Soo, been chasing this misfire for a few weeks, it usually runs fine, until I park, run into the shops, then it starts.
Iid tool says cylinder #4 each time. Removed the plug, it's dry when this happens, so assuming injector is sticking shut, replaced coil, swapped coils, no change when it's happening.

Interesting this is, when I disconnect the battery for about half an hour, she runs fine again. When it's warm, my negative is wiggly, I've tried to snug it up various ways, could this be the culprit finally?

I've run 2.bottles of injector cleaner through it and it has Marvel Mystery Oil in the tank at the moment, it's driving me nuts!

2010 5.0 SC

Well outta luck, it did it this morning after parking, can't get it to stop now, have fully seated both battery terminals, they were both suspect.
Sometimes after putting the cleaner in, it would start to misfire, then clear itself up, so clearly the cleaner is doing something.

Seems like it's trying to tell you, injector 4 is faulty, they do tend to fail intermittently first so it's giving you warning...

If number 4 has failed I expect the others won't be far behind....! Pete
I now have permission from the boss to use Y.O.L.O. Enjoy life
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2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Sold
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