Spittin Sputterin and Smokin
This morning I had anticipated doing a major tune up on the ole nag so I'd feel comfortable driving from FL to WA in a few weeks. Well, when I cranked her over this morning she did nothing but spit, sputter and bellowed smoke (unburnt fuel) out the tailpipe. I shut her down, left her sit for a while and cranked her over again. After a few secs of the same she settled into her normal cold engine high idle. I did drive to the store and back and she seems to run fine but there's still a light fuel smell. Reminded me of using Seafoam, it was that bad.
I haven't done the tune up yet so here's what's there and when I last did it, my truck has 120k on it now.
Oil/Filter: Motorcraft 5/20 and S400 - 700 miles ago
Air filter: K&N drop in - cleaned 700 miles ago
Fuel filter: Ford parts - 5k ago
Rad fluid: can't remember brand - 5k ago
Cleaned OEM IAC even though it was pretty clean - 5k ago
Cleaned MAF - 5k ago
SeaFoamed - 5k ago
PCV: Ford parts - 10k ago
CPS & CMP: Ford parts - 17k ago
Plugs: Autolite APP104 gapped to .044 - 20k ago
Wires: Ford parts - 20k ago
I've checked for air and fuel leaks and haven't found anything but I did find a rad overflow hose leak at the overflow reservoir that was clamped and fixed. The current plugs at cyls 1, 2, 3 had carbon build up but 4, 5 & 6 were surprisingly clean. I cleaned the carbon off the plugs, checked the gap and put them back in which resulted in a slightly smoother running engine. MAF, TB and IAC still look clean.
Any ideas what could have caused this to happen?
2002 Edge SC 3.0 Auto