Ford Super Duty (1999-2016) :: F350 Missing At High RPMs
Feb 9, 2014
I have a miss at high rpms.. I pulled this engine, manual trans, and 4x4 axle and put them in my F350 Majestic motorhome. 156,000 miles on the engine. Slightly dusted engine with good compression 375-400 (cranking and corrected for altitude). Has a little bit of a long start.
No smoke on start up unless 10 degrees or colder
No smoke when pulling either.
Glowplugs ...Good
GPR... Good
Checked resistance from IDM to injectors ...Good
History of some ether for starting before I got my hands on it. I have AE with the ford enhancement. But I am new to working on a powerstroke and new to AE.
ICP ...new
CPS...new
Oil ....new
EBP...new
Installed a pressure gauge to the drivers side upper port on my fuel bowl:
60 psi at idle
55 psi at WOT 2500-3000 rpms under a load
HPOP stabilized pressure is 2750 @ 40% duty cycle
Truck still misses (semi-intermittently) at higher rpm with a load.
Rechecked codes KOEO: None present
I visually inspected valve movement while running (idle). Did the buzz test when cold.... All injectors sounded the same when tested individually.
Did a cct when not completely warm:
P0266
p0272
Repeated the test at normal operating temperature:
P0266
Torque values on rocker arms bolts and injector holds are good. Fuel quality isn't an issue since this problem has remained for 5 tanks of fuel. What I should do next?
View 1 Replies
Advertisement
I have a 03 F250SD with ~145,000 miles on the 5.4L. Just recently I have been having what seems to be a miss, or possibly a dead cylinder. I thought it might be a dirty MAF, but I cleaned it and have the same problem. The miss is more noticeable at the higher RPMs. I am checking the plugs today. So any solution? I refuse to take her to the shop and having another man up in her manifold.
View 8 Replies
2003 F250. 6 speed. 5.4 2v. 4x4. 165,000 miles
When purchased, there was a vacuum leak and truck ran like crap and PO drove it that way for a while. I fixed the vacuum leak, discovered a miss between 1,500 and 2,000 rpms in every gear while accelerating. No miss at idle.
The truck has:
- no CEL
- new Motorcraft spark plugs that were not dropped, bumped, or over torqued.
- new fuel filter
- new air filter
- new alternator
*The miss usually does NOT happen in the morning on the way to work after sitting 14 hours.
*The miss almost always goes away after the truck gets up to operating temp.
*The miss ALWAYS is present after work on the way home after sitting 9 hours.
Fuel pressure?
Bad COP?
Fuel Injector?
Something totally different?
View 14 Replies
I have 2005 f250 5.4l 3v that was having miss problems between 1200 and 2000 RPMs. Changed VCT solenoids which worked, but then could hear chain hitting cover when powering down throttle on left side. Figured chain tensioner was bad, so tore down and removed timing cover. Found left chain was tighter than what seems normal, and right side had huge amount of slack. While taking off tensioner on left side, something happened to fast for me to see it, and still not sure if what happened wasn't just my imagination. I thought that the chain moved very fast for an inch or two. Anyways, I watched how to video on timing the 3v, but I am very confused about it. The left bank seems to line up on timing marks perfectly, but the right chain is off by at least 2 1/2 links. Not knowing any better, I removed three rockers on left bank (2 intakes and 1 exhaust) but only removed two intake rockers on right side. I don't know what I am doing and getting scared.
View 1 Replies
1995 7.3L f350 400k mi developed 1poss 2 cyl miss does not change after warm up and will die after 10 min .
View 1 Replies
I'm trying to find to rear axle ratio on my 2001 F-350 dually and the axle code seems to be missing.
View 12 Replies
Truck sat for 1 1/2 years. Changed filter and put in 15 gallons of fuel. Had maybe 1/2 gallon old fuel in tank. MAYBE. Fixed fuel line because it wasnt getting fuel and it fired right up and idles great.
Truck has no acceleration over 2500 (or so) RPMs but idles fine. This is depending on how hard you push the pedal of course.
If you drive the truck normally like a grandmother it seems to be ok. As long as you dont need a passing gear or need to accelerate more than 1/4 pedal
If you try to push the pedal to get the next higher gear it will sometimes hit the gear fine. IF you floor the truck it will totally lose acceleration. Then the truck will run like crap even slow for a good while. But then it will clear up for the low end. Then you can drive it normally. Then when I think I can test the upper end I get the same thing again.
View 14 Replies
1999 F350 7.3 Super Duty surges when going uphill with a load. The only time we drive it is when towing the horse trailer - also has a camper on.
The truck doesn't physically surge, just the RPM gauge goes up and down and along with it a humming noise.
Also, What conditions should I engage the towing button on the end of the gear shift? I've heard several answers. Should it be engaged when towing or off?
View 2 Replies
Truck: 2001Ford F350 5.4 auto 4x4
Issue: Engine seems to free rev over 2500 RPMs. Barely hits 50 MPH. Revs fine in park, no power in gear. At 1/4 throttle it will move, but sluggish at best. Once you get around 2500 RPMs it stops accelerating and just revs. Does this in every gear, and gets worse the faster you go. feels like its stuck inbetween gears almost. No CEL's
Replaced: MAF, TPS, Trans fluid and filter, fuel filter, cleaned intake system, fuel system treatment, O2 sensors. Trans fluid was dark, but no burnt smell.
I'm about to pull the exhaust and look for a clogged cat.
View 6 Replies
I've got a 2000 F350 crew cab with a camper I bought in Chile and I'm going to be driving it from the tip of south america back to the US. It's a 9 month epic family road trip. It'll involve crossing the Andes several times and going over 15,000 ft. There are roads up to 19,500 ft in various places.
My question is am I going to have problems with the altitude? What can i do about it? I've got another truck which is a unimog, it's slow as hell but has a special kind of booster gas you can inject in to the engine to get it started in very cold weather and at high altitude. I chose the F350 for the truck instead of the unimog because a unimog is slow as hell (think 40mph max speed), but it handles extreme conditions well.
View 10 Replies
1999 F350 Crewcab 4x4 dually V10. Fan switch only works on High. All fuses and relays look Good. Is it a bad speed control switch? What can it be?
View 8 Replies
So basically I thought it would be a great idea to degrease my motor from the top down.... After washing I start it up and drive down the road to head abunch of misfiring under heavy load or high rpm's.
My problem is that the misfiring won't throw a code. I then proceeded to buy a new ignition coil (thinking this was the problem) but with no code to go off which cylinder was bad I just switched the good ignition coil into each cylinder and starting it.
Up each time. None of them seemed to make it better. Also the injectors all seemed to be good. So what to do ?
2002 Ford F-250 5.4l
View 3 Replies
New too my Ford, but anyway it's -10 Celsius. My trucks been idling for a few hours and probably will all day because of my job. Usually idles about 600rpm normally. So today the oil temp was about 80degrees Celsius. Then the truck idled up too about 1000rpm for a while. If I touch the gas it goes back to normal idle speed but then starts idling up again after 30 sec. What temp does the truck want too keep it at?
View 3 Replies
2013 F350 passenger headlight bulb keeps blowing both high and low? Replaced 2 times now?
View 1 Replies
I have a 2005 f350 6.0 has 585000. Installed new hpop and lpop and new ipr .pressured oil system with air don't hear any leaks. After truck done started then put truck together no start same problem as before. No oil pressure on dash. All checks goqd except not enough high pressure.
View 2 Replies
I need fixing my 2003 f350 6.0 diesel, I have been working on this truck for a while and still am having problems, here was the original symptoms:
-Hard start or no start on a sunny day
-Rough idle for 10-15 minutes
-Rough shaking in the low RPMs (35 mph)[/COLOR]
-Slow response from the gas pedal
-boost would only get to 14
My dad and I then did many things to the truck in the shop, those things are:
-Air test and replacement of coupling going into oil branches (next to HPOP)
-Replaced EGR valve (no good)
-Replaced ICP sensor (leaking oil)
-Replaced ICP sensor and IPR valve piggtails (due to frayed wires)
-Cleaned Turbo
-Cut MAP sensor hose and reattached it (spliced on the end)
-New battery
-Performed a bubble test and found two bad injectors on passenger side (injectors #5 and #7)
-Cleaned and lubed tops of injectors
-Replaced O rings and copper crush washers on all injectors
-Replaced nipple cup O rings (tight)
-Blew out injector cups
-Bubble tested after injectors put back in (no more bubbles)
-New FICM, EGR cooler and oil cooler were already installed
-Ohm'd main engine wiring harness (good to go)
-Taped up frayed wires on fan clutch connection
-Increased wire gauge on the positive jumper between both batteries
-Sanded each ground on the batteries and engine, cleaned battery clamps, lithium greased connection points.
-Checked fuel for air (no air)
-Checked fuel psi (85 psi, plenty)
-Oil changed
After doing all of this (diagnosing as we fixed each thing) we now fixed many things including the hard/no start problem. Now, for the first three to five minutes:
-It starts right up
-Runs perfectly, no shake and instant response from the gas pedal and turbo
-Boost goes to 28
-ICP is 800-950 on idle
-IPR is 25-26.9% closed
After five minutes however:
-Starts to shake
-IPR % starts to raise
-Received no response from gas pedal (absolutely no power)
This truck has been torn apart like 8 times and I have to do it on my spare time.
View 13 Replies
I have a 06 f350 with 5.4 140k miles. Recently it has been shaking bad on idle but only in gear and it's hard to start when cold. The exhaust is moist at all times and the fluids never leak. When you floor it it hesitates feels like it's overly rich but if you let off a little it stars to pull again. Also while cruising at 1500-1700 rpms in any gear it will surge and skip. Only time it will miss and the CEL comes on is over 4000 rpms for a random misfire. Just put new coils in new fuel pump and filter. There has always been a cat code but it never effected the drivability. Could it be injectors?
View 3 Replies
Very strange things happening with 2009 F350 Gas, first the heater blower only is now working on high, progressively has gotten worse, low settings started not working a while ago, now only high works. Just recently the strangest thing, start the truck OK, turn on radio OK, turn lights on then the radio goes off. Will bring it to dealer in a day or two if I can't figure this one out.
View 3 Replies
2005 F350 Lariat ..... I cant get my AC to work in my truck.
AC will not cycle on, Originally thought the system was low because I jumped the pressure switch and it cycled fine (But did not cool inside the vehicle). Checked the pressure and it was in the 40lb range on the low side. My blower will only blow on high but I assumed it was a defective fan speed control.. Possibly an issue with the climate control?
View 12 Replies
I'm having an issue with my 2001 F350 V10. A seriously annoying high pitched whining noise appeared a while ago, then disappeared, and has now come back.
It happens as soon as I start my truck, whether it's cold or warmed up already. it increases in pitch and loudness as I increase RPM, it also does exactly the same in neutral. As soon as I put it in gear (R, D, 2, 1) it completely disappears and will come back as soon as I shift back to P or N. Strangely, if I drive around town for a few minutes, when I get back home and shift to park the sound doesn't really come back, sometimes it will be faint but usually it's totally gone. But if I shut the truck off and turn it right back on again then it's there again.
It's coming from somewhere in the engine compartment or close but due to the nature of the sound it's very difficult to locate. I got underneath using a screwdriver as a stethoscope and listened to the transmission, transfer case, starter, oil pan and even the gastank and it doesn't sound like it's coming directly from any of them. While underneath I noticed power steering fluid leaking from the pump behind the pulley and dripping off the hose. Somehow though I don't think it's related as the sound disappears in gear and doesn't change at all when turning the wheels. I cleaned the fluid off and drove around a bit and it doesn't seem to be leaking too badly and my reservoir is totally full.
The truck otherwise is driving as good as it always has and whatever this sound is doesn't seem to be having any effect on performance (yet...) ...
View 8 Replies
Bought a 08 F350 with the 6.4 Liter, with 80k mikes on it. Was traveling up an incline. Both Turbo's were engaged, when suddenly I lost boost, and PSI dropped all the way down. They barely create any pressure now. Checked intake, also checked boots too inter cooler. All seem fine. After driving it for about five minutes at low PSI, a check engine light came on. It was a sudden loss of power.
View 13 Replies
