I have a 2003 GTX 4-tec supercharged with 137 hours. At about 135 hours it ran absolutely perfect but since then its gone down hill fast. Cylinder #3 is the problem. Some how oil is getting inside the cylinder and a drop will get on the electrode which causes it to not spark and in return will not run. The part I don't understand is as long as it stays running, it runs perfect, idle and WOT. I can shut it down for 5 minutes and restart it no problem. If its at operating temp and I shut it down for more then about 10 minutes it wont restart. Once I take it home, let it cool down a bit, pull the plug and clean the drop of oil off the electrode, it will restart. I did do a compression test on that cylinder and its at 120 psi and the other 2 were at 160. However it was cold when I did the test. The only other helpful bit on information I have is that the engine has ran over heated a little before this all happened. I'd say for maybe a minute I had to run it while the beeper was trying to make me go death. This happened a few times because I had to limp it to a safe spot to cool it down. It ended up being a pretty fast coolant leak which I found to be caused by a bolt that almost came completely out from the coolant pump housing. Its fixed now.
But does anyone have any ideas why I'm getting oil on my one sparkplug? I sure hope its not the valves! But what else could it be?
But does anyone have any ideas why I'm getting oil on my one sparkplug? I sure hope its not the valves! But what else could it be?
