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2006 ford f150 misfire/poor accelleration fixed

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Old 01-21-2011, 07:05 AM
hofec1 hofec1 is offline
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2006 ford f150 misfire/poor accelleration fixed

It seems alot of people are having the same problem I had which I have resolved. So I thought it would be a good idea to post this to possibly save people some money. Mine started out as a misfire problem which I first changed the plugs. I followed the Ford TSB and got all 8 plugs out with no problems. Still misfiring and setting a code for bank 1 catylatic converter ineffectiency bank 1. By the way bank 1 is passenger side. After changing bank 2 because the guy at Advance auto said bank 1 was drivers side. Still setting misfire codes and for bank 1 cat. ineff. So after installing new coil packs and 2 injectors, Still misfiring #3 and #1 and cat. ineff. bank 1. Decided to buy my own code reader, which is a must if you are going to try to work on these new vehicles. Decided to unplug o2 sensor to see where bank 1 really was. Thats when I found out bank 1 was indeed passengers side. Changed o2 sensors. Still misfiring. Decided to buy the true bank 1 cat converter. Dropped old bank 1 cat and found all of the internal workings all broke up and clogging converter. Truck runs like new. I spent 178.00 for bank 1 converter at pep boys. After spending O approx. 600 in other parts that didnt fix it. I think the spark plugs not being changed until 115000 miles caused the converter to go bad. Buy a code reader and it makes it a whole lot easier to diagnose your problem yourself. and save a whole lot of money throwing new parts at it.

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Old 01-21-2011, 10:39 AM
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Deluxe05 Deluxe05 is offline
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For starters, welcome aboard, hofec1!!

Thanks for taking the time to sign up & provide that information!! It is always nice to see posts where the owner has tracked down a solution to an unusual problem. For those of us that frequent these forums, it gives us one more useful pointer for some future forum visitor that comes seeking help with the same problem.
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Old 01-21-2011, 07:27 PM
Wilber15 Wilber15 is offline
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This is where getting it diagnosed CORRECTLY would have saved u money. Common problem on these 5.4L's. Just did 1 this week. Both banks.
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Old 01-21-2011, 09:34 PM
FordLvr30 FordLvr30 is offline
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I have always said that paying the dealer the diagnosis fee is always worth the 80-100 bucks. As opposed to throwing parts at it and asking the 8.00 an hour Advance Auto Parts clerk what to buy and how to fix your truck...
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Old 01-21-2011, 09:44 PM
hofec1 hofec1 is offline
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wilber15 you are so correct. I probably would have saved money,BUT the dealers here in the Richmond, VA area have not been so friendly or affordable. Plus i really enjoy working on my own vehicles. I buy a few vehicles a year and try flipping them after making a few minor repairs. These F150's are great trucks easy to replace parts on anyhow. Is there anything I should be paying special attention to that would have caused the converters to go bad other than spark plugs,fuel injectors and COP's. Thanks
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Old 01-22-2011, 09:06 PM
hillclimbin hillclimbin is offline
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Quote:
Originally Posted by hofec1 View Post
wilber15 you are so correct. I probably would have saved money,BUT the dealers here in the Richmond, VA area have not been so friendly or affordable. Plus i really enjoy working on my own vehicles. I buy a few vehicles a year and try flipping them after making a few minor repairs. These F150's are great trucks easy to replace parts on anyhow. Is there anything I should be paying special attention to that would have caused the converters to go bad other than spark plugs,fuel injectors and COP's. Thanks
When u say u replaced the true bank 1 cat what does that mean, since are trucks have 2 cats on each side, are u talking about the bigger cat in the rear?
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Old 01-22-2011, 10:00 PM
hofec1 hofec1 is offline
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My truck is a 2006 with 1 cat on each side. The build date has something to do with yours having 2 per side and mine having 1. I changed both cats 1 on bank one passengers side and 1 on bank 2. First changed bank 2 thinking it was bank 1
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Old 03-26-2015, 08:45 PM
Philip Natale Philip Natale is offline
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2006 F-150 misfire

Quote:
Originally Posted by hofec1 View Post
It seems alot of people are having the same problem I had which I have resolved. So I thought it would be a good idea to post this to possibly save people some money. Mine started out as a misfire problem which I first changed the plugs. I followed the Ford TSB and got all 8 plugs out with no problems. Still misfiring and setting a code for bank 1 catylatic converter ineffectiency bank 1. By the way bank 1 is passenger side. After changing bank 2 because the guy at Advance auto said bank 1 was drivers side. Still setting misfire codes and for bank 1 cat. ineff. So after installing new coil packs and 2 injectors, Still misfiring #3 and #1 and cat. ineff. bank 1. Decided to buy my own code reader, which is a must if you are going to try to work on these new vehicles. Decided to unplug o2 sensor to see where bank 1 really was. Thats when I found out bank 1 was indeed passengers side. Changed o2 sensors. Still misfiring. Decided to buy the true bank 1 cat converter. Dropped old bank 1 cat and found all of the internal workings all broke up and clogging converter. Truck runs like new. I spent 178.00 for bank 1 converter at pep boys. After spending O approx. 600 in other parts that didnt fix it. I think the spark plugs not being changed until 115000 miles caused the converter to go bad. Buy a code reader and it makes it a whole lot easier to diagnose your problem yourself. and save a whole lot of money throwing new parts at it.

My 2006 F-150 4x4 with 4.6L has 230,000+ miles on it and has never given me a single problem. Until now.

I was driving to a job a few weeks ago. She was running fine, like normal, and then, all of the sudden, the check engine light came on and she started missing and lagging. I immediately went to a parts house and had her diagnosed. #3 misfire and #1 misfire. No problem. I bought 2 new coils packs and put them on in the parking lot. No change. She still idled rough, had no power and the codes came back. So, I finished my job, went home, and waited until the next day to do some major tuning.

I bought all eight coil packs, 8 new motorcraft plugs, a new EGR valve with DPFE sensor, a new fuel filter and MAF cleaner. I changed out everything, cleaned MAF, pulled out & cleaned injectors, cleaned K&N air filter and went to mechanic and had the oil and filter changed. Cleared codes, drove off and still had the hesitation, vibration, no power and the codes came back saying #3 misfire and then later, #8 misfire as well.

WTH is going on???? Any help? Please!!!
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Old 04-06-2015, 11:04 AM
MAHighboy77 MAHighboy77 is offline
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Quote:
Originally Posted by Philip Natale View Post
My 2006 F-150 4x4 with 4.6L has 230,000+ miles on it and has never given me a single problem. Until now.

I was driving to a job a few weeks ago. She was running fine, like normal, and then, all of the sudden, the check engine light came on and she started missing and lagging. I immediately went to a parts house and had her diagnosed. #3 misfire and #1 misfire. No problem. I bought 2 new coils packs and put them on in the parking lot. No change. She still idled rough, had no power and the codes came back. So, I finished my job, went home, and waited until the next day to do some major tuning.

I bought all eight coil packs, 8 new motorcraft plugs, a new EGR valve with DPFE sensor, a new fuel filter and MAF cleaner. I changed out everything, cleaned MAF, pulled out & cleaned injectors, cleaned K&N air filter and went to mechanic and had the oil and filter changed. Cleared codes, drove off and still had the hesitation, vibration, no power and the codes came back saying #3 misfire and then later, #8 misfire as well.

WTH is going on???? Any help? Please!!!
Any luck on your problem? I have a 2006 with the 5.4 and I have done the same all 8 plugs, 8 cop's, i have changed a few injectors yet I still get misfires. Now when I run injector cleaner or Sea foam in my truck it runs fantastic for about 500 miles, about a full tank and a half then my problem comes back. When i changed the plugs about 2000 miles ago I found a few broken plugs, I now can assume that this caused my passenger side Cat to go bad? Causing a very slight break down at idle, then on the highway under slight load i get a check engine light flash throwing misfire codes, but if I keep her under 60mph in OD she runs fine with still a very slight break down causing the engine to shimmy but no buck. I hooked up to my car trailer this weekend, when i got on the highway and got it up to 65 I instantly got misfires. So if anyone can provide further info that would be great! I know the FPDM's go bad in these trucks, also injectors clog, as well as over time they have back fuel pressure sensors in them. But none of these common problems convince me the problem leads to them due to the truck running great when I run seafoam in the gas tank.
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