Ford F-150 (2004-2008) :: 2006 5.4L Idling Very Rough And Had A Terrible Miss Around 1200 RPM
Oct 3, 2011
I have a 2005 5.4 F-150. First off it came to me on a rollback because the owner tried to replace his plugs after he noticed it missing and of course broke one off. So after I extracted the plug from #8 cylinder and installed a new plug I cranked the truck and it was idling very rough and had a terrible miss around 1200rpm. I pulled the codes and got several misfire codes and ignition coil faults on #5,6 and 7 cylinder. Popped in 3 known good coils in these 3 cylinders with no difference.
On Mode 6 on my diagnostic software you could watch the misfire count steadily increase on #7 and every now and then there would be a single misfire on #5 and 6. It also had several codes for O2 sensors biased, stuck rich on that bank. Well since it had a brand new plug and coil, I popped an injector in #7 and havent had a single misfire on it since and it also started idling alot better and all the O2 codes went away. The problem I am having now is #5, 6 and now 8 will randomly misfire, sometimes build up a steady count on one of them, sometimes just skip around between them.
The truck has brand new plugs in all 8 and new coils on this bank also. The truck has 115,000 on it and does have some cam phaser noise on the bank causing the problem, but its not too terribly bad, I have heard alot worse. My problem is something on that bank only as the passenger side bank is fine. I am wanting to say cam phaser now since this is the side with the noise. I have changed them before but have just experienced the noise, never one running like this because of it. Possibly jumped time a little?
View 14 Replies
Advertisement
My brother's 5.4 has been rough idling and dying at stops and in reverse for a few weeks now. Today it threw a code and he finally had me look at it and it's a P0345 code. I was thinking cam phasers possibly, but I didn't think that would cause a code to throw. Also, all I hear about cam phasers is that it makes the truck sound like a diesel, but his when it's about to die sounds like the engine is about to drop out the bottom of the engine bay. Really rough, REALLY loud knocking, etc... What we should be looking at replacing to get this thing back into shape?
View 3 Replies
2005 f150 5.4.
I have a slightly rough idle and can feel a miss at 1600 to 2000 RPM. Sometimes running about 65 MPH up a slight grade I can slowly press the gas pedal and the engine will begin to miss much worse, causing the truck to shake pretty bad. When it gets this bad it will slowly flash the CEL and I get a P0306 code (Cyl 6 missfire).
The truck has 148000 Miles on it and the plugs were replaced at approx 120000 by the dealer.
In the last week I have replaced the plug in cylinder 6 (looked ok) and have replaced all the COP's along with the fuel filter and the injector on #6.
I haven't been able to get it flash the CEL light or throw a code since replacing the COPs though and I am at a loss at to what to try next.
View 2 Replies
My truck is idling terribly and knocks while doing so, little info is
The truck has 170k miles, I just bought it about two months ago and it was running perfect, drove it to the beach two or three times (4 hour drive) no problems whatsoever. Two weeks ago I noticed it start rocking a bit at idle ONLY when warm, check engine light came on so I ran the code and it said the Cam shaft positioning sensor was bad so I replaced both of those, then the next code I got was for the vct solenoids, replaced both of those and the problem is still persisting. It is odd to me in the fact that when its cold, it runs flawlessly, no problem accelerating/idling/maintaining speed/smoke nothing at all.
As soon as it gets warm it will still do everything flawlessly EXCEPT idle. the idle rpm is around 300-400 and it rocks and knocks terribly.. If i am stopped and I apply some throttle in park or nuetral, just enough to get the rpm up to around 800-900, its perfectly fine. no more rocking no more knocking but as soon as i let my foot off the gas it goes right back to feeling like its going to fly out from underneath the hood.
So my question is why is this? What on earth is going on here? and how do I fix it? And why is there not a manual idle control. Ford place said there was likely damage to the head and recommended a full engine replacement.
View 2 Replies
We've got a 2006 F150 with a 5.4 in it. One of the new kids was told to change the spark plugs, then when I went to start the truck the next day it was missing bad. Plugged in the Ford IDS, number 7 cylinder is dead. Only codes are for that cylinder misfire, and random miss on startup. So, I double checked the kids work and it was all fine. Tried putting a new plug in, didn't work. Moved the coil to a different cylinder to see if the miss would jump, stayed on number 7.
Used a noid light to verify COP harness was working, and it was. Put a new coil on it anyway since I had one, still missing. Used noid light to verify signal going to injector for the cylinder. Signal was good, replaced the injector for the cylinder. Still misfiring. Ran a compression test and the cylinder has good compression. The threads for the plug are fine, not cross threaded or torn out. The only thing I can think is that the PCM has gone bad in a way that its firing the injector/COP, but doing so at the wrong time some how.
Every other cylinder is running fine, O2 sensors fine. PCM isn't trimming anything back to account for anything, and if it was it would do it to multiple cylinders to keep the engine balanced. Cant think of any more tests, and I don't believe there is anyway that the airflow could be restricted to only 1 cylinder, but I could be wrong. Wanna try and solve this to keep from sending it to the dealer.
View 6 Replies
I have a 2007 F-150. Here is the story....
Last summer the truck was idling rough and seemed to be stumbling a bit. Took it to the dealership and had it diagnosed. Had a mis-fire code on cylinders 1 and 3. I was told to do the spark plugs and clean the MAF. After replacing all plugs and cleaning the MAF the truck seemed to run better but it didnt last long before it started doing the same thing. My Edge Evolution started showing misfire codes in cylinders 1 and 3 again and the truck is stumbling like crazy. Here is what i have done:
1. Swapped the plugs from cyl. 1 and 3 with cyl. 5 and 7 and the problem followed.
2. I replaced the bad plugs with new ones and i no longer get a code for those cylinders but the truck is still acting the same.
Now I am getting two codes saying the system is running rich on bank 1 and 2 and a misfire code in cylinder 4. I cleaned the K&N filter and replaced the MAF but it is still the same. The truck stumbles horribly under a load and has NO power.
History:
2007 F-150 5.4L Lariat
75K miles +/-
K&N Filter
Edge Evolution (has been kept in stock mode)
new spark plugs last summer
new MAF (this week)
New Fuel filter (two summers ago)
View 5 Replies
I have a 2007 F150 XLT, Supercab 6.5' bed, 4x4 5.4 Automatic with 67000 miles on it. Its not a Flex Fuel
Over the past couple of weeks it would get go through random rough idling spell or stall going down the road. If it was sitting it would idle clear down to 200 RPM's and just sound like an old 'chitty-chitty-bang-bang' car, not a modern marvel of Ford engineering!
I noticed it particularly does it this on an incline. Initially I fixed it by just coasting to where it was flat. I normally keep it above half a tank so i dont think its a fuel pump not getting fed. So I replaced the fuel filter yesterday hoping it was full or clogged, no changed.
This morning it would start at all, I removed the negative terminal on the battery, rolled to the level, tried it 30 times. Nothing. I checked all of my connectors under the hood and the 2 below the cab under the plastic cover. Everything was connected. I disconnected the fuel pressure sensor and it fired right up and runs smoother than since I've owned it.
It hasn't had any CEL lights, until I disconnected that sensor. Should I drop the tank and clean it? Is there any special gasket kits or connectors I should be aware of? Should I just replace that sensor? Is it connected with a chain of sensors I should check first?
View 2 Replies
I am having a problem with my 2006 Saab 9-3 Aero Combi Wagon w/130k miles. When idling, driving up hills, and accelerating to pass, the engine seems to miss multiple cylinders. I've had all spark plugs replaced within the last year, and all the cylinder coils were checked after bringing the car in for this problem (one was replaced). I took the car in yesterday to address this problem and the mechanic stated that he didn't know what to do. The check engine light is on, and the mechanic told me that the readout states that their might have been a problem with the gas cap, but they checked it out and it looked sound. Could this be a fuel pressure problem? spark plug wires?
View 5 Replies
I have a 2004 Cadillac it started to miss when your idling, a check engine light when on and it was #5 plug not firing so I changed the plugs in front 4 of them and also bought a coil pack and replaced that, but it still misses. What else can I check before thinking its a sticky Valve or internal engine problems.
View 6 Replies
My 1997 f150 5.4 has started an idle issue. The truck when started will idle around1200 rpm and not settle down After driving a bit it will drop down around 800 and idle rough and sounds like it has a plug fouled. As soon as you give it gas it clears up and sounds fine, then drops down an idles rough.
Checked for vacuum leaks but don't see any. pulled the MAP sensor and cleaned it, but did not change.
View 7 Replies
I have a 2006 f150 I just bought after my F250 was stolen. It has about 70k miles. It has been running pretty rough ever since I got it. It finally threw codes so I tried to address all the issues. Changed out a couple coils and all the plugs (motorcraft platinum). The camshaft sensor was also bad. Truck runs much better but still has an idle issue I cant seem to nail down.
I assume its something to do with air intake. It doesnt happen all the time. It runs rough and knocks and sometimes dies. If I give it gas it stops. I read it could be the idle air intake valve, but then I read that this model doesnt have one. I also read that air intake issues dont normally throw codes. Are there any common problems I could look for? Would cleaning the throttle body do any good?
I know the basics, but this kind of thing is tough for me to troubleshoot. You may have already seen me post this problem, but I didnt get much response so I thought I'd try one last time.
View 11 Replies
My truck starts to miss between forty and fifty mph. When you get on the gas pedal it won't do it but when you are slowly increasing speed it will start missing or maybe you can describe it as bucking. Above fifty and below the truck runs fine.
View 9 Replies
History: Truck was running okay but acted like a coil was bad when under load. I changed out all the plugs with Motorcraft and put on Summit racing COPs.
After the plug and cop change the truck will run rough after it is warmed up. I changed back to the old COPs and it runs the same.
First I replaced the MAF sensor after finding many posts on here about it. No change.
I read a bunch of posts on oil causing the problem so I used 10-30w and nothing changed.
I searched for a vacuum leak with carb cleaner and couldn't find one. I removed, cleaned and reinstalled the throttle body.
When I did the plug change I disconnected the PCM without disconnecting the battery. Would this cause this type of problem?
I think this is about all the stuff I found to try in the threads that came up through searching.
View 13 Replies
I just received a 06 F150xl with a 5.4 triton and idles rough with the following codes! p0357 p0012 p0340 p0344 p0351 p0352 p0356 p0358 p0357 p0102 p0113 p0353 p0354 p0355 It's amazing the truck even runs and with no light on but it will accelerate. someone mentioned to clear the codes and drive it 50miles or so and read them again.
View 9 Replies
I have a 2004 150 with 165,000 miles I sometimes pull a 5 by 8 trailer. when pulling trailer in overdrive and excelorating the engone will cough several times. I took it to a mechanic and he told me that there was nothing he could do that I needed a new engine. I can pull trailer out of overdrive with no problem. don't undrstand why I need new engine....
View 3 Replies
I have a Ford F150 XLT. I have 67000 miles on it and the other night it just started running rough out of no where near idle. Once you got over 20mph the rough running would go away. I took it to get an engine change and engine flushed but it came back. It doesnt always run rough near idle or below 20mph. The Ford dealer says my engine has only 22 psi oil pressure near hot idle and cant engage the VCT phazers and they want to replace the whole engine.
View 1 Replies
I just bought an 2006 f150 4x4 with a 5.4l 3valve, and this morning when I pulled into work it was idling Rough as I let off the gas and rolled into my parking spot. No check engine light or nothing, just when it's in gear Rpm is at 600-700 and vibrating. When I shifted it into neutral or park it went away and the engine ran smooth. According to the oil pressure gauge I've got good flow. I was told from the dealer that they replaced the cam phasers, timing chain and put new spark plugs in it. What the issue is here?
View 1 Replies
Ok new issue that started yesterday only get it at idle. Runs great above idle no real power loss or change in fuel econ. Haven't really had a chance to test much. I was thinking maybe a injector issue but I don't know
View 14 Replies
My 1999 BMW 3 series, with 112K, full synthetic oil and a 5 speed transmission does great, except for one minor issue. About once a week, when the motor is warm, it dies. Tonight after driving it about 20 minutes on the highway I came to our hill, put it in 1st gear to come up (like always), and then came to the flat part where I put it in neutral to coast the few feet into our driveway. The car responded by idling up to about 1200 RPM, and then dying. It always starts right up the 1st time (even after sitting for 2 weeks), and it is absolutely otherwise reliable. My initial thoughts were something with the idle control valve?
View 1 Replies
I bought a 04 FX-4 a couple months ago with 102k on it. Brought it back to selling dealer, they replaced #1/#6 coils, its ran great till this past week. Again it has stumbled a couple times this week. It only seems to have the miss at idle (comes and goes) take off from light, within 50 feet its running like a champ again. I cleared the codes (disconnect battery)and now it seems my idle is not steady, it fluctuates. Is the idle a product of the codes?
View 2 Replies
My sons 04 f150 started to miss then quit on him then wouldn't start so he had a buddy pull it to a neighbors I went to check it out an hr later the first time i tried to start it it started ran for 2 sec then quit tried again and it would just crank no start went back 3 hrs later with my code reader no codes but he did say check eng was on when it quit first time so i try starting started up so i headed for home, it started running rough twice on way home but seem to come out of it both times.
View 1 Replies
