2 3
4 5 6
... correct?
I drove maybe 70 miles last week, ran great with no codes and parked it for a day or so. I went to go on a weekend trip only to discover the SES light was on AGAIN, but this time for P0302 misfire. It seems to idle a little high, but not terrible overall. I hardly even noticed the P0304, and was only alerted to it via the SES light.
Now, I've gone and removed the intake manifold plenum (which I REALLY did not want to do... again) because I figured it was the same problem as the fronts, but it turns out the plugs and boots are already dry. The plugs are NGK iridiums, and were only changed less than 20k miles ago (currently @ about 155k, timing belt was done not long after plugs) so I don't think it's that. I have not checked the gap yet, but I don't see why that would suddenly come about so soon.
My question is this: what tests could I do while it's all torn apart like this? What should I look for? Should I just put it back together and run some injector cleaner/marvel mystery oil through it? Should I bother changing the valve cover gasket if no oil is leaking? I've read that these codes can sometimes come and go.
Any input is appreciated. Let me know if I missed any important details.
Thank you
So my 07 GT (6-speed) is experiencing two misfire codes. At first, it was P0304, so I checked the front bank of spark plugs and found the plugs and boots to be covered in oil. I changed the valve cover gasket and tube seals on those, and the code went away. I checked after driving a bit and the plugs/boots are no longer dripping with oil. I did NOT change the rear valve cover gasket/tube seals under the upper intake plenum.
Just to confirm my understanding, the cylinders are numbered as followed if you're standing in front of the car facing the engine:
1 2 3
4 5 6
... correct?
I drove maybe 70 miles last week, ran great with no codes and parked it for a day or so. I went to go on a weekend trip only to discover the SES light was on AGAIN, but this time for P0302 misfire. It seems to idle a little high, but not terrible overall. I hardly even noticed the P0304, and was only alerted to it via the SES light.
Now, I've gone and removed the intake manifold plenum (which I REALLY did not want to do... again) because I figured it was the same problem as the fronts, but it turns out the plugs and boots are already dry. The plugs are NGK iridiums, and were only changed less than 20k miles ago (currently @ about 155k, timing belt was done not long after plugs) so I don't think it's that. I have not checked the gap yet, but I don't see why that would suddenly come about so soon.
My question is this: what tests could I do while it's all torn apart like this? What should I look for? Should I just put it back together and run some injector cleaner/marvel mystery oil through it? Should I bother changing the valve cover gasket if no oil is leaking? I've read that these codes can sometimes come and go.
Any input is appreciated. Let me know if I missed any important details.
Thank you