04. 3.0 Cylinder 6 Misfire valve recession? Where to go from here?
I’ve got the dreaded PO 306 misfire in my 04 V6 ranger with the 3.0 engine. I think it’s gotta be the valve recession or th heads as it happens only at idle and wobbles for a minute before returning to normal just like the other people described, and it doesn’t do it if I hold the gas down and keep it above 1500 rpms or so. I’ve had spark plugs and wires and coil pack replaced by my mechanic and it didn’t help . I doubt it’s injectors or anything like that. I don’t really have the tools or time to tear this thing apart, how likely is it that it’s the valve recession?
I’ve been driving it for a few months and it happened after a month and in the month or two since it started misfiring it only got a little worse in that it happens a little quicker. If I ignore it what happens? How long do I have before I drop a valve? Will I still continue to wear out the heads and risk dropping a valve if I keep the rpms high and stop it from misfiring? What’s the best course of action here, it’s really not a bad truck besides this misfire issue. Someone saidthey replaced cam synchronizer and replaced the heads with some heavy duty ones and that seemed to fix the issue, but that was quite a few years back. Is there a consensus now on what to do with this misfire? Getting rid of the truck would be a real pain with the misfire so I’d either wanna drive it as is or get it fixed, or eventually just do an engine rebuild or put a new engine in it, or one from a ranger year without this problem. Any help would be much appreciated,
Thanks,
Peter
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