Ford F-150 - 1997-2003 :: Misfire Detection Using Torque
Jun 24, 2013
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) ...
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I had recently thrown a code for a 'misfire detection monitor disabled' , never did address the issue. But just the other day the service engine light went off, the light had been on all this time and now it's off. My question is, how do I know if the light is just burned out. Is there something safe I could do to make the light come back on just to see if the light is actually still works.
2000 f 150 4.2 v6 232,000 miles ....
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I have a 97 F-150 Supercab XLT, 4X4, 4.6L W, 4r70W with electronic Overdrive, manual shift transfer case. I need to remove and replace the Torque Converter. My question is: Would it be easier to drop the transmission and transfer case or pull the engine loose and move it forward to get at the torque converter?
It is shifting in and out of overdrive to third, and then back into OD, and back into third erratically and for no apparent reason. It is also slipping intermittently in first from a dead stop and locking all at once, shifts hard then. When I first drive it the OD light does not flash and the OD off switch works, once it warms up good it starts shifting erratically and the OD off switch starts flashing, then the off switch does not work.
I did not get any codes returned on autozones little scanner and am taking it to the ford dealer for a full scan today to see if there might be any other damage or cause for this problem. The problems started when I blew a hose to the trans cooler in the radiator and lost fluid. I didn't notice the blown hose until it started slipping and pulled over, replaced the hose and fluid. Had problems ever since. I have cleaned the MAF sensor and replaced the ABS sensor in the differential so far.
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What the torque spec is for the driveshaft to rear differential flange mounting bolts on the 99 F150 4x4 supercab?
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Tell me the torque specs for the various attaching nuts of the front hub assembly for the 99 F150 4x4 5.4L (large nut on the spindle, mounting bolts to back of spindle, etc if any) ? I will need them to put everything back together after checking the tone ring for my ABS problem.
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I have a 2002 SuperCrew 4x4 that makes a squealing sound that starts at 3000 rpm and slowly goes away as it approaches 4000 rpm. It does this when you are in park or in gear. I believe the torque converter is going bad, but just want to make sure before I tear it all down.
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I have a '99 F150 w/ the 5.4 and 4R70W, with 226K miles. I am experiencing what I believe is a TC shudder after the tranny shifts into OD between approximately 40-50mph. This sounds like a pretty common problem with this particular tranny, but some of what I've read describes the shudder as feeling akin to driving over rumblestrips, but what I'm experiencing is a very sharp, bucking. Is this how the TC shudder feels, or am I actually dealing with a misfire. Btw, I did completely change the tranny fluid with Mercon V, and added a friction modifier, but no change. I also read that the TC unlocks when the brake lights come on, so I tried lightly hitting the brakes when the bucking was occuring, but it continued.
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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.
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My 97 F-150 has 208,000 miles on the original engine. It started misfiring originally on just 2 cylinders, 1 and 8, after pulling the codes. I also get a P0420, catalyst system below threshhold bank code being thrown, but I think it is because of the misfires.
To remedy this I've done the following:
1. Spark plugs are relatively new and were changed completely a few months prior to issues.
2. Coil Packs were changed on both sides. Additionally, Cylinders 1 and 8 are on separate coil packs.
3. Spark Plug wires were changed
4. Did a resistance test on each fuel injector and they all passed.
None of this has worked. Am I missing something obvious? From my friends I've heard everything from my exhaust is plugged to I need to change all my injectors. Injectors are costly and I'm not even sure how to check if my exhaust is partially plugged, but it seemed to be flowing fine. Also, I pulled plug one since it was simple to get to and noticed it was slightly brown, like it had oil on it.
I got frustrated and continued driving my truck until the problem degenerated into severe misfiring and now I cannot get it started at all (Wrong move). I bought a car and haven't drove it since, and have it sitting behind my house. Now the cops want to tow it because the registration is has expired so I've decided to move it into my garage so I can work on it. Part of me wants to junk it, but I've put a lot of time, money, blood, sweat, tears, and curse words into this truck and am motivated to get it back up and running since the transmission and front suspension had been replaced recently.
What to do!?!?
1. Go to the Ford dealership and have them diagnose the issue and then try to fix it? (I have little confidence in them from the stories I've heard)
2. Pull the engine, tear it apart, and rebuild it?
3. Drop a used/rebuilt engine in?
4. Call me crazy and say junk the truck and buy a different one?
Currently leaning towards option 3...
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I have changed the COP and the injector as well as the spark plug. I am still having a misfire on #7 cylinder....
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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.
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On my '99's 5.4l with 55k, I've got a slight misfire occasionally with lower rpms and higher torque - basically going up a grade that's not quite steep enough for the truck to downshift, but clears up right away the instant it downshifts and gets some rpm. It generally seems like weak spark, or perhaps an injector spray pattern such that it doesn't always get fired off.
To give some history, the truck had more or less sat in a farm garage for ~5 years driven maybe once a quarter before I picked it up ~2 years ago. When I first picked it up, it misfired all over the place. I didn't think much of it, considered it gummy fuel, and dumped a couple cans of SeaFoam in the tank, replaced all 8 plugs (pretty sure with motocraft plugs though I don't explicitly remember), checked my air filter, etc and the misfires cleared right up and it purred nice and smooth like a happy little motor. That was at ~45k, or 10,000 miles ago.
Now it's starting to hiccup again and I'm not entirely sure why. The plugs should be nowhere near burned up yet and there are no lights on the dash. It's never come close to overheating and the only oil leak I know of is that famous small drip on the inside-rear of the passenger side bank drips on the exhaust header just enough to stink every so often when I come to a stop. I don't believe I'm burning any oil and certainly not near enough oil to foul a plug. Including that drip, I go about 3,000 miles before needing to add a quart. I've dumped 2 bottles of Berryman's in the fuel tank and it seems to work, but it's definitely not gone, so I'm thinking it's probably not oil related and more fuel/spark.
I'd had it in the back of my head to replace the fuel filter as well, but I hadn't gotten around it yet as it seems to be getting fuel at high rpm's just fine. I went ahead and bought the filter the other day and plan to install it shortly. It doesn't really make sense that that's what it would be, but I figure I'm due and it's worth a shot. If they were old plugs, I'd just replace them out, but they seem to new to be causing any issues.
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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?
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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?
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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...
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I have a 1997 F-150 2WD 4.6L V-8 that began having random misfires as I would drive. I was planning on going out today to get the new plugs and coils however when I got off work and pulled into my drive something happened when I went to leave the truck wouldn't even crank it just made a clicking noise. The battery has full power (the radio ect. still works). I am hoping that the problem is with the coils and plugs but if not ...
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I have a 2002 f150 5.4L 4x4 7700 and she was misfiring bad the other day I changed coil pack 1 and 4 because that's what my codes where reading and i changed all of my spark plugs just because the check engine light went away for a little over a day and boy was she running good she had a little hiccup with a misfire but it quickly fixed itself but later now my check engine light is back on and is miss firing again and this time it isnt fixing itself what is going on with my truck?
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I have 97 150 it has a misfire on cylinder 4 and 6. I put new coil packs on and new plug wires. Spark plugs are only a year old. what else it could be?
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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.
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I have an 01 5.4 Triton with engine light on I put it on the scanner and it read miss fire on cylinder 6 and 1 I changed the cops and plugs boots and spring erased the codes but the check light is back on and scanner is say miss fire on same two cylinders u can hear it in the exhaust u can smell gas when sitting at an idle around 40 MPH has a slight engine shake goes away when u accelerate I am not sure what else to do some one told me to check for vac leaks and fuel pressure.
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So my 99 F-150, 4.2L started throwing a code a few weeks ago, P0306 #6 Cyl Misfire. This thing has got 238,000 and has been the most reliable commute vehicle I've owned.
Today I changed all the plugs and wires (they were due anyways) which didn't resolve the issue. After clearing the code, got about 3 miles out and it came back. Running SeaFoam through the system on this tank as well, but I'm leaning towards an EGR blockage like what is described here:
Sparky's Answers: 1999 Ford F150, P0306 Misfire Cylinder #6
I was about to buy a new coil pack but I'd rather not continue to throw parts at this, as I've read many others do with this same exact situation, only to end up with the same code. I've replaced the coil pack once already a few years ago when I lost a cylinder on the way to work.
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