I have a 2002 mercury Grand Marquis and I have had a P0306 for a year now and I have replaced spark plugs, the ignition coil, and all the fuel injectors are working and I cleaned them, I even rewired the fuel injector connector. but I still have the code and I don’t know what to do at this point I also recently had to replace my intake manifold because it broke as well
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What exactly am I poodle in this area Ik a little confused??
which part confuses you?
Do a leak down test on cylinder 6 to see if the problem is low compression due to valve stem seals, worn piston rings, etc.
I’m pretty sure all cylinders are good because the compression test said that most cylinders were between 120-125
That's why I suggested a leak down test.