Hello all, have read through most all of the threads here and think I have an idea on how to move ahead. Still, here are the symtems.
2000 SD V10 4:30 SWB 4X4 W/ whipple & K&N intake ( since 500 miles ) also, nearly straight through exaust. I bought it new and did these mods myself. I used to pull a toy hauler ( 8K LB ) nut now an enclosed car trailer thats around #5500. I have always used premium. 32K on the clock and no hot rodding while towing.
The truck sets allot since I am overseas ~6 months out of the year.
Soooo, I get home and the boys want to go to the dunes riding. No problem, wrong, dead battery ( original ) slow charge that for about 4 hours and end up having to jump it from another battery. Starts right up, idles fine. Head to the gas station quick since I don't like leaving old gas in it, only this time I've really let it get down there so I have to go to the nearest fly by night station. I know most folks use these because of price but also know they usually don't buy 91 so I only put half a tank until I can get to a Cheveron station on the way. All is well until I pull the first grade and just over the top it starts to blubber on me, as it gets back into overdrive I can feel a definite missfire. I continue on and we get some riding in all the while I am wondering what the heck is going on. I disconnected the batteru while we were riding as well. We load up to go grab some food so I take the time to fill it up and add some fuel treatment thinking injectors from setting. NOT all the way home ( 80 miles ) it is missing and sucking the gas down. I get home and find this site, head straight for the coils by disconnecting them one ny one and think i"ve found #4 bad as it makes no difference when i pull the connector. Head to Ford and get a new one, install, same problem, in fact it seems that the whole bank with the exception of #1&2 don't make much difference. For reference I don't wash the engine, the coil I pulled out had a nice plyable boot and the plug looked as though it had been firing. I messed with it some more and got a bit frustrated. I took it to my pal who is not exactly into these new deals ( a top fuel guy ) who just happens to have a hand held, he spends about 20 minutes, can't read anything ( no codes ) and suggests that I start using the process of elimination using the new coil. My questions are as follows:
If I got some bad gas and it plugged the filter would I not get some lean indication? or does it back down and adjust A/F mixture
Have any of you had more than one coil go after putting a load on your rig for 5 minutes @ 4% ?
I really distrust dealers so am the type that will spend days instead of changing parts, I am at the point that I may have to get them to run some spark wave forms in order to tell what cyl it is or ???
I am in Chad just now and am trying to get a game plan together for when I get back home. First thing is the filter ( fuel ) but I'm not covinced. Any advice is welcome.

 

I'm in the same boat as you, have been in Afghanistan the last year and the truck sits for 6 months at a time.

One thing that sounds bad to me is leaving the tank empty when you roll out. This is actually bad to do. The problem is condensation in the tank when it's empty. If you leave it full and add some stabilizer to it, it keeps the condensation and the subsequent problems from occuring.

Pull the fuel filter and check for water or contaminents. If this seems okay, you may want to drop the tank and check the pick-up for clogs or varnish.

Other than that, I've put a slightly oiled rag in the intake and exhaust, disconnected the battery and basically just had the oil changed from synthetic to conventional before storing it. Some folks like to use fogging oil in the cylinders as well, it gives a good coat to the cylinder walls and combustion chamber.

If you don't want to do all this stuff, make sure you have someone that can drive it once in while and get it all the way up to operating temperture. Don't just let it run in the driveway for a few minutes, make sure it gets driven a ways and heats everything up. Otherwise, all that happens is you build condensation in places that you don't want it.

BFR

 

Welcome to the site!

Did the truck run OK before you put the "fly-by-night" fuel in it?

 

Hi, you said it had a dead bat. and you disconnected while playing? Asking because any comp. controlled vehicle I've ever owned has a "re-learn" mode of up to 150 miles for the comp. after a battery hookup. That could cause your symptoms. Just an idea.Good Luck. '78 6.0 Powerstroke SMS

 

The truck sat for about thirty days., I work a 28/28 schedule and yes the truck ran fine last trip home. It ran fine to the station and for about 25 miles after putting about 15 gallons of what I now think of as old / contaminated gas. I make a point to get it out nad put a few miles on it just so the seals, battery Ect: stay in shape. I also consider myself a pretty good wrench but admit I have not messed with OBDII vehicles. Prefer the old L88 69 Chevell ( which I had to replace the voltage regulator while home ). This one has me fooled ( not that hard to do ) I Can't get my head around the idea that the thing can misfire so bad that it could NOT be ignition, or, if it was starving for fuel why it has not thrown a lean code. I will change the filter as I have a feeling I did get some bad. Also, the battery indicator stayed RED even after the two hour run. I guess it has a couple of dead cells. In my mind if it cranks / starts the truck, it should not cause any of my current symptoms. On the other hand if I knew that I would not be asking all you folks. Thanks for the quick replies.

 

Finally made it back from overseas, changed the fuel filter and wahla, a load of c%#p came out the exhaust on initial start up, seemed to idle down nice but when power braking it still has a slight misfire. Have not had time to test drive. I cut the old filter apart and it did not look to bad. Guess I'll do some coil swapping when I get time.

 

just gotback from Ford ( met an old friend working there ) not good news, #5 & #10 cylinders have little or no compression !!! Suspect burnt exhaust valves. 32K miles ( 20 ) with the Whipple on it. Beware, as I suspect it was lean since installation and Whipples PCM did not pick it up. Anyone else out there ever have to do a valve job ona V10 ?