I think it was just a hold over from running it without it plugged in for the seafoam treatment... as the SES light wasn't on...

I dumped in a bunch of injector cleaner, and it seems to run better/smoother... still a bit of a miss and a knock, but not quite as bad...

Hopefully the fuel filter finishes it off...

 

How much of a chance is there of fouling the plugs up when using seafoam? I just changed the plugs (ac delco $5.88 a piece) 10,000 miles ago, dont want to fudge them up

 

They might be good enough that they'll be unaffected...

If you still have your old plugs, you can always swap them in...


Since the problem has gotten a little bit better, with the injector cleaner, it's pretty much confirmed that it's a spark, or fuel issue...

It doesn't start missing until it hits low idle, once it does, it always misses, until it cools down again... Maybe I should get my battery/alternator tested, lol.

 

You shouldn't have any problems with your plugs. If you think that you may, then I would just remove them after you are done and make sure that none of them are fouled.

 

Well, I changed my radiator cap today, and topped up my coolant overflow tank...

The radiator was full, though, so I don't think I have to worry about a headgasket...

 

I suppose I should've updated this thread... My engine blew a connecting rod

Not bad, I suppose... Since it'd been making this noise for a good 15000km.