Need help: Rough idle, sputter while driving, P0174
Thread Starter
|
Member
Joined: Dec 2012
Posts: 19
Likes: 0
From: Ft. Lewis, WA
Need help: Rough idle, sputter while driving, P0174
Hey guys, I just recently bought a 99 Navi. Ran great the first 2 days but then out of no where picked up a really bad sputter/misfire while driving and at idle. Finally threw a code this morning: P0174 lean on bank 2. I have read alot of guys replacing their pcv and the elbows and such but those guys were just having idle issues. Didn't know if mine could be something else.
Thanks guys
Brandon
Thanks guys
Brandon
Senior Member
Joined: Aug 2011
Posts: 757
Likes: 3
From: ky.
Check the elbow, and check for other vacuum leaks, it won't run worth a damn with unmetered air entering the engine. A good tune-up probably wouldn't hurt either if you don't know when the last one was.
Thread Starter
|
Member
Joined: Dec 2012
Posts: 19
Likes: 0
From: Ft. Lewis, WA
So here is what I am thinking....
Motorcraft plugs
Motorcraft PCV valve
PCV elbow
Motorcraft air filter
Motorcraft fuel filter
Clean MAF
Clean IAT
Clean IAC
If it comes down to it I will order some UNEEK COPs.
Motorcraft plugs
Motorcraft PCV valve
PCV elbow
Motorcraft air filter
Motorcraft fuel filter
Clean MAF
Clean IAT
Clean IAC
If it comes down to it I will order some UNEEK COPs.
Senior Member
Joined: Jul 2007
Posts: 3,291
Likes: 0
From: Beaverton Or.
Check for vacuum leaks. Because it is only lean on bank 2, I would also run some techron through the fuel to try and clean up the injectors in case one is gummed up. Typically a vacuum leak in the intake system or pcv system will lean out both banks causing p0171 and p0174 but not always. I recently helped a friend fix a p0174 that turned out to be a leak at the intake gasket on bank 2 so that is another option.
Technical Article Contributor
Joined: Oct 2005
Posts: 25,641
Likes: 19
From: MI
If it's at idle, I would check the EGR valve. Disconnect the green line and tap the valve while its missing @ idle.
If the idle smooths out after disconnect, you have a EVR problem. If it smooths out after tapping the valve, the valve is sticking.
If the idle smooths out after disconnect, you have a EVR problem. If it smooths out after tapping the valve, the valve is sticking.
Technical Article Contributor
Joined: Oct 2005
Posts: 25,641
Likes: 19
From: MI
Uneek coils? Why? Well, remember, -you have a 4 valve engine (Cobra base), so you need 4V coils.
Trending Topics
Thread Starter
|
Member
Joined: Dec 2012
Posts: 19
Likes: 0
From: Ft. Lewis, WA
Thanks guys went ahead and got all the tune up parts listed above. Gonna install them tomorrow.
jbrew: It is at idle and while driving. It's really between UNEEK and Global as for the COPs. Also mine is a SOHC VIN# L not A.
I had it running and disconnected the intake tube from the TB and it didn't run any different. But if I tried to start it without the tube on it wouldn't crank. So I am definitely gonna clean the MAF and IAT. Also it seems to run fine on cold starts but when it warms up seems to be when it is really bad!
jbrew: It is at idle and while driving. It's really between UNEEK and Global as for the COPs. Also mine is a SOHC VIN# L not A.
I had it running and disconnected the intake tube from the TB and it didn't run any different. But if I tried to start it without the tube on it wouldn't crank. So I am definitely gonna clean the MAF and IAT. Also it seems to run fine on cold starts but when it warms up seems to be when it is really bad!
Technical Article Contributor
Joined: Oct 2005
Posts: 25,641
Likes: 19
From: MI
Actually it's a 32 valve engine, 4 per cylinder. So you need valve specific coils for that one.
It does sound like a coil problem. After a fresh KAM reset, they will run better for a time, then heads right back to misfiring. Thing is, a coil problem usually won't be evident at idle unless you have a dead cylinder (no fire at all) or close to it. With that, you should definitely get CEL.
Still, I'd check the EGR valve exactly as I explained above just to take that out of the equation as that will make her misfire in the same manner..
Yea , I wouldn't purchase Uneek or Globals unless I had no other alternative. You can end up compounding problems, either right away or in the near future. That can be a hair puller lol. I'd attempt a set of Visteon or Motorcraft first. I doubt you'll find Visteons for that engine, but you may find a set of Motorcrafts if your lucky. The next best bet would be Coils from Rock Auto. I really wouldn't chance Uneek or Global now a days. It's not worth the headaches and quite a few have ran into these problems in the past couple years. Like I said, I'd bite the bullet and get them from Rock if I had to.
It does sound like a coil problem. After a fresh KAM reset, they will run better for a time, then heads right back to misfiring. Thing is, a coil problem usually won't be evident at idle unless you have a dead cylinder (no fire at all) or close to it. With that, you should definitely get CEL.
Still, I'd check the EGR valve exactly as I explained above just to take that out of the equation as that will make her misfire in the same manner..
Yea , I wouldn't purchase Uneek or Globals unless I had no other alternative. You can end up compounding problems, either right away or in the near future. That can be a hair puller lol. I'd attempt a set of Visteon or Motorcraft first. I doubt you'll find Visteons for that engine, but you may find a set of Motorcrafts if your lucky. The next best bet would be Coils from Rock Auto. I really wouldn't chance Uneek or Global now a days. It's not worth the headaches and quite a few have ran into these problems in the past couple years. Like I said, I'd bite the bullet and get them from Rock if I had to.
Thread Starter
|
Member
Joined: Dec 2012
Posts: 19
Likes: 0
From: Ft. Lewis, WA
Actually it's a 32 valve engine, 4 per cylinder. So you need valve specific coils for that one.
Mine has a standard Triton 5.4L, not the Intek. My production date is 10/98, the Intek wasn't introduced until the later 99 models. I will gladly take a picture of my engine bay. It is the same motor I had in my 97 F-150.
It does sound like a coil problem. After a fresh KAM reset, they will run better for a time, then heads right back to misfiring. Thing is, a coil problem usually won't be evident at idle unless you have a dead cylinder (no fire at all) or close to it. With that, you should definitely get CEL.
Yeah he said he had a dead battery and just recently put another in so everything was reset. That was the thing surprised me was I got a lean code (P0174) but I didn't get a misfire code as it is OBVIOUSLY misfiring. Granted I did go to Autozone to get the codes read so it wouldn't surprise me if they missed one.
Still, I'd check the EGR valve exactly as I explained above just to take that out of the equation as that will make her misfire in the same manner..
Will do!
Yea , I wouldn't purchase Uneek or Globals unless I had no other alternative. You can end up compounding problems, either right away or in the near future. That can be a hair puller lol. I'd attempt a set of Visteon or Motorcraft first. I doubt you'll find Visteons for that engine, but you may find a set of Motorcrafts if your lucky. The next best bet would be Coils from Rock Auto. I really wouldn't chance Uneek or Global now a days. It's not worth the headaches and quite a few have ran into these problems in the past couple years. Like I said, I'd bite the bullet and get them from Rock if I had to.
I will look into these. Just hard to spend that when others are getting the same result with the cheaper brands.
Mine has a standard Triton 5.4L, not the Intek. My production date is 10/98, the Intek wasn't introduced until the later 99 models. I will gladly take a picture of my engine bay. It is the same motor I had in my 97 F-150.
It does sound like a coil problem. After a fresh KAM reset, they will run better for a time, then heads right back to misfiring. Thing is, a coil problem usually won't be evident at idle unless you have a dead cylinder (no fire at all) or close to it. With that, you should definitely get CEL.
Yeah he said he had a dead battery and just recently put another in so everything was reset. That was the thing surprised me was I got a lean code (P0174) but I didn't get a misfire code as it is OBVIOUSLY misfiring. Granted I did go to Autozone to get the codes read so it wouldn't surprise me if they missed one.
Still, I'd check the EGR valve exactly as I explained above just to take that out of the equation as that will make her misfire in the same manner..
Will do!
Yea , I wouldn't purchase Uneek or Globals unless I had no other alternative. You can end up compounding problems, either right away or in the near future. That can be a hair puller lol. I'd attempt a set of Visteon or Motorcraft first. I doubt you'll find Visteons for that engine, but you may find a set of Motorcrafts if your lucky. The next best bet would be Coils from Rock Auto. I really wouldn't chance Uneek or Global now a days. It's not worth the headaches and quite a few have ran into these problems in the past couple years. Like I said, I'd bite the bullet and get them from Rock if I had to.
I will look into these. Just hard to spend that when others are getting the same result with the cheaper brands.
Thread Starter
|
Member
Joined: Dec 2012
Posts: 19
Likes: 0
From: Ft. Lewis, WA
So I ran into an issue. Not sure where it came from but COP #2 had a weird spring in the boot (Motorcraft COP). Pretty sure it's not the one it is suppose to have (considering it didn't look like the others) so I ran out and got another boot and spring. I will post pictures when I am done of the spring. Still have 5-8 to do. I hate Ford right now though. LOL
Thread Starter
|
Member
Joined: Dec 2012
Posts: 19
Likes: 0
From: Ft. Lewis, WA
I ended up finding 4 more of these springs (all of bank 2), so now I am wondering if these aren't the stock COP, boot and spring?
Anyways, I replaced all the boots and springs that had that style spring, plugs, pcv, pcv elbows (little elbow junction directly off the pcv), fuel filter, cleaned IAC, IAT, MAF, new air filter and did a KAM reset. I did find a little moisture on the boots that I believe to be the stock ones, but not like a puddle. Not sure if that is from the old boots or what? The new ones seemed to sit a little bit tighter over the plug hole.
After all was said and done I started the truck let it warm up and took it for a drive and it ran like a champ! Figure I will drive it around for a couple of days and see if it comes back. Hopefully not. Thanks for the help and I will keep you all updated!
I think I may tackle my HVAC issue next.
Anyways, I replaced all the boots and springs that had that style spring, plugs, pcv, pcv elbows (little elbow junction directly off the pcv), fuel filter, cleaned IAC, IAT, MAF, new air filter and did a KAM reset. I did find a little moisture on the boots that I believe to be the stock ones, but not like a puddle. Not sure if that is from the old boots or what? The new ones seemed to sit a little bit tighter over the plug hole.
After all was said and done I started the truck let it warm up and took it for a drive and it ran like a champ! Figure I will drive it around for a couple of days and see if it comes back. Hopefully not. Thanks for the help and I will keep you all updated!
I think I may tackle my HVAC issue next.
Last edited by rydnlow; Dec 18, 2012 at 12:11 PM.