Ford F-150 - 1997-2003 :: P0307 Fault / Misfire On Cylinder 7
I have a 2001 King Ranch F150, which has a 2004 Lincoln Navigator 5.4 DOHC Intech engine installed. The engine was installed in 2005 and had less that 100 miles on it. The engine now has approximately 95000 miles and I have recently got the P0307 fault-miss fire on # 7 cylinder. I have installed a new spark plug, COP, and fuel injector. The fault has returned. Any clues to the cause of my problem?
View 5 RepliesFord F-150 - 1997-2003 :: 1999 F250 Skipping After Rain - Code P0307 / Cylinder 7 Not Fire Correctly
99 F250LD 4x4 w/5.4 and 215k . I'm sure I'm not the only one with this problem. Just had quite a bit of rain in my area. I didn't drive the truck in it but 3 days after the rain stopped I did. Skipping badly ! It has done it before and will clear itself up after a heat cycle or two. This time it kicked a p0307 code. # 7 cylinder not fire correctly I believe. I got ready to replace the cop but decided to wait a day. In the mean time I pulled the connector and blue compressed air through it and the male connector.
The next morning I decided to drive it before replacing the coil. Absolutely no skipping at all. Drove at different speeds , up heels slow , high speeds, no skipping. Ran the truck for about 20 minutes or so. Is the connector getting moisture in it ? Can I fill the connector with dielectric grease? Is there another problem. I cleared the codes and am going to drive a couple of cycles to see if any come back. Like I said it has done this before but not bad enough to throw a code so I'm not sure if it's always number 7.
Ford 7.3L Power Stroke (1999-2003) :: P0308 Fault Code / Misfire Detected On Cylinder 8
New to diesel trucks and wondered if this recurring code is a serious problem. I clear DTC and truck will run fine. Might stay off for 2 days or 2 months and same code comes back. Truck seems to run just fine even with service light on.
View 5 RepliesSilverado :: 2003 With Code P0307 Misfire / CEL Flashing
I'm having an issue with my 2003 Silverado, current engine is LS1 from a WS6 Trans Am, mostly stock, stainless headers, no cats, stall converter. I replaced fuel pump a few weeks ago and last week i took a road trip and when I hit the interstate the CEL started flashing. I pulled over and used my scanner and saw that it was P0307. I cleared code and continued on. The only noticeable problem was that it was not shifting into overdrive. After a while the light quit flashing and eventually it shifted into OD.
This happened several more times on a 750 mile trip. I had a mechanic friend check it over and he couldn't find anything, wasn't throwing codes at that time. He check sparked plug, swapped the coil to #5 and still had the issue. Didn't get a chance to check the fuel injector. The trip home it did the same thing. IF it were indeed a bad injector, wouldn't the problem be ongoing instead of coming and going? Took to local chevy dealer thinking they could diagnose it but since it didn't throw a code they couldn't find anything.
Ford F-150 - 1997-2003 :: Code P0306 - Cylinder 6 Misfire
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.
Ford F-150 - 1997-2003 :: CEL Code P0301 / Misfire With Cylinder 1
My 97 F150 through a CEL Tuesday night P0301 so I picked up a new plug because it's cheap and simple, but that didn't do anything. Spark plug wires are about 3 months old, I also swapped injectors between 1 and 2, and misfire stayed with cylinder 1. It also gained a tap when the misfire started but only above idle, but it doesn't sound like a rod knock.
I also noticed if you unplug injector 1at idle it taps/knocks 3 or 4 times, however if you unplug any of the others it doesn't do that. I checked and I definitely have good spark from the plug. I plan on picking up a new compression tester tomorrow since mine never was returned. If you take the oil fill cap off it doesn't have any blow by at idle, however if you rev it you get a quick cloud out of it.
I thought about picking up a kit to check the injector pulse.
Ford F-150 - 1997-2003 :: Code PO304 - Cylinder 4 Misfire
I have a '98 F150 4X2 extended cab with a 4.2l with 233K on it. I have no problem with drivability when I drive 5 miles to work. However, a couple of weeks ago when I had to drive 15 miles to the liquor store to get what I needed (I live in a dry county) I got back into my truck, started it and drove of. It drove like crap like I lost a cylinder. Drove it back home those 15 miles, let it cool off, put my scanner on it and got a PO304 code and I think a PO174 (bank 2 lean) code. Went to the #4 cylinder and found the plug had loosened up.
Tightened it back up, cleared the codes, and went through my normal weekly routine of driving to work with no problem. Made a booze run the next weekend and the same thing happened. Limped back home and found another PO304 code. Found the plug to be tight and in good condition but changed all the plugs since they were cheap copper core and had 20K on them. The wires only have 20K on them, too. Installed platinum plugs, drove all week 5 miles to work and back just fine. Made another 15 mile run yesterday and the same crap happened all over again after I got out of the store and drove home.
Ford F-150 - 1997-2003 :: 1998 - Cylinder 1 Misfire / Code P0301
I have a 98 F150 4.2L with code P0301 Cylinder 1 Misfire.
This is what I have done so far. New plugs, coil pack, plug wires, TPS, EGR, EGR Vacuum control regualier, DMCP, canister, all of these parts are new and was bought from the ford place. Have taken the egr value, and egr value bracket off to see if carbon blockage was present, but it was clean. It was clean in the motor also. Have blown air through the metal tube that connects to the egr value and it come out the tail pipe very good, so no blockage their. Have cleaned throtle body and injectors. Have tested fuel injector with tester and it works correctly. Motor holder pressure. Have correct fuel pressure.
Do not have any vacuum leaks, it holds vacuum correctly. Crankshaft sensor is fine. Went throw 4 cans of break parts cleaner, spraying on intake while motor was running, motor did not idle up or change. I have done all this and it still shows code P0301, and it still skips. Here's the catch, if you unplug the vaccum off the egr the misfire goes away, or unplug the EGR vacuum control regulator it goes away, or if you unplug the DMCP sensor it goes away, it does not matter witch one you unplug, the misfire goes away.
I have had several different test done the the truck, but all the test only show that one code P0301, they do not show any other codes, or problem's with my truck.
Ford F-150 - 1997-2003 :: 2002 - Cylinder Misfire And A Lean Code
My truck was running fine the past few days minus a cylinder misfire and a lean code the misfire was due to a coil pack being out no big deal on that part but yesterday on 7/30/13 my temp gauge turned off my truck wouldn't go below 1k rpms and then the over heating light came on. i drove the one mile home and turned it off an hour later i went back out to my truck to get to work and it refused to start.
I decided to just hold my foot down on the gas and crank it and it eventually started drove it to work with the same symptoms. now today its doing the same thing except now the truck is broke down in the parking lot at my job the engine is flooding cause i can smell it last night i changed the thermostat. I can get so that i can get my truck up in running its a 2002 f150 5.4L 4x4....
Ford F-150 - 1997-2003 :: CEL Code Signifying A Cylinder 3 Misfire - Shudder / Hesitation
I will add as many details as possible :
2000 f150 4x4 offroad package
5.4L with 131k on it
new Dorman intake manifold
new Global Automotive (Ebay) COPs
New Motorcraft spark plugs
About 1500 miles ago I started throwing a code signifying a cylinder 3 misfire. The truck would bog down real bad and then after 5-6 seconds of no power it would return to normal. I tried replacing the COP (both with new and then with one from another cylinder) and plugs but no resolution. So I talked to the local ford service manager and he said it sounded like intake manifold problems.
Replaced the intake manifold and no more codes were being thrown.
1500 miles later and today the truck started having a hesitation/shudder when I was sitting in a drive-thru. I put the truck in neutral and park and neither solved the issue. With the earlier issue, when I would put in neutral and increased rpm, the issue would resolve.
I pulled out of the drive-thru and the hesitation was consistent no matter what the rpm or speed. The truck feels almost sluggish and lacks power. The hesitation is like 2x/second. When accelerating its almost like the rpms and speed hesitate, jump, hesitate, jump.
Ford F-150 - 1997-2003 :: 1998 4.6L - Misfire On Cylinder 6 / Code P0171 And P0174
P0306 (ok #6 missfire) with P0171 & P0174 --- Do I chase electrical or fuel or both. Afraid to assume anything but probably would normally address the misfire electrical first.... Don't want to go down that 'primrose path' if others have been there first!
View 4 RepliesSanta Fe (DM - 2013+) :: Engine Fault P0303 Cylinder 3 Misfire Code
We got our latest Santa Fe computer email and it warned of an engine fault. The car itself was not flashing any warnings though. Took it to the dealer and they said OBD was throwing a P0303 cylinder 3 misfire code. They shifted the ignition coil, and replaced the injector and seal before resetting the code. They had the car for 3 days though. Car was not running rough or anything else you would expect from this type of issue. Still trying to figure out why we got the email with no indication of trouble from the car itself.
View 3 RepliesFord Super Duty (1999-2016) :: 2005 F350 - Misfire Code P0307
I had a 05 f350 5.4 3v come into my shop with a CEL. Did the usual it had a p0307. So I did the usual again changed plug and coil plug cam out no prob they were done 15k ago. Test drove a few times and it was fine. Few days later customer brought back with same code p0307. thought maybe I got a bad plug or coil so I moved them to #6, misfire stays on #7. When I drive it local its fine when I go to pull on to highway and really put my foot in it CEL flashes (misfire) and it pings like crazy and loses all power. Scan it back at shop and still only p0307!!
View 10 RepliesFord/Mustang :: 1997 - Getting Error Code P0304 / Cylinder 4 Misfire
1997 Ford Mustang 4.6L EFI engine with 67K miles. The engine is actually now in a Factory Five Roadster. It sat on a stand for 5 years but runs well now with the exception of the code. I keep getting a code P0304 (cylinder 4 misfire) and I've checked the plug - the code seems accurate; it is misfiring.
Things I've tried:
1)swapped plugs,
2)this is a dual coil engine so I've swapped coils,
3)the #4 plug is the longest sparkplug wire so I've gotten high-performance wires,
4)heavily grounded the AL head,
5)put dielectric grease on the plug,
Still, ONLY cylinder 4 gives the misfire.
Ford 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 - Ranger :: 1997 - Check Engine Light On With P302 Computer Code / Misfire On Cylinder 2
1997 Ford Ranger with 190K miles has check engine light on with P302 computer code, meaning misfire on cylinder 2. Engine runs rough at idle only once it warms up, which only takes a minute. It is usually fine while driving, but it's a lot easier to feel a misfire at lower RPMs than at higher ones. Added fuel injector cleaner to gas for a couple tanks, no change. My mechanic has checked spark plugs, fuel injector, o2 sensor, and everything is ok. Dry compression test shows good compression. He thinks it may be a valve sticking, which means a valve job: expensive. Is there anything else that can be done? Why is there no misfire when it is first started?
View 9 RepliesFord 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 :: Engine Misfire On Cylinder 4 And 6
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?
View 1 RepliesFord F-150 - 1997-2003 :: 2001 - Misfire On Cylinder 6 - CEL On?
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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