Ya, I was hoping for good stories of it being used to make him see its not bad
. I wouldn't do the treatment without him saying go for it.
BTW its a gen 1, 1996
Hi,
I have had a similar problem, if you'll see my "fluctuating idle" thread.
I went through changing the tps, the IACV, plugs, boots, coil packs, etc. etc., but was still having the problem and finally took the car in.
Mechanic said I had 50psi of compression loss on cylinder 7, and 20psi on cylinder 8 (20psi isn't that much, but it was misfiring), and it was likely some damaged valves.
I've also read elsewhere that these two cylinders are trouble spots in the 4.6l engine (who knows?)
*I did not tear apart the intake to check the IMRC's because something I read about "symptoms of a bad IMRC" made me think it would not apply.
Anyways,
I brought the car home and used 2 bottles of seafoam, a day apart, through the brake booster, and my problem actually mostly went away (no more crazy idle, but still some roughness). I poured the seafoam into a squeezable bottle (think old school ketchup dispenser) and squeezed it into the brake booster hose a little at a time, carefully.
I got the smoke show both times (as well as when I did it through the pcv several months ago).
*On a side note. If you do the seafoam, it's great to wait until someone starts tailgaiting you-- on your smoke drive-- then blast them. lol.
Hopefully you get your problem figured out, and it's not valves like mine apparently is. But as for the seafoam, I've had no problem with it so far.