Something odd happened to me yesterday and I need your expert advice and experience on this, especially since this is my first truck AND automatic vehicle in my 40 years of life.

1st off. 2004 F140 Lariat 4x4 Supercrew. Gotts mod, new plugs/COPS/fuel filter/K&N drop in, EDGE evo set on 2, tires are 325/65/18, 125,000 miles.

I was driving into a 25 mph headwind. Kayak was strapped to the top of the truck. Heading 20 miles down a paved road to the beach. I was traveling about 55 mph with cruise control on. The overdrive would cycle in and out every once in a while because of uphill grades and sometimes for no other reason than the headwind.

About 15 miles into the drive, I started loosing power. The truck was loosing speed and I killed the cruise control and manually tried to keep power, but the engine started pinging so I brought down the speed to about 30 mph. NO CODES or C.E.L. I quickly checked the transmission temp and it read 149*. Engine coolant temp at 198*.

After getting it into the city and going through town, the power was back. I took it on the beach, had a great day and stopped to eat. At the restaurant, I remembered that I had not reprogrammed the Edge to correct tire size. I wonder if that could have been the cause of the power loss?

Does anyone have any ideas what may have happened. The drive back was a piece of cake. I'm concerned by these events and don't want to experience them again. I want to fix any problem if I can.

EDIT UPDATE
HERE IS WHAT I HAVE DONE SINCE FIRST ENCOUNTERING THE PROBLEM

I have a chronic P0174 System Lean Bank 2. Causing quite a bit of pinging(yes...detonation ) even under medium acceleration.

I have lost signifigant power twice, limping to 30 mph. The power loss has happened twice on days with temps over 85* and usually after 15 minutes of driving.

NO CHECK ENGINE LIGHT

Here's a list of all mods and new parts
Gotts Mod
New Motorcraft Spark Plugs
K&N Air Filter
New Champion>Motorcraft fuel filter
New COPs from uneeksupply(questionable)
Edge Evo set at 2, wheels size set and shift firmness 12/12/9


Here is what I have checked and done with no change to the problem.

--Reset Edge to factory stock tune.

--Cleaned MAF and Throttle body.

--Fuel Pressure check (Edge readings)
40psi KOEO.
39-41 PSI cruising at 55mph.
Under acceleration range from 35-42psi with one low reading of 25 psi and one high reading of 50 psi. I'm talking blink of an eye reading.

--Initially changed old fuel filter to Champion AZ(autozone) filter. After three days, switched to a motorcraft filter just to rule out fuel filter.

--Engine Coolant temp has not gone over 198* during power loss.

--Tranny fluid temp at 160* during power loss

--Propane check for leaks. No change in idle.

--Fuel control module (under spare) shows no signs of corrosion.

--Replaced new COPs with old COPs. No change at all.

PROBLEM SOLVED
The dealership diagnosed the issue as clogged catalytic converters. I had a local shop cut out both front and rear cats and reweld o2 bungs so I could keep the sensors. Although noise was an issue, the engine problems were solved! The noise issue was resolved with a cherry bomb glasspack followed by a Dynomax Superturbo muffler.

 

A touch of bad gas? water in the tank?

if it only happened once then went back to normal I would think its just a fluke.

maybe you should check the fuel filter?
you might need a new one, or maybe you just sucked up a drug and it choked the truck a little?

is the air filter clean?

tire size would not do that I do not think.

temps seem normal, I run in that range, but my CHT is normally 208

that year truck has a really bad lean problem, but the level two should sort it out.

 

Clean K&N air filter, new COP's, new plugs, new fuel filter.

I would hate to leave it as a one time problem and then it come up again later.

Anyone else ever experience something like this.

 

Well, this morning, as I started off for work, the truck sputtered and went into failsafe mode.

I pulled two codes. P0351 (ignition coil 1 primary/secondary circuit) and P2106 (Throttle actuator control system-forced limited power)

What am I looking at here. Another bad "new" COP? Will that cause the TAC to throw a code?

 

my truck did the same, with the sputtering after a spark plug change, p0354... just switched 1 and 4, been runnin good since. dont know anything bout p2106 though.

 

Cool. I have a 3 week old Borg Warner COP that I will swap for the #1 COP.

When I first installed them the new set of COPs(uneeksupply), I had to immidiately change a bad COP. Maybe I got a bad batch from Uneeksupply.

 

Changed the #1 COP , reset codes, and all seems fine. I keep getting a P0174. I wonder if I have a vacuum leak somewhere. The code usually throws under med hard acceleration and I can hear a little bit of pinging at the time. I can't wait to get EVERYTHING ironed out so I can enjoy the hell out of this truck!

 

i've had the p2106 before as well. I was told that this code occurs in conjunction with another code (P0351). If you take care of the P0351, i think it should go away.

 

Isn't pinging detonation?

 

It happened again. 15 minutes after leaving work, truck got weaker and weaker until I was driving 30 mph. I kept waiting for a CEL or any code to get thrown but I got nothing. I've already changed the fuel filter, all COPs, and all plugs.

What problem would manifest itself after 15-20 minutes of 55 mph driving? Overheating fuel pump?

 

Maybe the wiggling pin has come out of the wobbling shaft? Just kidding but since u changed everything else I'd try looking for that vac leak I had one of those make my truck sputter a lot and seeing as u have one of those notorious models for being lean it may really worsen with a vac leak

 

Could it be the Champion AZ(Autozone) Fuel filter?

 

Well, it wasn't the fuel filter as I changed it to a Motorcraft and the problem did not go away.

It also was not a dirty Throttle body or dirty MAF since I cleaned them both and the problem did not go away.

Both PCV tubes looked perfectly fine as well.

The fuel module under the spare is not corroded either.

This truck will be running better than new when I find what's making it run like crap.

Hmmmm...I wonder...Since two new Uneeksupply COPS have already given me trouble....Maybe I got a bad batch of COPs

What if I were to replace all the new COPs with the old COPs. I would definitely put the two known good borg warners on the 3 and 4 plugs, because I don't want to mess with those. Then see if the problem goes away.

 

I forgot that the Edge can read fuel rail pressure. I'll check that first when I get home.

 

Thanks to those that have offered help so far. So far, I have not figured it out yet. If nothing else, I can use my own thread to keep track of my progress.

I have a chronic P0174 System Lean Bank 2. Causing quite a bit of pinging(yes...detonation )

I have lost signifigant power twice, limping to 30 mph. The power loss has happened twice on days with temps over 85* and usually after 15 minutes of driving.

I had a P2106 and a P0351 sending truck info failsafe. Swapped a questionable #1 COP to a known good and cleared those codes. They did not come back.


Here's a list of all mods and new parts
Gotts Mod
New Motorcraft Spark Plugs
K&N Air Filter
New Champion>Motorcraft fuel filter
New COPs from uneeksupply(questionable)
Edge Evo set at 2, wheels size set and shift firmness 12/12/9


Here is what I have checked and done

--Reset Edge to factory stock tune. Problem still there.

--Cleaned MAF and Throttle body

--Fuel Pressure (Edge readings)
40psi KOEO.
39-41 PSI cruising at 55mph.
Under acceleration range from 35-42psi with one low reading of 25 psi and one high reading of 50 psi. I'm talking blink of an eye reading.

--Initially changed old fuel filter to Champion AZ(autozone) filter. After three days, switched to a motorcraft filter just to rule out fuel filter.

--Engine Coolant temp has not gone over 198* during power loss.

--Tranny fluid temp at 160* during power loss

--Propane check for leaks. No change in idle.

--Fuel control module (under spare) shows no signs of corrosion.



So now... what's left that I can check before having to take it in. Replace new cops with old cops and see if there's any change.

After that, can I be looking at bad injectors? I wouldn't know what else it could be after that.