Ford Super Duty (1999-2016) :: 2003 - Rough Idle And Low Power
May 12, 2014
I've got a 2003 6.0 that's got a rough idle and low power situation. Doesn't matter hot or cold it has a hard start issue but when it finally starts it has a rough idle, sometimes it has low power on take off but not always. FICM has 48.8 volts coming out, exhaust just had a new y-pipe (had a cracked bellow) absolutely no smoke coming out. When I drive it hard it's like a rocket no rough spots just did oil with filters and fuel filters, blue spring upgrade, and cleaned out the turbo.
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The 2003 F250 5.4 Superduty has no power and keeps stalling. If I floor the gas it just stalls. I've replaced the pcv valve and line, the fuel pump relay, the fuel pump, and cleaned the tank, changed out the gas, added Lucas, and it just won't run right. Desperate, and no codes are coming up...
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I have a 2000 F250, SuperCab, 5.4 triton, 100,000 miles. It's been a great truck - got it at 63,000 miles. Once engine warms up, it has rough idle, and shift rough. I can give it gas to RPMs up and it smooths out some but is low on power. If this was my 76 F150, I would guess the vacuum hose off the intake manifold to the transmission came loose.
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Last night, I left it running while unloading a trailer and come back to notice it was idling abnormal. I jumped in it and tried to move it and there was a noticeable loss of power. I unhooked the trailer and tried to get it home. I only made it 1/2 mile down the road when it started spitting and sputtering (surging ever now and then) to a level that it died completely. I was able to start it back and get it out of the road but had to be pulled into a drive. It got to a point it wouldn't start back at all.
Today it started up however still had a rough idle and really has no power to speak of. The more I messed with it the less power it seem to have.
I have searched the forums and tried these things:
1) Checked the oil and noticed it was on the low end of the operating range. I put some in it to put it back to normal.
2) Disconnected the ICP
3) Changed the crankshaft position sensor
4) I dumped the fuel bowl after it completely died (in case it had any water in the fuel bowl).
The fuel filter was just changed 2 weeks ago. The fuel pump seems to be operating correctly (or it at least refilled the bowl) and started again with a very rough idle.
It doesn't have a engine light on nor do I have anything to read any codes it may be showing.
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2005 250 5-speed total oil pressure loss ... At 110k mechanic diagnosed failing phasers from noise, rough idle, loss of power under 1k rpm. (Crew cab long box xl bought new for $25k)(first 100k were from carpenters (hard miles) so this truck is barebones and usefulness is much higher than cash value). Truck has 146k
All symptoms typically disappear over 1k rpm so I have limited idle time and manipulated engine speed to try and maintain 1000-1200 and all has been well for past 36k miles. Today noise (valve clatter?) persisted at all rpm and during a scramble to get off the highway all oil pressure was lost (I'm aware that pressure gauge on dash is not 100% reliable). After total pressure loss I cut engine and called tow truck. Out of curiosity, I actuated ignition and motor cranked maybe two rotations, and then appeared seized. After about 45 min waiting for tow I went back to disengage 4wd and take my rifles and skis out of truck. At this time I actuated ignition again and engine fired and ran as it had for past 36k miles. I drove about one mile constantly watching oil pressure gauge, then noise returned followed by instant drop from normal to 0 pressure (dash gauge) I immediately shut of engine.
I am a mechanical engineer, but not a mechanic. I am familiar with the cam phaser system and I understand that their operation is directly related to oil pressure. Today's temp was under 0'F. I have a very skilled mechanic who works for around 30-40% of cost of licensed shop and I know his skills to be on par.
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I just got an 03 6.0 and a few days ago it developed a rough idle, it takes a little longer to crank and idles fine for 30 seconds to a minute then the rough idle kicks in also I noticed when I drive it the low rpm range is a little choppy and when I come to a stop it goes a little below idle then resumes the rough idle issue. I had it die on the road a day prior to this after it lost complete power at a red light, it started to idle low so I tried to counteract with a little throttle and with the throttle all the way it did nothing, a few minutes it died on the road and took a few minutes to start back up I did a set of filters and it hasn't done it again but I still have the rough idle, I checked the icp sensor and wiring no oil so I cleaned it up a bit and it runs a little smoother.
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Here is this wonderful 5.4 's issue now, sometimes it will idle rough, sometimes it wont. sometimes it feels like it wants to stall, other times not. if im driving about 30mph up a hill around 1700 rpm, the engine feels like a bucking horse, it will kinda want to produce the power, but cant seem to find it till the trans drops to a lower gear. With this engine power loss is unacceptable because it came out of the factory with no power, i cant afford to loose more.
there is no check engine light. its been doing this on and off for a week. i dont drive it much, may 15 miles a day. i thought maybe it was bad gas , i had it sitting for a month, but since then ran almost 2 tanks of gas through it. Seems to act the worst when driving it, then letting it idle for 5 mins, then drive it again, that's when its very noticeable. no smoke from exhaust, no mixing of oil and anti freeze, plugs are a year old, filter is new.
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Alright, I have a 2002 f350 7.3 4x4 ext cab xlt with 300k miles. Bought in may 2016 with 260k miles and towards November started running rough and felt like a loss of power. Had a no start but a new gray cps fixed that issue. Running fine. About a week later started it up and it had a rough idle, felt like not all cylinders/injectors were working. Was "knocking" and a loss of power. I was in the army at the time and stationed in Georgia, took it to a local diesel shop in Georgia and they confirmed my icp sensor was bad and injector #1 , #5 #7 were bad. Work was busy and money was scarce so I left it as it is and was saving up to buy the new parts. Then one day approx a week after the visit to the shop, I started the truck up and it ran fine. No misfire no knock no rough idle, drove fine for about a month.
In December, I was on vacation in florida to see my parents, drove the truck down, ran fine. While on vacation one day in a Walmart parking lot the truck didn't start up. Couldn't fix any issues then so towed the truck to my parents house. Did more troubleshoot, replaced fuel filter, cps, ipr valve, icp sensor, glow plugs, glow plug relay, ebpv pedestal was replaced with a ebpv delete pedestal. All parts bought oem and/or from riffraff diesel. Still would not start up. So then I bought a refurbished IDM from eBay, oem and then the truck finally started up one day but running rough again like it used to, then it wouldn't start again. So then, I replaced the PCM with a reflashed/refurbished one off eBay and boom truck started up, still running rough but now it starts up every time.
Now, took all eight injectors out and replaced all the o rings. Cleaned them up and put them back in, truck still running rough. Injectors didn't appear damaged nor the wiring harness so now I bought three reman injectors from riffraff. And replaced those three bad injectors. One of them is not spitting oil out the oil spout on the injector.
My dad has worked on freightliner semi trucks for years and is fairly knowledgeable when it comes to diesels. However he did something very amateurish the other day. So two injectors were installed while we were still waiting on the third in the mail. He wanted to see how the engine reacts when that one bad injector was not in play, but instead of unplugging the injector under the valve cover, he cut the wire outside the valve cover to the injector. He stated it's not a big deal and he can solder the wires back together. But once he cut the wire, the truck sounded a lot stronger, still rough idle but definitely stronger. Before, you would be pedal to the floor and the truck barely moves forward but now the truck will lunge forward. A big difference in power.
Now today, third injector came, swapped them out and fired up truck. We didn't solder the wire yet just quick connect, same you would use to connect wires for a car stereo. The new injector was not spitting oil out the oil spout. Even at high rev and truck warmed up. Truck still runs better with that one injector unplugged.
Tomorrow we will troubleshoot if somehow there's wires that grounding out or burnt out somewhere but as of right now everything seems to be in order, the uvch are tight, and no signs of anything burnt.
Triple checked everything, still getting fuel pressure, still getting oil pressure what gives? I also replaced the MAP sensor. Fuel pump is fine, fuel gets to fuel bowl. The next thing I'm thinking is maybe the hpop but we have oil pressure so idk..
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We have replaced 4 fuel pumps on a row.
Voltage is good...even ran a fresh circuit.
Ran new supply lines
But, can't seem to understand the continued drop in pressure. It usually takes about a day of driving to crater after a new pump/filter is installed.
It never dies, just loses power and drops the truck to an idle. Funny thing...if I shut the truck off and turn it right back on...full power for a short period!
The truck is used on a ranch that has plenty of rough roads...thought inertia switch maybe but i believe that would stop fuel completely right?
I am totally stumped and so is the mechanic.
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My F53 motorhome has a rough idle and hard misfire but is not setting any codes. I've put new plugs in it and not change.
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V-10 running rough at idle, chugging. a problem has developed with my 2004 E-350 V- 10 after having a new fuel filter installed and the induction service done . Picked it up from a local shop and it was running rough after bringing it in when running great! I figured maybe it fouled a plug or something so I drove it home but it didn't improve so I brought it back and had new plugs installed. It is still running rough and wanting to almost stall when accelerating from a stop and the shop cant figure it out , not showing any codes.
I'm thinking maybe they caused some type of vacuum leak that is so far undetected. The killer is it came to the shop running great !!
No other problems with the vehicle, I drive it every day and have owned since new. 278,000 on it now and it has been the best vehicle I have ever owned.
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I recently purchased a 1999 6.8L. Runs great when cold but after warming up the idle gets rough. Truck has new plugs and coil packs and fuel filter. Checked the fuel pressure and the idle is right at 30 psi. I read that the good pressure range is 30 to 45 psi. Is 30 psi acceptable or should I replace fuel pump or regulator? Any next step to solving my idle woes.
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I am new to the v10 I only ever owned 7.3 this is my father truck it's a 99 with 200k on it. The problem is it will idle fine when cold but when it is warned up very ruff idle no codes and when I go back at the end of this week I will check the O2 sensor with AE but I really don't know much about it.
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We have a 2008 f250 super duty with the 5.4 triton well ever since I replaced the power steering pump its been running raggedly, it idles rough and when i get up to 50, 55, 60 the check engine light comes on i put a diagnostic reader on it and said something along the lines of ECU bank 1 an Bank 2. What that is and I've been a mechanic for almost 3 years.
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2006 F53 (motorhome) with 6.8L V10. Rcently noticed rough idle and midrange (under load) mis fire. Had codes on 2 coils. Replaced coils and put new spark plugs in. Did not improve and now detecting mild back fire.
Just completed compression test. 1=207psi, 2=200, 3=210, 4=190, 5=197, 6=200, 7=200, 8=170, 9=202, 10=208.
put some oil in #8 and retested at 225!
Other observations on #8. Engine has ticking noise chased with stethoscope to #8. THE new plug with 200miles, insulator going to electrode tip and everything inside combustion chamber is black. All 9 other plugs still look new out of box.
With the ticking noise I was suspecting valve but the compression test with oil jumped way up.
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2001 f250 v10 6.8l runs a little rough at idle, low rpm is ok between 1700 and 3000 rpm but around 3 it starts to shudder while driving let off gas get back on its fine, new plugs 1,000 miles ago has throttle body spacer and cold air intake, stock everything else..
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I have a 99 f250 5.4l 2v with 165000. just two weeks ago i went to start up the truck on a job site to take lunch and it was running really rough. I talked with a mechanic at my shop and he said that it sounded like the aic or that i needed plugs. I went and bought aic and plugs and installed them all in one day. I unhooked the battery before i did any work and have changed the coil packs about 3-4 months ago when it was jerking at highway speeds. I am at a loss.
Read so much on the site about could be this or that and cant afford to through money at it like the govt does. I replaced the ait(air intake temp sensor) and the ect(engine coolant sensor) after i got a code from oreillys that said p0113 which is high input on it. I have read it can be so many things and it seems to be running rich because i am getting about half of mileage i was getting before problem started. i need a fix soon as i must drive the truck to work everyday which is a 52 mile trip total.
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I have a 2002 F350 with a V10, this just started happening where at times the truck will turn over but won't run... after a few times of trying to start it I pull the key out let it sit for 5 seconds then put the key back in and runs perfect..... now at the gas station the other day it started but ran like it was on 4 cylinders... I turned it off and restarted it and runs perfect. Heading to Kansas next week to pick up my boat and don't need problems....
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2006 F53 (motorhome) with 6.8L V10. Rcently noticed rough idle and midrange (under load) mis fire. Had codes on 2 coils. Replaced coils and put new spark plugs in. Did not improve and now detecting mild back fire.
Just completed compression test. 1=207psi, 2=200, 3=210, 4=190, 5=197, 6=200, 7=200, 8=170, 9=202, 10=208.
put some oil in #8 and retested at 225!
Other observations on #8. Engine has ticking noise chased with stethoscope to #8. THE new plug with 200miles, insulator going to electrode tip and everything inside combustion chamber is black. All 9 other plugs still look new out of box.
With the ticking noise I was suspecting valve but the compression test with oil jumped way up.
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I have an 02 f250 V10 with a rough idle (90K Miles). It's not horrible but it's obviously not running perfect. Everything seems ok when I am up and driving, especially at freeway speeds. I recently noticed that if the truck is in park and I run the RPM's to 1500 or 2K and quickly let off the gas it will die. It never throws any codes. So far I have replaced the IAC Valve, fuel filter, O2 Sensors, PCV valve, cleaned the MAF sensor and replaced the air filter. Plugs and boots were replaced 5K miles ago. Fuel trim levels on both banks are running around -3.1 to positive 3.5 based on what the computer is telling me. Also according to the computer the vacuum sits steady around 25 at idle (+ or - .2). I don't have a manual vacuum gauge, just relying on the computer. I've also gone around to every plug and disconnected both the injector wire and the COP wire and they all seem to equally affect the idle as well as the fuel trim levels.
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2001 f350 v10, initial problem was when i came to stop at light it idled rough. I changed all plugs,injectors and COP, and bad connectors thereto. Changed the clock spring as well. Now the truck idles like crap at first start of of the day then run fine there after. Replaced IAC, TPS, Temp sensor. Condition getting worse and now the temp gauge does not work. I am thinking maybe CAT Converter loaded up?
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