4.0 skip/misfire/bucking - Page 2 - 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
  #26  
Old 01-26-2009
OVERtheEDGE's Avatar
Member
Thread Starter
 
Join Date: Mar 2008
Location: locust grove georgia
Posts: 1,441
Quote:
Originally Posted by ramrezz425 View Post
I put on the new fuel filter, Cleaned the MAF and I still have the Bucking/skip stuff., From what I am reading here I need to deal with the EGR. I looked and looked but could not find it. The Delta valve is on the LH Fender is see the hoses from that point. There was a 9.5mm vacuum hose that goes to the air intake just behind the TPS and it was in preety bad shape(9 years old), so that has been replaced. I know what an egr looks like and am very familiar with them but i cant seem to find it. could it be under that coil pack thing?
Am i blind???
ill get you a pic. hard to explain. right side of the motor when you looking under the hood, above the manifold, its a round thing w/ something pluged in the middle.
Reply With Quote
  #27  
Old 01-26-2009
Downey's Avatar
RF Veteran
iTrader: (1)
 
Join Date: Oct 2007
Location: Muncy, PA
Posts: 8,470
sounds like everyone has covered everything cant help to much sry
Reply With Quote
  #28  
Old 01-27-2009
Member
 
Join Date: Nov 2005
Location: Elizabeth City, NC
Posts: 767
By far, the most replaced part in the EGR system is the DPFE (use Search). I only posted to this thread because my 3.0 has suffered this exact bucking symptom. I can predict when my DPFE is going bad, long before the CEL lights, w/ P0401. I think I'm running #4 DPFE now on my 2000. (I drive 32 mph on Cruise for two miles every day in 4th gear - that bucking is so bad, I'll disconnect the EGR valve until I get a new DPFE to fix it) I'll be standing by for a certain "auto tech" to tell me "EARL your an IDIOT", and "all this sensor does is monitor exhaust flow, it is NOT A OUTPUT solenoid or motor thus is has no affect on how the engine runs!" (pasted from a rude PM, lol).

There is also an EGR solenoid which controls the vacuum TO the egr valve, causing it to open/close. The EGR valve itself is RARELY bad, but there is a check you can perform. Apply vaccum to the egr valve and see if it holds.
http://www.tomco-inc.com/techinfo.aspx Look around there, lots of good info.

You should also inspect the hoses to the DPFE for cracks, etc. Get replacement tubing from FORD, sold by the foot. Pricey, but worth it. They are different sizes, so make sure to connect them properly.
Reply With Quote
  #29  
Old 01-27-2009
Ford04Ranger4.0's Avatar
Member
 
Join Date: Dec 2008
Location: Plattsburgh, New York
Posts: 3,390
so all you did was unplug your EGR and that fixed it??
Reply With Quote
  #30  
Old 01-27-2009
Level III Supporter
iTrader: (2)
 
Join Date: Jun 2004
Location: usa
Posts: 24,936
I had a similar problem with mine it was a random miss fire it turned out to be the coil pack and it had also fouled out #4 plug
Reply With Quote
  #31  
Old 01-27-2009
OVERtheEDGE's Avatar
Member
Thread Starter
 
Join Date: Mar 2008
Location: locust grove georgia
Posts: 1,441
so i need to replace vacume lines or what?
Reply With Quote
  #32  
Old 01-27-2009
crazymikey's Avatar
Member
iTrader: (2)
 
Join Date: Nov 2008
Location: your mom
Posts: 4,008
I just cleaned my MAF and put in a new filter and mine seems to be okay now.
Reply With Quote
  #33  
Old 01-28-2009
OVERtheEDGE's Avatar
Member
Thread Starter
 
Join Date: Mar 2008
Location: locust grove georgia
Posts: 1,441
bump
what do i need to do to fix my EGR problem?
Reply With Quote
  #34  
Old 01-28-2009
chainfire's Avatar
Member
iTrader: (1)
 
Join Date: Oct 2007
Location: Mission B.C.
Posts: 3,126
I would create your own thread, you'll get alot more hits and views that way
Reply With Quote
  #35  
Old 01-29-2009
OVERtheEDGE's Avatar
Member
Thread Starter
 
Join Date: Mar 2008
Location: locust grove georgia
Posts: 1,441
Quote:
Originally Posted by chainfire View Post
I would create your own thread, you'll get alot more hits and views that way
this is my thread!
Reply With Quote
  #36  
Old 01-29-2009
chainfire's Avatar
Member
iTrader: (1)
 
Join Date: Oct 2007
Location: Mission B.C.
Posts: 3,126
oooo **** sorry lol
it was a long day at work
Reply With Quote
  #37  
Old 01-29-2009
Member
 
Join Date: Nov 2005
Location: Elizabeth City, NC
Posts: 767
Hi Matt.

When mine (3.0) acted like yours, I replaced the DPFE (even without a code) and got rid of the annoying "trailer-hitching".

However, the hoses to it could be bad, so inspect them before you drop the $54.

The Tomco site I linked to gives a lot of troubleshooting for EGR.
Reply With Quote
  #38  
Old 01-29-2009
OVERtheEDGE's Avatar
Member
Thread Starter
 
Join Date: Mar 2008
Location: locust grove georgia
Posts: 1,441
Quote:
Originally Posted by chainfire View Post
oooo **** sorry lol
it was a long day at work
lol its all good
Reply With Quote
  #39  
Old 01-29-2009
OVERtheEDGE's Avatar
Member
Thread Starter
 
Join Date: Mar 2008
Location: locust grove georgia
Posts: 1,441
Quote:
Originally Posted by Earl43P View Post
Hi Matt.

When mine (3.0) acted like yours, I replaced the DPFE (even without a code) and got rid of the annoying "trailer-hitching".

However, the hoses to it could be bad, so inspect them before you drop the $54.

The Tomco site I linked to gives a lot of troubleshooting for EGR.
what exactly is the DPFE?
and i looked around at all the little colored hoses that went to it and they looked ok to me. i will look again though and after that i'll have friend check over too.
Reply With Quote
  #40  
Old 01-29-2009
chainfire's Avatar
Member
iTrader: (1)
 
Join Date: Oct 2007
Location: Mission B.C.
Posts: 3,126
Check both ends of the hoses, and underneath where you cannot see. If you rub them, and bits and pieces of the hose come off, replace them, they are no longer any good.
Reply With Quote
  #41  
Old 01-29-2009
OVERtheEDGE's Avatar
Member
Thread Starter
 
Join Date: Mar 2008
Location: locust grove georgia
Posts: 1,441
Quote:
Originally Posted by chainfire View Post
Check both ends of the hoses, and underneath where you cannot see. If you rub them, and bits and pieces of the hose come off, replace them, they are no longer any good.
k, ill do that now.
Reply With Quote
  #42  
Old 01-31-2009
OVERtheEDGE's Avatar
Member
Thread Starter
 
Join Date: Mar 2008
Location: locust grove georgia
Posts: 1,441
i think i found my problem. dry rotted vacume lines.
Reply With Quote
  #43  
Old 02-03-2009
Member
 
Join Date: Oct 2008
Location: Whittier, CA
Posts: 34
4.0 here. I have no EGR!!!

Unless it looks different I cannot find the damn thing. I am still experiencing bucking, All vacuum lines are new. There is a hose the attaches to the intake just behing the TPS. and goes to an evap system located on the left fender well. but thats all. any suggestions to stop the bucking? I read the other threads already but none of that stuff applies. thanks dr
Reply With Quote
  #44  
Old 02-03-2009
Member
 
Join Date: Nov 2005
Location: Elizabeth City, NC
Posts: 767
David, 99 4.0 may not have EGR; I KNOW the 2000 4.0 doesn't.

Have you looked at the spark plugs yet? May be bad plug wires (mist them at night, look for arcing).
Reply With Quote
  #45  
Old 02-03-2009
OVERtheEDGE's Avatar
Member
Thread Starter
 
Join Date: Mar 2008
Location: locust grove georgia
Posts: 1,441
pretty sure all the ohv engines have it
Reply With Quote
  #46  
Old 02-05-2009
Biz's Avatar
Biz Biz is offline
Member
 
Join Date: Sep 2006
Location: los angeles,California
Posts: 2,120
mine does this crap too..I dont know what it is!..i changed spark plug wires and thats about it!...solve the bucking and wiered idle probelms already so i know what my problem is lol
Reply With Quote
  #47  
Old 02-05-2009
Member
 
Join Date: Oct 2008
Location: Whittier, CA
Posts: 34
Quote:
Originally Posted by Earl43P View Post
David, 99 4.0 may not have EGR; I KNOW the 2000 4.0 doesn't.

Have you looked at the spark plugs yet? May be bad plug wires (mist them at night, look for arcing).
plugs and wires are all new.
Reply With Quote
  #48  
Old 02-15-2009
Biz's Avatar
Biz Biz is offline
Member
 
Join Date: Sep 2006
Location: los angeles,California
Posts: 2,120
any luck on the bucking?...mine is still doing it..
Reply With Quote
  #49  
Old 02-16-2009
Member
 
Join Date: Oct 2008
Location: Whittier, CA
Posts: 34
Gap your plugs to .054

Quote:
Originally Posted by Biz View Post
any luck on the bucking?...mine is still doing it..
See my thread, .054 whats your gap?

I put a 2nd new set of plugz (motorcraft Plats.) and regapped to .054

I have no more bucking whatso ever. btw, I also changed the IAC solonoid, wires, cleaned the MAF with contact cleaner and replaced the lower evap hoses located right behind the TPS.
Reply With Quote
  #50  
Old 02-16-2009
OVERtheEDGE's Avatar
Member
Thread Starter
 
Join Date: Mar 2008
Location: locust grove georgia
Posts: 1,441
Quote:
Originally Posted by ramrezz425 View Post
See my thread, .054 whats your gap?

I put a 2nd new set of plugz (motorcraft Plats.) and regapped to .054

I have no more bucking whatso ever. btw, I also changed the IAC solonoid, wires, cleaned the MAF with contact cleaner and replaced the lower evap hoses located right behind the TPS.
mine stoped. it was the egr but u havent fixed it. its just unpluged till i but vacume lines or get a new one
Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
95 Ranger with bad skip, running on 5 cylinders ForderTJP 4.0L OHV & SOHC V6 Tech 7 06-14-2015 05:14 AM
engine misfire? bucking 48bronco 4.0L OHV & SOHC V6 Tech 3 12-03-2014 09:07 AM
93 Ranger Skip or Surge ?? HELP Swifgriff General Ford Ranger Discussion 5 04-10-2011 06:53 AM
Skip shift? wydopnthrtl Drivetrain Tech 4 12-03-2006 02:35 PM
skip plate bryanjints Fabrication & Tool Tech 2 03-05-2006 11:14 AM


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 08:45 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.