Seafoam treatment on the Mini.
Got the spray can with a long tube to spray the stuff into the intake. I started out putting it down the PCV vent hose, but I didn’t think that would get the stuff onto the intake valves like I’d prefer.
On my particular Mini R56, a previous owner had done some PCV delete kit. Not sure what this kit accomplished as it blocks the PCV hole on the lower intake and moves it up to four ports that he tapped into the intake. A year ago, I undid this mod since the little tiny plastic tubes used in this kit crumbled and caused a ton of codes for unmetered air. I blocked the ports and put the original hose back on, and it was fine.
But the misfires began a couple weeks back, and walnut blasting the intake seemed imminent. I got the walnut blasting materials and prepared for the procedure. But I’d thought I’d try the Seafoam treatment first before tackling the walnut blast.
I wasn’t sure the Seafoam shot into the PCV hose was working, but then remembered those little ports right at the intake valves. Yep, the Seafoam hose fits right in and I was able to put it right in where it was needed (with a helper to keep the revs up). Did it work?
I’d say it did. No more misfires or rough and stumbling idle. Idle is smooth and even, with no codes. I still think the job of walnut blasting will do a better job, but for now I’ll run it this way until it becomes an issue in the near future.
Also, I’m nearly done doing a fuel tank swap on the 2010 Crown Victoria I sold my nephew. I’ll grab a pic or two of that one.
That’s a whole other story.