Ford F-150 - 1997-2003 :: Misfire In Cylinders 1 And 8 Mostly In 50 - 60 Mph Range
I started out with misfires in cylinders 1 and 7. Replaced all spark plugs (used autolites, i know i know). While replacing them I found that the boot on coil 8 was beat up with a chunk missing. It was working before I replaced plugs. After I changed everything out the 8th quit working completely and I still had a miss in cylinder 1.
Replaced coils on both of those and put a new wire connector on for 8th cylinder because it no longer clicked in correctly anymore. Truck runs infinitely better than it did prior to this, but according to OBD2 I still have misfires in 1 and 8.
Mostly in the 50-60mph range. What else could be causing this??? Injector maybe or is there some other sensor or timing problem? My dad has a compression test kit, but he lives several hours away so I can't just get to that right away.
Ford F-150 - 1997-2003 :: Error Codes - Misfire Detected On Cylinders 2 / 5 And 6
My wife and I received her father's 2002 F150 4.2 5 speed 2 wheel drive truck after his passing. He purchased new plug wires and wanted to replace them. So, this weekend I put in new plugs, plug wires, changed the air filter, and changed the oil and filter. Started up and ran really rough. Threw my code reader on after taking it around the block and found the following codes...
P0316 Misfire detected in first 1000 revs,
P0302 Cylinder 2 misfire,
P0305 Cylinder 5 misfire,
P0306 Cylinder 6 misfire.
New plugs were Motorcraft plugs, but had skinnier center compared to the ones that came out of truck.
Where do I start? What do I do? I am really confused as I have changed plugs and wires before and always had vehicle run better or same as before change.
Ford F-150 - 1997-2003 :: Stumbling A Lot - Throwing Misfire Codes On 1 / 8 / 4 And 3 Cylinders
Recently bought 98 f150 xlt 3 door 5speed 4x4 4.6l 230k miles for $1k was throwing misfire codes on 1,8,4,3 cylinders. Usually throws two cylinders at a time and never the same cylinders consecutively
Parts replaced:
coils...msd blaster
belden wire
motorcraft plugs...when i did these it ran perfect for a tank of fuel...18mpg no stumble
two cans seafoam through the tank
tank was dropped and drained
fuel filter
one can seafoam intake cleaner
3" exhaust from the Y pipe back
MAF cleaned
Previous owner said to have tested and cleaned injectors but I am not positive it was done... I don't think its mechanical because it wanders through the cylinders and when i changed the plugs it ran spot on. it gets worse the warmer the truck gets also.
injectors?
clogged small cats?
sensor?
Ford F-150 - 1997-2003 :: 2002 F150 5.4 - CEL Came On For Code P0174 - Misfire On 7 Of 8 Cylinders
So the past few weeks my truck has been sputtering a lot. It seems to do it more so in low RPMS but when I lay on the throttle I didn't really notice it. I haven't had time to look into the issue but yesterday the issue got drastically worse and the CEL finally came on. Registered P0174 as well as a number of other codes including misfires on 7 of the 8 cylinders.
So far I have replaced the fuel filter. Spark plugs are only a few months old. I didnt think it would make sense for all of the coil packs to go out at once so I was thinking either a fuel issue or vacuum leak. Why would it only spit out P0174 (Banks 2) and not show P0171 (Banks 1) along with it? Fuel pump? Vacuum leak? Where should I start? 2002 F150 5.4L...
Ford F-150 - 1997-2003 :: 2002 Truck Running On 3 Cylinders
My aunt recently gave me her 02 f150 for free because it got flooded and she didnt want to fool with it. she said it ran great before it got flooded. I flushed everything. oil, gas, and tranny. I blew water out the cylinders and replaced the spark plugs. I took the fuel injectors out and cleaned and cycled some b12 threw them. The truck starts and gets spark to every cylinder and is only running on 3. I can pull 3 plug wires off and the idle does not change. Idk what it could be but dead cylinders. I am afraid I am going to have to find a new engine. I am going to do a compression check later this week when I have time. I am new to fords so if there is anything I should check...
View 2 RepliesFord F-150 - 1997-2003 :: Two Cylinders Misfiring - No Fuel To Injectors
97 F150 4x4 XLT 5.4L... I had two cylinders misfiring, removed COP, injectors and plugs. Reinstalled all parts and reconnected all sensors. Now I am not getting fuel to the injectors. Double checked for disconnected wires and hoses, checked all fuses and relays, also the inertia switch. Fuel pump does not hum when key turned on. Tried hitting bottom of gas tank. My question is, before I pull the tank again, is there something under the hood I may be missing. It does get quite crowded at the rear of the motor.
View 6 RepliesFord F-150 - 1997-2003 :: 1999 - Engine Shutter / Not Firing On All Cylinders?
i have a 1999 F-150 2x4 witha 5.4 liter v-8 with 151,000 miles. Last week the truck began to run rough when i accelerated (ideled fine)and felt like it wasn't fireing on all cylinders and was puffing white smoke. A few minutes later the battery light came on and the truck lost all power and shut off. I replaced the battery and alternator and everything ran fine for a week. Now the issues have come back but i'm not sure the alternator and batter have gone bad again. What could be going on? Have the coils gone bad?
View 1 RepliesFord F-150 - 1997-2003 :: 2001 V6 Head Gasket Leak Causing Water To Enter Into Cylinders And Oil Pan
Recently bought a 2001. In the process of reading about this engine I discovered there is a some what regular breakdown of head gaskets causing water to leak into cylinders and oil pan, all of which is serious.
Given the vehicle is 12 years old and has 89K miles it appears it is in the age and range of where this leakage can occur. Any knowledgeable engine rebuilders that are familiar with this issue on the 4.2 have any comments???
1. Can this issue be avoided by replacing head gaskets now rather than waiting for future failure???
2. Are there new and improved head gaskets for this motor???
3. Does the problem occur on both heads gaskets?
4. Is that all that needs to be done or are there other seals that need replacement???
Ford F-150 - 1997-2003 :: 2003 - Got Code U1262 - Random Misfire?
I have a 03 F150 with a bi-fuel 5.4 engine an it has 195000 miles. I have had trouble for some time now with misfires. I bought the truck in october of 2011 with 125000 miles and replaced all the coils and spark plugs because it was misfiring badly will running on CNG. It was fine on gasoline and never had any codes. After I replaced the plugs and coils it ran fine on CNG and gasoline.
This summer 2013 it began missing badly at highway speeds only when running on CNG. If I accelerated the miss would go away until I was light on the throttle again.I checked the misfire count and found the bad cylinder and replaced a coil. Then a day later same thing on another cylinder. I swapped a coil from another cylinder and problem went away for a day. Eventually I chased the misfire around all the cylinders on the engine until I had ended up either replacing a spark plug or swapping a coil on all the cylinders. And I still had a misfire. It seemed to be worse on days with temperatures above 90 degrees. Eventually I got it to stop misfiring.
So now 5 months later I am back again with a misfire. This time it is misfiring on both gasoline and CNG and under any throttle conditions, except coasting. I have no codes. And the misfire monitor is sending me around the engine again. I have replaced a spark plug in two cylinders and swapped 4 coils.
I'm ready to buy all new coils, but I want to be sure that it is not a waste of money since the old ones only have 70000 miles on them.
Two days ago I had the misfire monitor saying #4 in the evening and the next day without me having done any work on it it was saying #6. Later that same day it said #7 and I still hadn't done anything other than drive the truck.
I checked the connections at the firewall on the drivers side with the three large plugs that are held in with a 10mm bolt, they looked fine, no corrosion or burnt pins. I checked the connection at the ACFM which also looks good. I will check the connection at the PCM in the next day or so.
Some other problems that may be contributing:
1. I occasionally get a U1262 code (scp fault)
2. Sometimes when I check the misfire monitor it only shows 7 cylinders, sometime 9 cylinders. I am using an Innova 3160 scanner.
3. I have either a leaking valve cover gasket or leaking head gasket, because I have oil dripping from the rear bottom corner of the passenger side cylinder head right above the exhaust pipe.
Ford - Taurus :: 2000 - Check Engine Light Came One - Misfire In Cylinders 1 And 3
I have an old 2000 Ford Taurus that has been having some misfire issues. I replaced the wires and plugs about a year ago and hooray! it worked... until about a month ago when the check engine light came one. Misfire in cylinders 1 and 3... again. I ran some SeaFoam through and it did okay until this week, when the warning/flashing check engine light came back.
It is idling very hard (expected) and feels like it is trying to stall, even before the misfire came back (also to be expected??). So here is the question: is this a coil pack issue, or something more sinister (and expensive)?
Ford F-150 (2004-2008) :: Codes For Misfire On Cylinders 4 And 5 And Coil D Circuit Malfunction
I do not know the 5.4l 3v as well as my last 360ci dodge. It's a 2005 F-150 SuperCrew 4x4, got it cheap, and it's got issues. Got codes for misfire on cylinders 4 and 5 and Coil 'D' circuit malfunction. Obviously it has codes for limited power as well. was wondering how cylinder numbering goes and what coil is 'D'.
View 6 RepliesFord - Mountaineer :: 2004 - Buck / Shake And Idle Around 400 RPMs - Misfire On 3 Cylinders
I recently picked up a 2004 Mercury Mountaineer, 4.0 with 113,000 miles. OBD reader says misfire on 3 cylinders.. Installed new plug wires first.. nothing.. going to install plugs next when she is cold. Now, am I really looking at replacing the coil pack to end the misfire codes? She likes to buck and shake and idle around 400 rpms.. I know that is too low..
View 4 RepliesFord F-150 - 1997-2003 :: Misfire On 7 Cylinder
I have changed the COP and the injector as well as the spark plug. I am still having a misfire on #7 cylinder....
View 8 RepliesFord F-150 - 1997-2003 :: 1998 - Misfire With No CEL?
I have a 1998 F150 4.6 that has a misfire with no CEL. I have already tried the following: checked fuel pressure, change cam shaft sensors, changed coil, checked MAf seems ok, spark plugs and wires. On my scan tool it wont show any misfires when obviously its misfiring. When driving it will run good for about 10 seconds and then misses for about 10 seconds and it just keep going in this loop.
View 8 RepliesFord 6.0L Power Stroke Diesel :: 2004 F350 Running Rough / Misfire On Cylinders
I have a buddy at work who has an 04 f350 6.0 that is running very rough. we put a scanner on it and disabled the injectors and 1,7,8 have no change. He checked the FICM voltage and is getting 48 volts on crank and run. He checked the wiring for anything loose or rubbed but nothing seems wrong.
View 14 RepliesFord F-150 - 1997-2003 :: Misfire Detection Using Torque
97 f250 5.4 L ............. In the torque app main screen hit menu, hit settings ,scroll down to manage extra PIDs/Sensors ,hit menu again , add predetermined set and I choose Ford (including power stroke ) ,now you see a big list of things you can test live ,hit cylinder misfire (whatever cylinder # you like to see) scroll down and hit test ... well you will see on the top results a live misfire count data constantly updating ....I know because I disconnected COP #1( it took 1-2 mins and started counting) ...
View 3 RepliesFord F-150 - 1997-2003 :: Misfire Error Codes - CEL On?
Truck has been running rough and the check engine light was on so I decided to get the codes read and I got back P0302 and P0304, which from what I understand is a misfire on cylinders 3 & 4. At the same time I got Ford to do a little diagnostic and this is what they wrote for me:
"The connector for the number 2 coil is broken and will not stay plugged on to the coil and the number 2 coil is not working / replaced the wire for the coil still running rough removed the coil and plug. the plug was very badly fuel soaked started the vehicle to see if there was spark at the plug. OK. Suspect either a injector issue or a compression issue cleaned the plug seems better. "
So of course they quoted me for the works. They say I should replace the coils, plugs, and injectors???
I am pretty mechanically inclined and think I could change these things myself since I am on a budget. One tech told me is that the plugs can seize in these engines often and could scrap the whole thing??? Seems a little weird. If that happens though what could I do?
Ford F-150 - 1997-2003 :: Unexplained Misfire On Cylinder 1 And 5
My truck has developed a misfire on cylinders 1 and 5. The OBD2 scanner at autozone says code P0300, Po301 and P0305. I bought a new set of plugs and wires. Problem still there. I then replaced the both coils. Problem is still there. Is there a control module or something that could kill those 2 cylinders like on the older trucks with distributors?
View 7 RepliesFord F-150 - 1997-2003 :: Idle Very Rough Like A Misfire
I got a 97 f150 4.2l from my neighbor. he takes good care of his vehicles. he sold it to me cuz it started to idle very rough like a misfire. it is hard to start when cold spits sputters and pops. once started idles like it wants to stall, then will idle normally then back to rough. back and forth like that. runs like a champ when going down the road . check engine light was on took it to auto store they checked codes . said bad o2 sensors so i changed them. still same issue. neighbor changed coil packs checked spark plugs and wire. every thing fires good. i changed iac. still didn't fix problem. could this be a bad egr valve or sensor? if so how can i diagnose this? he also thought was a clogged cat and bored it out. tight budget can't afford to take it to a mechanic. Was told spray carb cleaner spray around engine to check for leaks that did nothing at all...
View 14 Replies