Ford F-150 (2004-2008) :: Engine Missing Out At 50 MPH
Mar 27, 2013
I have a Ford F150 5.4L lariat 2 wheel drive with 78,000 miles on it. I just had new platinum plugs put in and a new air filter along with the routine LOF service. I had the plugs changed because I was experiencing some missing out at 50 MPH. The check engine light was not on. The mechanic said that one plug was definitely bad.
I have had the truck back for a week now and today while driving it I had the same missing out at 50MPH. The check engine light is not on. I had the cruise control on when it happened so now I am wondering if it could be related to the cruise control? What else It could be?
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My dad is looking at a 2005 F150 2wd with the 4.6L V8 that a friend of his has. Its a 2wd XL, but has the cloth seats, the interior and body are excellent conditions. Its high mileage however, (210K), but the engine sounds good, but it has a miss and the check engine light is on. He took it about 6 months ago and had the oil changed, new belts and spark plugs, drove it very little and its been setting for sale for about 3 months.
When dad started it this evening, the engine was missing and the CEL light is on. His friend suggested he drive the truck for as long as he likes, (which he did today and he does like it) but I advised my dad to take it to a mechanic and have it checked out first, maybe even the dealer to have it checked out to be safe.... which he did today. He took it to a local Ford dealer today to get them to check it out they stated that it was a coil pack that is bad on the #2 cylinder.
They (dealer) also told him a bunch of other things that was "wrong" with it, but I think a lot of it was lies just to get him to get it fixed there and make money off of him. They said it needed an intake gasket (said it was leaking a little bit), they also said, battery and cables need to be cleaned, tranny service, coolant flush, etc, etc, etc.
Once outside the guy (tech) was bringing the truck out and my dad asked him the about that intake gasket and he acted like as if the dealer makes them act like things are a big deal, or saying they may not always need what they say. He told dad alot of those 4.6L's did that and it was really nothing to be concerned about, but I don't know.
I have a 95 Town Car with the 4.6L and am familiar with these cars, but I guess the 4.6L in these F150s are different beasts. I do know the plastic intakes on the 96+ models were issues.
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My 06 f150 5.4 3v has developed this miss in the last 1000 miles which is very annoying and fuel consuming. Its most noticeable at idle where the engine quivers and at highway rpms where it will start to vibrate when being slightly worked. I have already changed the cops and plugs, and there are no codes coming up.
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I just did my plugs in my 04 F150 5.4 The truck had a really bad miss, and I figured it was time for plugs. I broke all eight plugs which I expected as the plugs were in there since new and had 120 000 miles on them. Replaced with champion double platinum and I am not certain that was the best idea.
The truck is much better with the new plugs but still has a miss and a rough vibration. The truck seems to shake side to side at idle but smooths out during normal driving conditions. I have noticed that it seems to lack power intermittently if that makes any sense. Also, the check engine light was on for a while but I tracked that down to a broken wire in the evap system.
So I am thinking first step is to verify that the coils and boots were installed correctly. I have to see if we have the scope module for the Genisys at work. I am going to check for vacuum leaks as well. I just changed the fuel filter and no change. Is there anything else I should look at? Would cam phasers cause a rough idle and intermittent loss of power?
I don't drive this truck every day so I can take it apart to diagnose it further...
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I have a 2005 FX4 with a 5.4L. I have noticed in the past 3 months that when I mash the go pedal hard the engine misses and there is a popping sound. My gas mileage has gone down 2-3 MPG.
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I bought 04 Lariat (5.4 3v around 100k miles, Roush Off Road side exit exhaust, DWV intake mod, SCT 3015 tuner).
The truck has had a miss on and off for around a month I've changed plugs and tested all the coils. Which cured the problem for around a week, the FPDM had some white stuff on back and soft spot but not ate through. The only Check Engine Lights have been bank 1 to lean (which went away as soon as it came. But yesterday and today I've got bank 2 to lean.
Below is a quick data log pull... The misses is about ready to ship her out if she don't straighten up..
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Yesterday driving to work felt the engine missing, on the way home got a CEL pulled the code when I got home it was P0302, so I started with the easy and put a new coil pack, same issue, so I prayed and pulled the plug (it didn't break). Put a new plug and a second new coil pack (just to be sure, and yes I keep extras dang 5.4). cleared codes and started it this time got P0202 Ford - Injector Circuit Malfunction Cylinder 2, so I checked Ohms on #2 and it was 12.6, #1, 3, 5,6 all have 13 Ohms, didn't check #4, 7, or 8 because my big hands and the probes on my multi meter. Checked the wires on all of them and have 12 volts with key on, not running. I read another check to put blk in pin and red on pos batt terminal, and that it was supposed to go 12 to 0 off and on with engine running, All of mine went up to 14 volts and stayed no switching. Is there something I am missing to check before replacing the injector on #2?
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My 2007 5.4 Triton developed a miss. Code came up knock sensor at first. Changed knock sensor, did plugs, and coil packs. When we did the plugs, I was in town, and all of a sudden the truck just went crazy and started running like total crap. Was smooth up until this point. Spent three days trying to figure it out, and turns out one of the plugs went bad. Had to drive it like that back to the shop, and to work a couple times if that might have caused another problem. After that was fixed it ran like a champ.
Put Accel coil packs on. I had a sulfur/gassy smell coming through the air vents, and it progressively got worse, and the truck started missing again. I put the stock coil packs back on and the smell went away, and the previous miss was back, but wasn't as bad as the Accels. Brought the Accels back and ordered a set online, and installed them. Fixed the miss for about a week. Now it's back, and really prevalent at about 1100 RPMs. I swapped each coil pack today with a good one, and no change, so I don't think it's coil packs. I'm so confused and bummed over this... is it cam phasers? The truck is at 91k miles...
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I've developed a miss no codes mild at idle horrible at 70 mph 2100 rpms driven me nuts cant figure it out cops are good just put in new plugs & gonna swap them out for a new set they were motorcraft. Sprayed water on lines & intake looking for vacuum leaks but no change....
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Have 146k on an 05 SuperCrew, 4.6 V8, it's like my right arm! Don't know what I'd do without it. The other night, at interstate speed, something "popped" and the check engine light came on and it started missing. Left it at the mechanic's overnight, he swapped coil packs with no change, pulled the #6 plug and found it wet with antifreeze. No water in oil, no overheating, no other signs of head or gasket failure.......I'm tempted to put some stop-leak in it and change the plug.......
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I had a loud whine from the rear axle of my 04 SCREW and had the bearings replaced at the dealership. It has been about a year/12k miles since it was done and I just noticed that the vent hose is missing. I'm not sure if they left it off or if it fell off on its own. Anyway, my question is, do I need to replace the fluid once I put a new hose on? I'm not sure how much if any dirt or water might have gotten in there. Also, where does the hose go up to? I figure it must clip to the frame somewhere.
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I have a 2008 XL 4.2 auto trans with 60,000 miles on it. We purchased a new travel trailer with a total weight just under 5000 lbs that we pulled for about 2000 miles this summer. On the last trip we noticed the truck was missing pretty bad going up hills or under load. After we got home I started to notice the miss at times even not towing. Did a tune up with Motocraft plus and wires and seems to still have a miss at an idle and very low RPM. What would be best to check next?? Would Coil be logical?
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2007 F-150 4x4 reg cab
Trying to get my trailer plug to work. Don't have a owners manual. Looked in fuse box, fuses 104 , 114 , 107 and 118 are missing?
Need to know what they are? Also look for fuse numbers that have anything to do with trailer plug.
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I changed my spark plugs now I got a miss and rough idle .#2 and 6 seem to be the ones that miss the idle don't change when I unplug the coil , I take coil off and put it next to the motor it sparks ! I put everything 3 plugs and got about 200 miles on them and 3 out of 8 had melt downs and left me on the side of the hwy. I got autolights in it now but it got a miss and rough idle ! Did I not do something right ?
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My truck trailer connection has no power to the + pin, called the Trailer Tow Battery Charge. I traced back to the fuses and relays and discovered the relay missing. Unbelievably Ford is having a hard time with this relay. They don't seem to be sure which one it is. My owner's manual says it is a Full ISO relay. But Ford doesn't like that description.
What can I use there? Is there any after market relay available that would fit. Napa said they don't have anything listed, and O'Reilly and Autozone look at me with a stupid expression. I also need one for the starter relay. Mine was replaced with a anti theft device that has a remote control. I want that removed so I need the realy.
All the relays appear to be the same. I plugged in the blower motor relay in the trailer tow charge position and got power to the + pin. But I need the blower motor. The Ford guy said that it might be the right one, but he couldn't be certain and if I plug it in and it doesn't work it's my loss.
This is for the 2006 F-150, 4.6l truck.
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My 07 xlt 4x2 4.6 (49700 miles) started missing a couple of weeks ago. Did it for 2 days, the Check Engine light came on, then it quit missing and ran normal. CE light was still on, so I had the code read and reset light. Got two codes: ignition missfire #8, and rich fuel. I assume the rich fuel was caused by raw gas in the exhaust.
Anyway, the truck ran fine for two or three days then started missing again. Checked #8 by taking the wiring connector off #8 COP - rough idle unchanged. Pulled COP off #8 and #7 and swapped. Rough idle unchanged and confirmed miss was still #8 by pulling COP connector. With #8 connected, disconnected #7 (with COP from 8) idle was significantly worse.
Replaced #8 plug. Same miss. What to check next?
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I recently purchased my first Ford pickup. I bought a 2006 F-150 with the 5.4L 3V engine. I have only driven it for about 300 miles so far and am having problems. The engine has 146,000 miles on it. I have read several posts on here about the cam phasers which I believe that I may have some issues with. The engine will run well when cold, on the road, etc. The engine does have a slight ticking after it warms up (cam phasers?). When I come to a stop after the engine is operating temperature, the engine will start to miss and shudder and all 4 above codes come active and are also pending (8 codes in total).
All 4 codes are logged at the same time. I have replaced both cam position sensors, both sensor ends and terminals for cam position sensors, checked wiring around the rear of engine (does not appear to be rubbed through), all plugs were replaced, and all COP boots are good. Is there anything that can cause these codes that may not be the actual cam position sensors, ie. VTC, COPs, cam phasers? What pins the cam position sensors come on the ECU (so I can ohm the entire wire harness)?
Also, if the engine is missing with the codes active and I rev the engine up it will come back to idle and run great. The engine never dies out, just runs horribly. I have also unplugged each sensor with the engine running which has no effect on the way it runs.
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2008 Prius with Nav/GPS system and 6-CD audio system. Around 30K miles, Bluetooth failed, and the Telephone Icon no longer appears on the Info Menu. Service Menu shows no version number for Bluetooth software, suggesting it somehow was deleted. Two local Toyota dealers don't know how to fix it. Toyota Customer Service gave wrong instructions: to eject the map data DVD and then reinsert it to reboot the system. That did not correct the problem because the map data DVD has only map data, not Bluetooth. Is there an internal hard drive on the center console unit that holds the software for Climate, Audio, Display, GPS, and Bluetooth? There must be. I need instructions on how to (a) reload the software, or (b) reboot the system to get software to reload. One local dealer said I had to replace the entire unit. That's like buying a new laptop because someone deleted Skype.
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My recently acquired 2009 GX 470 has the passenger side engine cover missing. It is also missing the rubber plug for the tow hitch.
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2008 GX470..... Car died 3 times on the way...engine started missing a bit then completely died. First time n of Dalhart TX pulled off the road and restarted in a few minutes ran ok for about 30 miles died again. Restarted in a few minutes, filled up and drove 120 miles to Trinidad CO no problems....stopped at Toyota dealer in Trinidad, ran full diagnostics, said fuel mixture would run too high, car was fine now, maybe bad gas. Drove 150 mi no problem to Co Springs. Car died again climbing up to Breckenridge, pulled into gas station, shut down, filled up, restarted and no problems the last 100 miles into Breckenridge? Only commonality when the car died was that I was at half tank of gas. If fuel pump issue should full analysis have showed that?
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During a hard acceleration to get on the freeway, the car "missed" and the check engine light came on. The shop said it was the fuel pump and replaced it. When I picked it up, they told me that I may need a new battery soon because the last start they did was hard. It worked well for me, but that day it was hard to start, but it did not seem like the battery. The shop checked the electrical system and all was good. They said the new fuel pump was faulty and replaced it. Since then, when it is over 70 degrees out (South Texas), and it is a hot start (I just drove it a while, turned it off, and try to restart within 30 minutes), it is hard to start. Could this be another faulty fuel pump? Is this some other problem? Could the shop have damaged something during the fuel pump replacement?
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