Go Back   Ford Truck Enthusiasts Forums > Super Duty/Heavy Duty > Super Duty & Heavy Duty
Sign in using an external account
Register Forgot Password?


Super Duty & Heavy Duty 1999 to current Ford F250, F350, F450 and F550 Super Duty with diesel V8 and gas V8 and V10 engines SPONSORED BY:

Welcome to Ford-Trucks Forums!
Welcome to Ford-Trucks.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the Ford-Trucks Forums community today!





 
Reply
 
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 12-27-2012, 12:36 PM
Jmoen7 Jmoen7 is offline
Senior User
 
Join Date: Oct 2012
Location: Kenora, Ontario
Posts: 307
Jmoen7 is starting off with a positive reputation.
1999 F250 v10 idle surge

This is what i know so far, not that these may cause this issue, but im new to vehicles in general:

Visible exhaust leaks from the headers and manifold

I have cleaned the IAC, MAF and throttle body
Also has a k&n air filter and have took out auto locking hubs for manual

I cannot figure out what would cause an idle "surge" that almost sounds like a lope, but in a gasser. here's a video:

https://www.youtube.com/watch?v=u3chsaL3jGk
Reply With Quote
  #2  
Old 12-27-2012, 01:19 PM
tawells01's Avatar
tawells01 tawells01 is offline
Senior User
 
Join Date: Sep 2009
Location: Colorado
Posts: 117
tawells01 is starting off with a positive reputation.
Based on the sound, one possibility is a stuck EGR valve (I believe I saw one on the the video). This does tend to get over diagnosed, but my 5.4L had a similar surge recently and the EGR valve was stuck open.

How is it when you are driving?
__________________
1999 F250SD SC LB XLT 5.4L 4x4-Off Road auto 4:10
1988 F150 SC SB XLT Lariat 4.9L 4x4 5-speed 3:55

"Anyone who has never made a mistake has never tried anything new."
Albert Einstein
Reply With Quote
  #3  
Old 12-27-2012, 05:33 PM
Jmoen7 Jmoen7 is offline
Senior User
 
Join Date: Oct 2012
Location: Kenora, Ontario
Posts: 307
Jmoen7 is starting off with a positive reputation.
It depends on if i let it fully warm up or not, if i just start and let it semi-warm up it drives fine unless it's idling down when comming to a stop, it will surge. But if i let it warm up, it takes 30 seconds of driving of it surging while accelerating aswell about the same pace as you heard my exhaust
Reply With Quote
  #4  
Old 12-27-2012, 06:40 PM
tawells01's Avatar
tawells01 tawells01 is offline
Senior User
 
Join Date: Sep 2009
Location: Colorado
Posts: 117
tawells01 is starting off with a positive reputation.
The other two times I had surging at Idle with hesitation upon acceleration it was: (1) The vacuum line to the fuel pressure regulator was chewed through by a rabbit. (2) A crack in the elbow that connects the hose from the air intake to the back of the intake manifold.
__________________
1999 F250SD SC LB XLT 5.4L 4x4-Off Road auto 4:10
1988 F150 SC SB XLT Lariat 4.9L 4x4 5-speed 3:55

"Anyone who has never made a mistake has never tried anything new."
Albert Einstein
Reply With Quote
  #5  
Old 12-27-2012, 07:03 PM
Jmoen7 Jmoen7 is offline
Senior User
 
Join Date: Oct 2012
Location: Kenora, Ontario
Posts: 307
Jmoen7 is starting off with a positive reputation.
Okay so checklist, EGR, vacuum line to the fuel pressure regulator.
I have felt around the elbow for any crack with air coming out and i havent felt/seen anyt on that.
If my egr is stuck, how do i go about checking that? and do i need a new one or can it be cleaned.
And do you have a picture to show me where the vacuum line to the FPR is?
Reply With Quote
  #6  
Old 12-27-2012, 08:01 PM
tawells01's Avatar
tawells01 tawells01 is offline
Senior User
 
Join Date: Sep 2009
Location: Colorado
Posts: 117
tawells01 is starting off with a positive reputation.
Is your check engine light on? Any codes?

I would check all the vacuum lines for cracks and proper connection not just the two I mentioned before.

If the egr valve is stuck open you can some time tap it and it will close. One way of testing it is to connect a hand vacuum pump to it in place of the vacuum line and slowly apply a vacuum (with the engine at idle). A plastic syringe (35 ml) and a small piece of tubing can be used in place of the vacuum pump. If the valve was closed initially and and opens under vacuum the idle should change. The engine will noticeably stumble. If you get no change, then either the valve is faulty or there is a blockage in the egr tube.

You can clean both the egr valve with carborator/throttle body cleaner. Sometimes this restores function.

Your DPFE could also be faulty or the line leading to it could be plugged.

Another possibility is if you have a visible exhaust leak this could be allowing air in to the exhaust causing the oxygen sensors to give incorrect readings.

There are several possibilities so it would be helpful to no if it has thrown any codes or if there are any pending.
__________________
1999 F250SD SC LB XLT 5.4L 4x4-Off Road auto 4:10
1988 F150 SC SB XLT Lariat 4.9L 4x4 5-speed 3:55

"Anyone who has never made a mistake has never tried anything new."
Albert Einstein
Reply With Quote
  #7  
Old 12-27-2012, 08:29 PM
Jmoen7 Jmoen7 is offline
Senior User
 
Join Date: Oct 2012
Location: Kenora, Ontario
Posts: 307
Jmoen7 is starting off with a positive reputation.
From the 3 times i've checked for codes, it only threw a IACV code, so i cleaned that out and put it back on, and checked twice more with no codes at all.
The visible leak is where the headers meet the manifold, there are a few more but those are past the o2 sensors and shouldnt be a bother right?

Ill try tapping on the egr, along with hand pumping it at idle tomorrow. But i won't be able to check vacuum lines for some time since it drops to -25 here and i have no access to a heated garage
Reply With Quote
  #8  
Old 12-27-2012, 10:09 PM
Zedrive's Avatar
Zedrive Zedrive is offline
Senior User
 
Join Date: Mar 2008
Location: Maple Ridge, Canada
Posts: 335
Zedrive is gaining momentum as a positive member of FTE.
The thick line that bends off to the right goes to the brake booster.
The fitting below that hose is the FPR vacuum line connnection.
I hope this helps.
http://i1164.photobucket.com/albums/...psb94bfc5c.jpg
__________________
''Keep your words soft and sweet for some day, you may have to eat them'' - Confusius

99 f250 SD, XLT, 4X, LB, 6.8L, ZF5, 4L30 gears 185,000 miles
Reply With Quote
  #9  
Old 12-27-2012, 10:24 PM
SasquatchZilla's Avatar
SasquatchZilla SasquatchZilla is offline
Elder User
 
Join Date: Dec 2011
Location: Brownsville, OR
Posts: 886
SasquatchZilla is gaining momentum as a positive member of FTE.SasquatchZilla is gaining momentum as a positive member of FTE.
Derek Garletts
I believe you said that you recently switched to manual hubs?

Did you properly cap the vacuum lines that supply them? Both EGR and vacuum leaks can cause this. Any stalling issues? You can use a can of starting fluid (be extremely careful!!!) to find the leaks. Unfortunately most auto store code readers won't check the function or the specs at which a switch or solenoid or sensor is operating at. Also make sure your ac is off. When the ac kicks on it'll make the rpm change. The best thing to do is to unplug the clutch so you know for certain isn't kicking in.

On a side note. I'd pull the nipples on the hubs for the vacuum supply and install 1/8 npt plugs there instead. I recently rebuilt my front in and the po had done the switch already. Unfortunately the rubber vacuum caps he installed on the hub nipples rotted and allowed moisture into the hub. Not his mistake, just those black rubber plugs tend to do that. I use the silicone ones instead now.
__________________
If it's unbreakable, I can find a way to break it.
Derek aka "Sasquatch"
Reply With Quote
  #10  
Old 12-27-2012, 11:06 PM
tawells01's Avatar
tawells01 tawells01 is offline
Senior User
 
Join Date: Sep 2009
Location: Colorado
Posts: 117
tawells01 is starting off with a positive reputation.
I would lean towards egr or vacuum leak or the IAC is faulty. Cleaning it doesn't always work. Definitely check that the vacuum lines to the hubs were capped off when you switched to manual hubs as SasquatchZilla.

I assume the IAC code was P0505 (possibly p1507 or p1505). In addition to dirty or damaged IAC valve assembly, this code can be thrown as a result of:
Air intake leaks or restrictions
Vacuum leaks
Loose or damaged throttle body
Faulty EGR valve or gasket
Faulty PCV valve or hose
Faulty Powertrain Control Module
__________________
1999 F250SD SC LB XLT 5.4L 4x4-Off Road auto 4:10
1988 F150 SC SB XLT Lariat 4.9L 4x4 5-speed 3:55

"Anyone who has never made a mistake has never tried anything new."
Albert Einstein
Reply With Quote
  #11  
Old 12-27-2012, 11:06 PM
biz4two's Avatar
biz4two biz4two is offline
Post Fiend
 
Join Date: Sep 2003
Location: Albuquerque
Posts: 5,237
biz4two has a great reputation on FTE.biz4two has a great reputation on FTE.biz4two has a great reputation on FTE.biz4two has a great reputation on FTE.
Arrow

Quote:
Originally Posted by Jmoen7 View Post
I have felt around the elbow for any crack with air coming out and i havent felt/seen anyt on that.

Feeling is not good enough. Try using CARB cleaner and spray around suspected area of intake manifold.

Plus...IMHO...the IAC really should be replaced...and not cleaned. Just my experience...


biz
__________________

2012 FORD F250 SD CC 156" Lariat FX4 6.2L BOSS 4x4 4.30s
2003 F250 SD SC 142" XLT FX4 V10 Auto 4x4 3.73s -- Traded
1976 F150 LWB Custom 4x4 390FE NP435 3.50s
Reply With Quote
  #12  
Old 12-27-2012, 11:52 PM
Jmoen7 Jmoen7 is offline
Senior User
 
Join Date: Oct 2012
Location: Kenora, Ontario
Posts: 307
Jmoen7 is starting off with a positive reputation.
@Zedrive Thank you for the picture, i'll be looking at it tomorrow!

@Sasquatchzilla I'm not 100% sure, i'm a 3rd owner, and the 2nd owner was the one to switch over to manual hubs. For stalling issues, yes, it would stall when going into reverse 90% of the time, but to avoid this i turned the idle up for now. And it's weird, from what i see, the AC is plugged in, backwards? i'll have a picture tomorrow as it is dark if you need it. And for the nipples, i think there is just a cap on them, does that sound like something that would work?

@tawells01 The code was P1504 (Idle Air Control Circuit Malfunction) does that change anything?

@biz4two Thanks! Yes, i know it was just a quick feel around for major cracks, and i'll have a IAC ordered tomorrow
Reply With Quote
  #13  
Old 12-28-2012, 12:33 AM
tawells01's Avatar
tawells01 tawells01 is offline
Senior User
 
Join Date: Sep 2009
Location: Colorado
Posts: 117
tawells01 is starting off with a positive reputation.
This DTC is set when electrical load failure on the IAC output circuit is detected.

IAC circuit open
VPWR to IAC solenoid open
IAC circuit short to PWR
IAC circuit short to GND
Damaged IAC valve
Damaged PCM
__________________
1999 F250SD SC LB XLT 5.4L 4x4-Off Road auto 4:10
1988 F150 SC SB XLT Lariat 4.9L 4x4 5-speed 3:55

"Anyone who has never made a mistake has never tried anything new."
Albert Einstein
Reply With Quote
  #14  
Old 12-28-2012, 09:10 AM
Jmoen7 Jmoen7 is offline
Senior User
 
Join Date: Oct 2012
Location: Kenora, Ontario
Posts: 307
Jmoen7 is starting off with a positive reputation.
By the sounds of it, i may have a few connected problems to make it idle this way, if it was electrical on the IAC, don't you think it would be always pulling P1504? i only got it to happen once, and when it happened, i was cruising 110 KMH and floored it and it popped up to 4000 RPM or so and the CEL came on and that was the code i got

But im going to be ordering a new IAC today regardless, relatively cheap at 70$
Reply With Quote
Old 12-28-2012, 09:10 AM
 
 
 
Reply

Go Back   Ford Truck Enthusiasts Forums > Super Duty/Heavy Duty > Super Duty & Heavy Duty

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
1999 F350 diesel with Surging issues Rodneys Super Duty & Heavy Duty 3 01-03-2013 07:50 PM
Surging at idle cory5517 1999 - 2003 7.3L Power Stroke Diesel 9 10-13-2012 08:55 AM
What would cause surging idle? Blue Rebel Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W) 3 01-14-2012 07:20 PM
Why does idle surge? bush1112 1987 - 1996 F150 & Larger F-Series Trucks 14 01-11-2004 03:27 AM
94 Ranger Surge at Idle Problem klokwerks Ranger & B-Series 1 07-09-2001 09:47 AM



All times are GMT -5. The time now is 10:32 AM.


Powered by vBulletin® Version 3.8.7 AC1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Advertising - Terms of Use - Privacy Statement - Jobs
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup