Ford 7.3L Power Stroke (1999-2003) :: F250 - No Power / Shuddering Under Load
Jan 29, 2016
I will start with what I have done to my truck. Hutch and harpoon mod, fuel pump, new orings on fuel lines, fuel filter, air box, 4" exhaust. My issue only happens when my engine is warmed up and I put it under a load(driving up a long hill or pulling up a long hill). My truck starts to shudder and feels like missing until it looses all power to where it won't even pull itself and will just barely idle. It doesn't die though. I watch the engine oil temp and it seems to be around 195-200 when it occurs. I can turn the truck off and let the oil temp cool to 150-160 and then start the truck up it will miss for a second then clear up. I will start driving again and it seems fine until the oil temp gets up and start putting it under a load. I have read many posts and can't figure out exactly where I need to start. Some of the codes I pulled are P0603, P0470, P0732, P0542 and P1211.
View 14 Replies
Advertisement
Ill start off with my mods and recent maintenance things I have done before fully describing the issue.
E99 7.3l with 190k on the clock
Full 5" turbo back
TS-6 chip
EGT, Boost and trans temp gauge
New ford glow plugs
Re-orings injectors
new valve cover gaskets
new fuel filter and fuel lines
new turbo with a ww2
Newer trans and oil pan
I think that should do it, now for my problem. The truck starts good cranks over once and is running with no hesitation, the engine run a little rough, more than normal vibration at idle almost like a small miss. No smoke at idle.
While driving with no/little load on the engine runs great , but under load there is a good amount of white smoke/ oil smell. The turbo is new and is not leaking oil I have already checked over that and the exhaust is new but there is some oil that is at the tail pipe in liquid form. The exhaust up pipe that goes to the turbo is not covered in oil either
The truck cruising in OD or in 3rd with O/D off around 2k rpms it shudders real bad almost like the truck is going to shake its self apart. but at like 2400 rpms and above its fine. Where is a good place to start the diagnosis as I am pretty new to the Diesel world. From what I've read it looks to be either rings are junk or maybe I have some bad injectors (thats what it feels like to me) but would that cause it to smoke like crazy?
View 3 Replies
1994 f250 7.3 turbo problem.. runs great on the level.. Cruises 65 no problem.. We have an 8% grade coming from town and half way up it starts cutting out and sounds like a jack brake under the hood and loses power.. Once over the top it clears out and runs fine again.... I just changed the fuel filters but no luck... I have been wrenching on cars all my life but no diesels..
View 6 Replies
I have a 2001 F450 7.3 chassis cab with just over 100k. I have a new problem... So far on two different occasions the service engine came on followed by a loss of power under a load and white smoke from the exhaust. Took it to the shop the first time, they determined it to be a dirty air filter, which seemed odd since it just happened all of a sudden. They changed air & fuel filter, problem gone- for two weeks..
View 8 Replies
I bought a 99 f-250 7.3 a month or so ago and am impressed with the level of knowledge and hospitality you all show. This is my first diesel so I am completely new to a lot of the issues that occur with one and many of the diagnostic tests needed to troubleshoot.
When I purchased the truck the guy said it was very cold natured and I would have to plug in the block heater if it got chilly out. I didn't realize just how bad that problem was and have since had to keep it plugged in even on very mild nights to get a quick start. I have been very careful to let it warm up for 15-20 mins before I start driving it.
Also, I have noticed at around 40-55 MPH and light pressure on the gas I get a shudder, it was worse before I added a friction modifier to the oil but it is still there constant in overdrive.
As I was driving two or three days ago in a light rain (the first since I bought the truck) I noticed the SES pop on and stay on. Being new to the diesel world I immediately pulled into Autozone and tried to get a code, but with no luck. The truck has been running a bit rougher since the light came on and I am noticing a marginal power loss.
So my questions are: Where can I get the codes pulled off? I have been looking at buying a scan tool but the AE is out of my price range and the other options seem to have mixed results. Also, do any of the problems seem to be related or could it just be a few different issues that need to be ferreted out? From what I've read it seems possible for the UVCH to be the issue here, is that correct?
Again, I am really new to diesels so I may have been having loss of power even before this and not known it due to my inexperience.
View 12 Replies
2002 F350 7.3, MANUAL transmission ZF6.
Bought this truck used for hauling an excavator, and after fixing damn-near everything engine/turbo/and-cooling-system-related ---- it's finally seeing some use.
Just recently started hauling 12,000lb payloads. When I accelerate hard in Low gear, and then shift into 1st and accelerate hard again, I feel the whole truck shuddering. It's like a shimmy-shaking vibration all through the vehicle.
It doesn't happen in higher gears, only when the following conditions are met...
1) Starting from a dead stop
2) 12,000lb payload (heavy)
3) Accelerating hard (Low, First gear)
I would also like to add that I experienced this shuddering vibration very intensely when I put the transfer case in 4wd LOW (front manual hubs left unlocked) and towed 14,000lb up a steep hill in 1st, 2nd, and then 3rd transmission gears.
^^^ By leaving front hubs unlocked and transfer case in 4wd LOW, I was effectively lowering my final drive ratio even more for extra pulling power in 2wd hill-climbing. I don't do this often, only when absolutely necessary. ^^^
I must also add that I do have slightly taller rims/tires than OEM ford WITH the original ford gearing (3.73) so I'm more like 3.51 final drive ratio.
02 F350 7.3l ZF6
View 14 Replies
My truck was shuddering in od. So as I last effort thinking it might be injectors I pulled all of them and replaced all of the orings and valve cover harnesses. After all of this was done seemed to do nothing at all. Now a new problem has surfaced. It's having idle problems. It will now idle at 780-850 instead of 650-700rmps. Also on deceleration it will miss pretty bad. Checked all of my injectors again all connections are good and all of the injectors are tight. Not burning any oil. So I unplugged the icp and bam runs like a top perfect running engine. So I bought a new one and plugged it in and itake doing the same thing. So what is going on! Also it was throwing a random check engine light but wouldn't bring a code up I'm completely lost....
View 2 Replies
02 7.3L SD Im on a long haul and think I might have bought some bad diesel. It is shuddering a little kind of like a miss. It started right after I stopped for fuel. Is this going to damage my engine to keep plugging along? Is it just going to run kind of rough until I burn up the bad fuel? Ive got about 200mi to go so just needed to know if its safe to keep driving or am I going to be stranded.
View 13 Replies
Been fighting a coolant issue on '02 F250 4x4 with 7.3. Truck runs hot when under load (ie towing, or ac running on a hot day going down the road). Will sit and idle all day with ac on high and 100 outside. I hear my fan at cold start as normal but that's the only time I hear it. Still has original water pump, fan clutch and radiator. I know all three could stand to be replaced with 340,000 on it. But can't afford to do it all at once.
View 14 Replies
First off I have a 2001 7.3 with 294000 miles. While pulling my camper after it gets warm it puts out a very loud whistle it seems to happen when the fan clutch kicks in it does not sound like a belt squeal it almost sounds like it's coming from the turbo area. The engine seems to Surge while this is going on but the RPM gauge doesn't dictate that it almost sounds like it's the fan clutch surging. I took a short video of it while it was doing it ...
View 14 Replies
I have a 2006 F250 6.0 Amarillo Edition. 133,000 When I bought the truck it was a theft recovery vehicle where the turbo, injectors, FICM and wiring harness were stolen. The company I bought it from replaced the injectors, wiring harness-new, and a used FICM, and turbo. Also has EGR delete and SCT tuner with basic tunes. I believe the SCT was put on to mask another problem. No dealer would spend that kind of money to sell a truck unless something was wrong. The truck would accelerate some with the tuner but shift the tires so hard it would bark them. I removed the tuner and went back to stock program.
The truck will barely move and takes a long time to accelerate under a load. In park and neutral it is fine. A friend has a ford diagnostic program on his computer and says the readings were all good except EBP was a little high. Removed exhaust and air intake to verify no restrictions. Turbo sounded like the vanes might be sticking so I replaced the turbo and VGT solenoid. Now truck feels like its trying to make more boost but not transferring power to the engine. Have blown the silicone hose off twice now during testing. Checked the EBP sensor and tube and only thing I see is a little carbon buildup inside the sensor. What else to check. I'm new when it comes to diesels.
View 6 Replies
The issue: when I reach 37-40mph I have a new sound which I believe is the transmission 4R100. It sounds like a flat spot on a tire, or the sound tires make when they leave the sticker on them. The cadence of the sound is slower than the rotation of the wheels.
If I let off the accelerator, the sound stops, as soon as I add load by pressing the accelerator the sound returns. If I shift to Neutral the sound is gone.
If I coast at any speed the sound is gone. It is only audible when under load at speeds above 37-40 mph. The cadence does increase as I speed up, but it doesn't sound as fast as the motor is turning (~1900 rpm's).
I monitor the truck with torque pro using the PIDs defined here on FTE. I can see lock-up in 3rd and the shift to overdrive. When in lock-up, I see 1-7rpm TCSlip.
Watching transmission temp as reported by torque, the hottest I see is 183* pulling an enclosed 6x12 @ 75 mph. Ambient temp is 95*. Excursion currently has 240k miles on the clock.
This sound was first heard by my wife two weeks ago. I thought I had tire issues and they needed to be rotated. The sound is still present, and now identified only when the truck is in drive, and under load, regardless of me pulling a trailer.
Yesterday on my 500 mile trip, the truck hiccuped several times which I believe was around the time I was either moving in or out of overdrive. Details in a different thread: [URL] .....
Anyway, I've looked at all culprits and can't find anything with the motor, or electrical system. I can't get to a transmission shop until Monday, and won't have my AE until I get home Sunday night. I have a 500 mile run tomorrow. I checked the transmission fluid and it's at a good level, pink, and doesn't have a bad smell.
View 14 Replies
I have an 03 F250 7.3litre. I have noticed the last few times driving while hauling that my vents start pushing hot air when under a load (example: driving up a long, steep pull) even if I have the AC on. It's starting make me a lot hot under the collar (pun intended) .....
View 14 Replies
Ok, I have owned my truck for almost a year and it has 151,000 miles. I have noticed on a few occasions puffs of blue smoke and especially at night in the headlights behind me I notice a lot of smoke when I'm getting into the throttle hard. Under normal driving conditions I don't usually see anything.
Today I noticed it when I was backing my camper(8000lbs) up a small hill onto the side of my garage. It was puffing blue pretty good going up the hill while it was under load.
I have no check engine light on, the truck seems to be running fine. My oil consumption is about 2 quarts every 3-4000 miles. I tried the blow by test with the oil cap but besides some smoke out the filler neck no problems... I don't know very much about diesels so for me to try and trouble shoot this is a problem.
View 9 Replies
I have done some searching on this, seen a video on YouTube but haven't read anything that is firm on what it is. We pulled our 5er for the first time last weekend and the chatter was pretty pronounced in the Arbuckles here in OK. I was running around 65 mph when I hit the largest hill and as I was climbing my speed naturally dropped, boost was around 17 - 18 psi when the chatter started.
Is it something to be really concerned about? Is there anything to be done to prevent it? I'm pretty much still stock, only deletes have been airbox to 6637, and I deleted the heater by turbo for the boost gauge. Other than that everything on truck is still stock.
View 2 Replies
I just finished a cab swap and I'm having a little trouble. Here's a link to what I've done : [URL] ....
KOEO the WTS light, battery light, SES light all stay on and no power to fuel pump. No communication with PCM (using AE). All fuses are good, but no power to PCM fuse (#22). When I apply 12v to #22, the truck will start and idle - but poorly because I still don't think fuel pump comes on. The idiot lights all stay the same.
I did get to pull codes while it was running and got stuff like IAT circuit high (its not plugged in), fuel pump relay short to batttery, and a few other short to battery things (park assist stuff IIRC). I thought that might have something to do with the redneck idea to boost the fuse with an external power source?
Just thinking while typing, I don't have 3rd brake light hooked up yet (just thought of that, I'll hook it up first) and bed/bumper are not installed, so no tail lights or park assist stuff is hooked up. I'm also not using overhead computer, so it's not plugged in.
My next step is to go back through all of the connectors and make sure something isn't 1/2 way plugged in or possibly plugged into the wrong place(s).
Looking thru the wiring diagrams is not a strong subject for me, but I was trying to figure out how power gets to the fuse and how PCM relay works (does it complete circuit to ground to energize the coil?).
View 14 Replies
1999 f250, 280,000 miles. I use Power Service with every tank, oil changes every 3500. Had a few of the injectors changed several years ago after getting bad fuel. Tranny "built" when rebuilt, about 60,000 miles ago.
Truck starts and drives every time, no miss or rough idle, no smoke. Just not as much power. It downshifts sooner and really seems to resent towing my atv trailer. Where do I start ?
View 8 Replies
OK . So here's the deal. My 2000 7.3 ford f250 170k miles. Going from phx az to flagstaff az . For some reason I'm hitting about 40 miles per hour with the pedal all the way down going up a decent grade. Seems like something isn't giving the motor power. I'm pulling a 28 ft toy hauler pretty much empty . Under 5800 pounds . What this could be . Also was get pretty close to the red on water temp gauge.
View 14 Replies
As I'm cruising once I hit about 50mph I start getting a vibration in the peddles and floor board. It's not real bad but noticeable for sure. When I hit 70mph it's worse and the truck even sounds like it's vibrating. As soon as I let off the peddle and coast everything is golden.. Smooth.. So it seems to be a problem only under power..
A little back story : About a year ago I was getting bad vibration and loosing power. I put it in the shop and the mechanic said the filter or screen in the gas tank was clogged so he cleaned it. I went to Korea for a year so the truck sat in government storage for a year. When I got it back in March I put in back in the shop to have the front passenger side hub replaced.
I don't know if any of that has to do with the vibration I'm getting now.
Truck
2003 F250 ext cab
7.3l
179k miles
View 6 Replies
There was no power getting to the fuel pump on my 2002 Ford F250 73 diesel traced it back to the inertia switch no power in or out but I'm getting power at the fuel pump relay put the code scanner to the PCM and no communication....
View 9 Replies
I've got a 2000 F-250 with a 7.3. The other day I was driving down the road and it lost power and my foot almost went to the floor. I was at the bottom of a hill when it did this and I was running 60 mph. By the time I got to the top I was running 20 mph and had the truck to the floor. When I was driving it home it was tacking around 1800 rpm and my egts were only at 125 degrees. I know I'm not getting fuel. I thought it could be the fuel filter so I changed it. Still no luck. It'll start back up but it dies if I take my foot off the accelerator. It shook terrible when I was driving it home too. Is it injectors, uvch, hpop, or something else?
View 14 Replies
