new problems
Thread Starter
|
Post Fiend
Joined: Sep 2005
Posts: 5,955
Likes: 9
From: Ohio
new problems
I was goin to detriot today the check eng light came on. The truck was bucking so i thought it had to be a miss. The check eng would flash for 30 seconds and then stay lit. The check engine light would flash when the truck would buck/vibrate bad. Took it to autozone once i reached detriot. They plugged in a scanner and it had nine codes 
coils 1, 3, 5, 6 are bad and both banks are throwin a lean code. Funny thing is i replaced coil one yesterday. My question is would these "bad coils" make the truck run lean? Or could it be a bad fuel filter make it run bad? Havent changed hte filter and it has 60k on the odo. If so how do you change em? I also forgot to add, if you go over 3,000-3500 rpms the truck starts to buck/vibrate and you cant go any faster
coils 1, 3, 5, 6 are bad and both banks are throwin a lean code. Funny thing is i replaced coil one yesterday. My question is would these "bad coils" make the truck run lean? Or could it be a bad fuel filter make it run bad? Havent changed hte filter and it has 60k on the odo. If so how do you change em? I also forgot to add, if you go over 3,000-3500 rpms the truck starts to buck/vibrate and you cant go any faster
Elder User
Joined: Nov 2001
Posts: 892
Likes: 1
From: Duluth, MN
3500 rpm's is about where the rev limiter is, thats probalbly what your feeling. Who told you all those coil packs were bad? Don't tell me the parts guy, he's ASE certified to sell you parts, no diagnose cars(there's a difference). Bad coils aren't going to set a lean code either. You could have a partially plugged fuel filter that is causing low fuel pressure. You could also have a vacuum leak somewhere causing multiple misfires. Dirty MAF could also cause both banks lean.
what were all the codes they pulled?
what were all the codes they pulled?
Thread Starter
|
Post Fiend
Joined: Sep 2005
Posts: 5,955
Likes: 9
From: Ohio
Im not saying that 3500 is my rev limiter. Im saying when im drivin my truck and rev it to 3500 it starts to miss an vibrate/bucks. After it hits 3,500 it wont rev higher. It kinda feels like its runnin outta fuel lol. Its an 06 5.4 xlt ext cab 4x4. BTW once it starts to buck/vibrate at that rpm, MOST of the time the engine light will blink.
Thread Starter
|
Post Fiend
Joined: Sep 2005
Posts: 5,955
Likes: 9
From: Ohio
Codes are:
PO171
PO300
PO301
PO305
PO306
Pending codes are:
PO171
PO300
PO305
PO306
I bought a fuel filter yesterday, as it was a cheap thing to "knock" out. I tryed takin it off and i cant get the thing off. Does anyone have instructions on how to take the fuel filt off? Wilber15, the guy at autozone told me the coils were bad after he read the code. He also sprayed Carb cleaner all over the intake to see if it would rev higher to rule out a vaccum leak. It never reved higher. So i guess that would rule out the vaccum leak? I would like to get this truck in somewhat runnin condition because i am trading it in tomorrow on a different ford truck. The reason why i went to detriot is because I wanted to see what i could get for my truck at the dealership where i found the ford truck i wanted. And when i got their in was running good. And since i am possibly trading it in tomorrow I dont wanna drive back up their with my truck runnin like crap, plus they wont be happy because when i left that dealership yesterday, it was runnin good.
PO171
PO300
PO301
PO305
PO306
Pending codes are:
PO171
PO300
PO305
PO306
I bought a fuel filter yesterday, as it was a cheap thing to "knock" out. I tryed takin it off and i cant get the thing off. Does anyone have instructions on how to take the fuel filt off? Wilber15, the guy at autozone told me the coils were bad after he read the code. He also sprayed Carb cleaner all over the intake to see if it would rev higher to rule out a vaccum leak. It never reved higher. So i guess that would rule out the vaccum leak? I would like to get this truck in somewhat runnin condition because i am trading it in tomorrow on a different ford truck. The reason why i went to detriot is because I wanted to see what i could get for my truck at the dealership where i found the ford truck i wanted. And when i got their in was running good. And since i am possibly trading it in tomorrow I dont wanna drive back up their with my truck runnin like crap, plus they wont be happy because when i left that dealership yesterday, it was runnin good.
Trending Topics
Elder User
Joined: Dec 2007
Posts: 680
Likes: 0
From: Michigan
If this link doesn't work, go to the article section and search for fuel filters. Step by step instructors and pictures of how to replace.
Replacing The Fuel Filter 2004 And Newer F150 Pickups .: Articles
So if you just replaced your fuel filter- is it installed backwards? Sometimes codes will be set for other reasons, I would disconnect the battery for 15 minutes to clear the pcm and any codes and start fresh. Also, carb cleaner is not good for the maf, so hopefully he didn't screw something else up.
Good luck, I know the feeling, I just spent $300 for my airbag lite and now my 4x4 won't engage and I'm trying to trade my truck in as well!
Replacing The Fuel Filter 2004 And Newer F150 Pickups .: Articles
So if you just replaced your fuel filter- is it installed backwards? Sometimes codes will be set for other reasons, I would disconnect the battery for 15 minutes to clear the pcm and any codes and start fresh. Also, carb cleaner is not good for the maf, so hopefully he didn't screw something else up.
Good luck, I know the feeling, I just spent $300 for my airbag lite and now my 4x4 won't engage and I'm trying to trade my truck in as well!
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Ford Super Duty: 5 Things Owners LOVE, 5 Things They LOATHE!
Joe Kucinski
Every 2026 Ford Truck Engine RANKED from WORST to FIRST!
Michael S. Palmer
The Best F-150 Deal of Every Trim Level (XL through Raptor)
Joe Kucinski
I dont know what to do. I might just trade it in. What are you gettin? I think i am gonna get a 06 F350 crew cab long bed diesel.
Super Moderator
Joined: Aug 2003
Posts: 25,479
Likes: 738
From: Isanti, MN
Hey, Matt! Looks like I got here a bit late!
The lean condition is causing the misfire codes, not the other way around so that's where I'd start. Having misfire code(P030X) does NOT mean you have bad coils. If you see only one cylinder is the culprit (i.e. P0302) then the coil and plug are a good place to start. But the chances of all of them going bad simultaneously are somewhere between slim and none, so it's pretty safe to rule those out. Especially considering the fact that you don't have that many miles on the truck.
Good call changing the fuel filter, a cheap way to rule out a common problem.
My best guess is your MAF sensor. I'd try cleaning it off and seeing how it runs.
Good luck!
The lean condition is causing the misfire codes, not the other way around so that's where I'd start. Having misfire code(P030X) does NOT mean you have bad coils. If you see only one cylinder is the culprit (i.e. P0302) then the coil and plug are a good place to start. But the chances of all of them going bad simultaneously are somewhere between slim and none, so it's pretty safe to rule those out. Especially considering the fact that you don't have that many miles on the truck.
Good call changing the fuel filter, a cheap way to rule out a common problem.
My best guess is your MAF sensor. I'd try cleaning it off and seeing how it runs.
Good luck!
Elder User
Joined: Nov 2001
Posts: 892
Likes: 1
From: Duluth, MN
Dang, if you go back to the 2nd post of this entire thread....I think I stated everything that has been mentioned. An spraying carb cleaner no longer works for finding a vacuum leak unless it's a big leak. The computers are so sophisticated that they can detect a leak that spraying car cleaner will not. You need a scan tool to find the leaks.
I would still clean your MAF, as you may have dirt or a bug stuck to the sensor. Inspect all vacuum lines and hoses on the engine for damage or a line that has come unhooked.
Fuel pressure(failing pump) could still be a concern that a new filter will not fix. P0171 is Bank 1 lean, but your getting misfire codes on Bank 2 as well, so that pretty much eliminates a failing O2 sensor.
I would still clean your MAF, as you may have dirt or a bug stuck to the sensor. Inspect all vacuum lines and hoses on the engine for damage or a line that has come unhooked.
Fuel pressure(failing pump) could still be a concern that a new filter will not fix. P0171 is Bank 1 lean, but your getting misfire codes on Bank 2 as well, so that pretty much eliminates a failing O2 sensor.
Thread Starter
|
Post Fiend
Joined: Sep 2005
Posts: 5,955
Likes: 9
From: Ohio
Hey, Matt! Looks like I got here a bit late!
The lean condition is causing the misfire codes, not the other way around so that's where I'd start. Having misfire code(P030X) does NOT mean you have bad coils. If you see only one cylinder is the culprit (i.e. P0302) then the coil and plug are a good place to start. But the chances of all of them going bad simultaneously are somewhere between slim and none, so it's pretty safe to rule those out. Especially considering the fact that you don't have that many miles on the truck.
Good call changing the fuel filter, a cheap way to rule out a common problem.
My best guess is your MAF sensor. I'd try cleaning it off and seeing how it runs.
Good luck!
The lean condition is causing the misfire codes, not the other way around so that's where I'd start. Having misfire code(P030X) does NOT mean you have bad coils. If you see only one cylinder is the culprit (i.e. P0302) then the coil and plug are a good place to start. But the chances of all of them going bad simultaneously are somewhere between slim and none, so it's pretty safe to rule those out. Especially considering the fact that you don't have that many miles on the truck.
Good call changing the fuel filter, a cheap way to rule out a common problem.
My best guess is your MAF sensor. I'd try cleaning it off and seeing how it runs.
Good luck!
On the bright saide, i cant wait till our next meet. Now will have a 6.0 crew cab long bed 4x4. Do you guys think i should just trade her in and say ***** fixin it?
Thread Starter
|
Post Fiend
Joined: Sep 2005
Posts: 5,955
Likes: 9
From: Ohio
Ok, thanks! And yes that will be fun. Dont forget to let me know when the next meet is. Also, since i may be tradin the truck in tomorrow, where would you go next if it aint the MAF? Ill the MAF in the morning. Sorry for the rush, im just runnin outta ideas and id like to get this thing runnin halfway decent so i dont get raped in price incase they decide to take it on the road. Plus, ill feel bad dickin over them if the trucks runnin like **** lol.
Thread
Thread Starter
Forum
Replies
Last Post
diesel soot
1999 - 2003 7.3L Power Stroke Diesel
13
Aug 2, 2011 11:06 PM
