Hello all and thank you to everyone who my help!
i have had my fair share of time in front of the computer with the Google search bar.. and I still cannot seem to find the cause.
Here is the question I have been asking around..
Will I have been chasing a misfire on my 2005 LGT for the last two years, swapped coil packs-nothing, new plugs-nothing, swapped injectors, seemed to help then came back in different cylinder. (Moved from cylinder 3 to cylinder 4) this was two years ago. Shortly after that happened I had to use 87 octane because that's all I had available. The code went away on its own. Self cleared the code and the idle was smoother... Weird eh? So i continued to use it for the next two years
.. I know my bad.. It's not good for the car.. I just had the car serviced and changed plugs again and did my regular maintenance (clutch with flywheel, timing belt) even replaced the Passenger side head. (Cylinders 1 & 3 side) because one cylinder had a bad leak through one of the exhaust valves.(showed 60% on the leak down test) And had a used spare kicking around that was good to go. After we changed everything and was using 91 gas again (have been fore a few months before the work and no code..). I put a few thousand kms on it and everything was good until this week. Misfire in cylinder 4. And it will only throw the code when you start the car from stone cold and let t idle to warm up. If I start it and its drive, nothing. If it warms up and throws the code. I can clear it and it won't come back. It seems to trip when the car goes from and open to a closed loop once it warms up... I really don't believe its an injector.. If it was this would of happened more. I changed the fuel dumper on the fuel rail as it as showing wear and some rust. As the other side looked newer. But was actually original to the car. Wait till next morning, started it let it idle and no code.. Sweet finally fixed!? ... Nope came back this morning.. My last thoughts are that it may be the fuel pump getting tired or fuel filter?. But not sure. Sorry for the long read. If you ave any ideas feel free to speak up! And the car has 148000km currently it.
Please feel free to ask any other questions you have. I will check this daily
(Also I believed I posted this in the right spot, I am a little new to forums)