Ford 7.3L Power Stroke (1999-2003) :: 2001 F550 - Surge Off Idle / No Power
Jan 7, 2017
I have 01 F550 6spd 4x4. sounds rhythmic, smooth at idle but just over 1200 is a pattern surge but doesn't sound like one cylinder, cel is off, ICP and pigtail changed as it was leaking , no change. From what I've read duty on ICP and IPR should be about same % I've included the codes I've gotten, I have the epc disconnected right now as I thought it was a wastegate issue, checking the ICP plug next,anything I've missed? It had a cyl 8 contribution at idle which I hear is common? Will changing CPS work with that one? Think it's a grey one. There's no water in bowl I replaced filter, since replaced ICP, pigtail, and bleeding fuel bowl and new filter the codes are gone but still misses, will be checking uvch, injector buzz test showed no faults. Old diesel guy said to flood with Stanadyne fuel treat?
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I just replaced all 8 injectors in my 01 F550 with remans from FFD. I have noticed a constant knock at idle but truck runs great. Blowby has no pressure behind it, truck does not smoke. Does this sound like a problem unrelated to an injector?
It did not make this noise before replacing the injectors
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2001, 7.3 sometimes surges slightly on takeoff ??
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Recently I have noticed that when on a tune other than stock I am getting a surge at idle - my RPMs drop to around 621-630 then shoot back up to 660-675. On my stock tune my RPMs stay around 640-667 and don't cause the surge (felt as a shimmy so to speak). Is there anything else that causes a similar symptom? I attribute it to tuning due to it only happening when running anything but stock but could be wrong.
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Ok, I have a early 99 F550 that had a tired engine when I bought it about four years ago, but I kept using it just dealt with the low power and blow by. But last winter I decided the truck deserved a complete overhaul. New cab, new transmission, overhaul the engine, and everything else that goes with. I tore the engine down to find out it was already a ford reman. Had the heads completely gone through, new pistons, new exhaust manifolds, new turbo, brand new injectors, new 4inch exhaust, new valve cover gaskets uvch harnesses and repair ends for harness side, and a new IDM.
Now with everything back together, the truck starts an idles fine but has absolutely no power driving it takes like a half a mile to get to 45mph. No check engine lights no smoke. I took it to ford they said only stored codes were for ebpv which I deleted out of turbo housing they recommended changing injectors. So i did no difference. They also said my hpop was about 1600 at idle. And said that's enough pressure. I did resistance readings on all wires between idm an valve covers.
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The last couple of days with the temps in the 50's, my 2000 F550 with a 7.3, will start normally and idle fine. When I try to drive it, I get less than a quarter mile and it just looses power and will die.
If I flutter the pedal, sometimes it will keep running, very poorly. And when it does this, it is putting out blue smoke. After it does this, it will run fine. Just like nothing is wrong.
What do I look for, or is this normal. I have had the truck since last October and this is the first time it has acted like this.
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My 2003 6.0 has started to surge at idle after driving for awhile. Like when I drive to work (30 min) and pull off the interstate the idle will bounce around at the stop sign (only jumping like ~100rpm). Does this sound like the ICP to you? I've replaced it once before and am wondering if it's time to do it again?
Also the truck will sometime be hard to start. And when I say hard to start I mean turn the key, let the GP cycle the turn to start and it just cranks. But as soon as I turn the key back off and cycle the plugs again it'll fire right up. It doesn't seem to matter if it's hot or cold. It's been doing it since I got the truck. It seemed to get better after the 1st ICP but didn't completely get fixed.
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Dad has a 01 one ton with the 7.3 and isn't real tech savvy so I'm posting for him. He is the original owner and has been complaining recently about the lack of power. Particularly the upper end. He is having to downshift way more often and where he used to not have to. And we've both noticed a very noticeable shake at idle. Not a vibration but a true shake. He changes the oil every 5000 on the dot and I've gone and changed the air and fuel filter and ran hose and see foam and royal purple injector cleaner through it with no results. Truck is all stock with 225000 on it.
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I just did an engine swap and have an odd noise that I was curious on where to start. It sounds like a buzz test on an injector at 2,250 rpm and gets louder as rpms increase but starts out very faint and get louder. Makes noise converter unlocked and locked in gear under load and free rev no load.
-2002 F550
-Fuel pressure is 60+ psi all the time
-Regulated return fuel system
-New injectors all AD
-Stock tune
-38R turbo
-New flexplate
-injector hold down tight
-new degas res
-new water pump.....
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I seem to not be catching a whole lot of luck lately. The rear end on my F550 has a bunch of play. Going reverse to drive it clunks pretty bad but no ujoints are bad. I can rotate the yoke by hand and hear clunking so i am guessing the ring and pinion are bad, at 100,000 miles. Seems like the rear ends should be more stout than that, certainly look it.
Where to find a source for reman third members since this one had a drop out? Most axle places won't touch it
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I was driving my bosses f550 with a 7.3, and while towing a loaded 40' flatbed of hay, it started bloing white smoke and lost all power and had almost no pedal feel. It wouldnt even go past 2500 RPM. Then, all of a sudden, it started billowing black, and BOOM backfired and shot flames out the exhaust. Then, I pulled over at a parts store and replaced the fuel filter, which worked for a while, but then it started blowing white smoke again. Once I limped it home and unhooked it, I took it out and let her rev a bit and it seemed to stop blowing smoke, but it still has less than the normal power it used to have. It has 226000 miles and is completely stock.
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Decided to try a new wheel to see if I can stop the surge during hill climbing with our 5er. Old wheel looked great with no dusting or nicks. New wheel sure has a whirl when it spools up, but sounds cool. Haven't pulled trailer since swap yet. Truck still only has 85k on the clock.
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I have a 2001 f350 4x4 edge programmer 330k miles. I bought it not running right and thought it would be a easy fix. I'm fairly knowledgeable with the 7.3. Original symptoms where it would run for 5-10 minutes lose power and quit. No restart until it sat for a few hours. P1211 was code, so I figure it's a high pressure oil problem. The truck has a new icp, Ipr, fuel pump, a receipt from dealer where they replaced 1 injectors o ring. I figure the o rings where bad. I replaced all of them.
1 injector was pretty bad the o ring was kinda tore up and disfigured, and 1 had new o rings. Why they would just replace 1 I'll never know. Well the problem still exists, it starts fine sounds good. It will idle 20-30 minutes then get sluggish if I give it any fuel. It's a lot better than before I can floor it and it will rev up and after a few revs it gets better again. If I unplug the icp the idle will go up and down and almost die. Trying to start warm it will just barely run at 4-500 rpm then quit unless I can get it to rev. Once it revs up it seems ok. Does that sound like a hpop problem or am I even on. The right path?
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Just joined today, I have a 2003 550 7.3. New HPOP, 3 new injectors, new seals on others, new fuel pressure regulator, new fuel pump, sending unit mod to eliminate filters. 733 HPOP pressure, 65 fuel pressure at idle. Truck runs out of fuel pressure after its warmed up and driven about 20 miles. Haven't checked voltage at pump while driving. I had taken it to a seasoned tech of 20 years and he had replaced HPOP and 2 injectors and it does start better but problem is still there.
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Having trouble with motor, driving home one day heard a noise under the hood. Then a lot of grey smoke started coming out of exhaust. Got the truck hauled home notice fuel was coming out at the number 7 cylinder at exhaust port. Thought it might be the injector just put rebuilt ones in, thought I might have received a bad one. I switch the number 7 injector with the number 3 injector. Did not make a difference still have fuel leaking out of exhaust manifold at the number 7 cylinder and a lot of grey smoke coming out of exhaust. Not sure where to start looking next? Could it be the injector cup is the problem?
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I change my motor in my 01 f350 ccsb to a forged rod one from a 97. When I put the thing in my inexperience cause me to screw up my torque converter in turn ruining my transmission. So after a rebuild I put it back in and she fit like a glove. Ever since I put the engine in i get a vibration at idle.
After I realize I screwed up the torque converter I figured that was the cause of the vibration. But now I know the trans is in properly I still have this vibration I'm thinking it's the position of the motor. I installed new motor mounts when I put the motor in but they were quite a bit off from the original points on the cross member.
My only idea to rectify this was to reinstall the original ones and try to position the motor back where it was prior to the engine swap. Or should I be looking elsewhere?
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A couple weeks ago my 01 7.3 with 265,xxx started ideling rough and stalling. I had driven in all day Sunday and the next day it started out of the blue! It would barely start idle rough and stall out no CEL. I have singed changed the icp, fuel filter and I have checked oil level. Also used fuel cleaner. Still had no luck. When I changed the icp sensor the check engine light came on and was no change I then got a ford oem camshaft sensor and my truck fired right up but still sounded like it had a little miss here and there drove it for a few weeks fine now back to the same thing it will start up and idle fine for 10 seconds then start the rough idle but won't stall out anymore just idle rough. I am stumped I can't get any codes to pull up and if oriellys uses there scan tool while the truck was running it would shut the truck off! I can't find any answers.
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I have now replaced hpop, injectors, cups, gpr, batteries, uvch on both sides, icp and ipr on my 2002 F550 and it still has a long crank to start.
It has been driven about 1,000 miles since then and no change. I have no codes except buzz test produced a high to low 1272 1274 1276 1278 one time. Cannot get that to happen again.
It is taking 4 seconds of cranking to start consistently hot or cold. It always starts but cranks for what seems like too long compared to my other 7.3s. I have included a screenshot of the data and am curious on what everyone's thoughts are as I am out of things to look at!
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Ok I'm working on a 2000 7.3 on a F550 truck was running but had no power so we changed out all the injectors and glow plugs and rebuilt the turbo now there is no start it turns over and were getting black smoke from the tail pipe. What is going on with it?
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2001 F250 7.3L 280k... On a 50 ish degree day or if the truck is cool on a warmer day I'm getting an inconsistent idle lowest end 450rpm high end maybe 750. Wondering now what the possible causes may be, truck seems to run fine and idle ok once warmed up but still cycles the revs a little, AC is off.
Second question is about an oil leak, doesn't seem to be massive but it leaves a small pool, especially if she's plugged in. It seems to be coming from underneath the truck driver side large metal tube system running front to back on the engine, just under the manifold I think.
I checked HPOP connections and they are solid no leaking but here's a pic from under the truck, can't see any of this from the top. Is it an easy fix??
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I'm looking at a 2001 Excursion with 242k miles. Truck is all stock, and everything checks out well. The only thing is there is a slight vibration at idle, that increases quite a bit when the engine is revved to about 12-1500rpm. Ran a CCT, and #8 was flagged. I know that can be somewhat normal depending on the CPS, right? Otherwise the truck is smooth, and in great shape. Should I be concerned about what feels like a slight miss on #8?
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