Problems Rears its Ugly Head Again - Ranger-Forums - The Ultimate Ford Ranger Resource


4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

Reply
 
LinkBack Thread Tools Search this Thread
  #1  
Old 09-21-2011
jtfoxman's Avatar
Member
Thread Starter
 
Join Date: Jun 2005
Location: The Poconos
Posts: 891
Problems Rears its Ugly Head Again

Been having this issue off & on again for a few years now. When I start the truck up it idles very rough. While driving around town or giving it gas it rides fine. I'll stop at a stop light and it will start stumbling. Idle starts at 600 and drop to 400 over and over again. While pulling away it will hesitate. Also while driving down the road it seems like it misses and it will start to hesitate and shake back and forth sort of like a bucking until i give it more gas. Sometimes it runs great but I always have the start up idle issue.
This started happening when I ran my fuel tank down pretty low and I thought I may have got some dirty fuel in there. So I dumped some IsoHeet, fuel Injection cleaner and the fuel cleaner from Ford, not sure what it is called. Got a bit better. Pulled the plugs and they seem fine, replaced last year. Cleaned MAF, new IAC, cleaned throttle body, checked intake bolts and vacuum lines. No codes besides for my 1445 emission code which I've had for 10yrs now. Checked fuel pressure at rail and it is 36 w/key on and 28 at idle. Also changed tranny fluid and filter since it was about time.
I'm changing back to the motorcraft plugs, wires and fuel filter this weekend. Anything else I should check for? Thanks!
Reply With Quote
  #2  
Old 09-21-2011
04RangerDave's Avatar
JDM> RANGER

iTrader: (3)
 
Join Date: Jul 2010
Location: RI
Posts: 5,030
Wirelessly posted

I think the fuel psi spec is 44-50
Reply With Quote
  #3  
Old 09-21-2011
jtfoxman's Avatar
Member
Thread Starter
 
Join Date: Jun 2005
Location: The Poconos
Posts: 891
Haynes manual says:
35-45 key on
25-35 @ idle
Reply With Quote
  #4  
Old 09-21-2011
Timberwolf's Avatar
Member
 
Join Date: Oct 2010
Location: East coast Canada
Posts: 706
fuel filter?
Reply With Quote
  #5  
Old 09-21-2011
jtfoxman's Avatar
Member
Thread Starter
 
Join Date: Jun 2005
Location: The Poconos
Posts: 891
Quote:
Originally Posted by Timberwolf View Post
fuel filter?


Going to change that this weekend along with the plugs and wires.
Reply With Quote
  #6  
Old 09-21-2011
04RangerDave's Avatar
JDM> RANGER

iTrader: (3)
 
Join Date: Jul 2010
Location: RI
Posts: 5,030
Attached Thumbnails
Problems Rears its Ugly Head Again-2nw287k.jpg  
Reply With Quote
  #7  
Old 09-21-2011
jtfoxman's Avatar
Member
Thread Starter
 
Join Date: Jun 2005
Location: The Poconos
Posts: 891
So both of my numbers do fall within range. A bit on the low side at idle but still within range. Don't think that would cause the issue, but you never know.
Reply With Quote
  #8  
Old 09-21-2011
StxDangerRanger's Avatar
RF Veteran
iTrader: (2)
 
Join Date: Dec 2010
Location: Flat Rock, Mi
Posts: 6,313
Its not fuel pressure if it stumbles only occasionally. Check out the IAC again. MAF also.
maybe EGR or PCV could do that too.
Reply With Quote
  #9  
Old 09-21-2011
fourliter dan's Avatar
Member
 
Join Date: Dec 2007
Location: Lebanon, OR
Posts: 2,229
possible the pump picked a piece up in the sceen its self, but unlickly it would cause that much. i would bet fuel filter. cheapest part to start with aside the pcv, but i doubt its that
Reply With Quote
  #10  
Old 09-22-2011
jtfoxman's Avatar
Member
Thread Starter
 
Join Date: Jun 2005
Location: The Poconos
Posts: 891
I'll be checking everything out tomorrow. I'll report back. Not sure on how to check EGR though. DFPE is only about 6months old. EGR valve and O2 sensors are original w/ 110,000 miles.
Reply With Quote
  #11  
Old 09-22-2011
leadfoot's Avatar
Member
 
Join Date: Oct 2007
Location: MA
Posts: 894
Probably of no help but when my gas cap was not attached I experienced the same problem, no codes either. I reset the ecu and put the gas cap on tightly which fixed the problem. Never would have thought a gas cap would do that. I still have missing under high load but that is another issue.
Reply With Quote
  #12  
Old 09-23-2011
jtfoxman's Avatar
Member
Thread Starter
 
Join Date: Jun 2005
Location: The Poconos
Posts: 891
My crappy day rant so far.
Started off with a Seafoam treatment. Went well. This brought the construction crew from up the alley out to watch the smoke show.
Started to change the oil. First off they do not make Valvoline Max life synthetic blend anymore so I went with Motorcraft blend. Is this oil ok? Drained and then tried to get the filter off. Well it will not budge. Last time I let the shop change it since it was in for an inspection anyway. 6hrs later later it is still not off but it is filled with holes from the old screwdriver method since I do not have a filter wrench since i never needed one, cause i hand tighten like your supposed to not freaking torque it on like they did.
So I took a break and went over to the fuel filter. Relieved the pressure and noticed the little flap in the fuel filler neck does not close anymore. Stuck in the open position. Not sure if it happened the last time I filled it of if someone tried to siphon fuel. Tried to pry it back but no luck. Is it ok to leave it like this? Got the one side off but can't get the other side off with the plastic tool. Not sure if it is 5/16 or 3/8, anyone know? It worked fine the last time but I can't remember which size I used.Well 5hrs later and still not off. Plus i got the good old fuel bath. Thankfully I wear my shop jump suit and safety glasses. But I'm still screwed.
So now I jumped to the plugs and wires. Went great but the plugs were all covered in carbon and oil. Could this be caused by the seafoam treatment? I checked them the other day and they were ok. Nice new Motorcraft plugs and wires. Can't check them since there is no dang oil or fuel in the truck.
Now I moved on to cleaning the MAF, IAC , etc, changing pcv and air filter. All this went well. I actually thanked GOD for this.
I'm stuck though now with a damn stuck oil filter and a fuel filter I cant get off.
Any suggestions guys and gals?

Last edited by jtfoxman; 09-23-2011 at 06:17 PM. Reason: Addition
Reply With Quote
  #13  
Old 09-23-2011
jtfoxman's Avatar
Member
Thread Starter
 
Join Date: Jun 2005
Location: The Poconos
Posts: 891
Took a little break and finally got the fuel filter off. In 2 minutes. Why couldn't this have happened earlier. Was a piece of cake this time.

Up next! Oil filter. This will be fun.

Last edited by jtfoxman; 09-23-2011 at 10:18 PM. Reason: addition
Reply With Quote
  #14  
Old 09-24-2011
04RangerDave's Avatar
JDM> RANGER

iTrader: (3)
 
Join Date: Jul 2010
Location: RI
Posts: 5,030
Do you have a big pair of channel locks for the filter. If not you need a pair of these 100% Silicone so heat isnt an issue and like it says they grip mad.
Attached Thumbnails
Problems Rears its Ugly Head Again-img_2864.jpg   Problems Rears its Ugly Head Again-img_5851.jpg  
Reply With Quote
  #15  
Old 09-24-2011
jtfoxman's Avatar
Member
Thread Starter
 
Join Date: Jun 2005
Location: The Poconos
Posts: 891
Quote:
Originally Posted by 04RangerDave View Post
Do you have a big pair of channel locks for the filter. If not you need a pair of these 100% Silicone so heat isnt an issue and like it says they grip mad.
I have a pair like that but no luck. The filter is in a bad location where I really couldn't get both hands on it.

I finally went out and purchased a filter tool. The 3 jar kind and a end cap one that u use a 3/8 ratchet with them. End cap would not work due to the filter being so deformed from me trying so hard. The 3 jaw filter removal worked great! That filter was on there so tight even with the ratchet it was a pain. The seal on the filter had a huge indention in it from being so tight.

After I got it changed and refilled i started the truck up. Took a couple tries since I changed the fuel filter but it fired up nice. Took it for a ride and had no issues. I think the issue may be solved. Still concerned with the oil/carbon covered plugs after the seafoam though and the fuel filler flap.

After all the work yesterday my left hand is now tingling from a bit of carpal tunnel. But some beer should take care of that.

Last edited by jtfoxman; 09-24-2011 at 07:50 PM. Reason: spelling
Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Swaping rears and motors mudsluts New Ideas 6 07-04-2010 10:51 PM
Brake Help!!!!....my rears arent working... t5cents Drivetrain Tech 15 02-08-2010 10:01 AM
Its Official its done... Redneckstone General Ford Ranger Discussion 48 05-10-2008 10:46 PM
taking out rears, using factory deck to power tweets? Bhavesh Audio & Video Tech 8 10-14-2006 02:59 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -6. The time now is 06:51 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.