Go Back   Ford Truck Enthusiasts Forums > Diesel > 1999 - 2003 7.3L Power Stroke Diesel
Sign in using an external account
Register Forgot Password?


1999 - 2003 7.3L Power Stroke Diesel SPONSORED BY:

Reply
 
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 07-19-2014, 03:19 PM
HungOverSheep HungOverSheep is offline
New User
 
Join Date: Mar 2014
Posts: 16
HungOverSheep is starting off with a positive reputation.
99 7.3L Cylinder Misfire

Hello FTE,

I have a 1999 Ford F250 with 206000 and the 7.3L engine in it; this is my first diesel truck and I am working my way to make her run just like she was when she rolled off the assembly line 15 years ago. I just got the truck back from the shop with a fresh front end, I would have done all the work myself but I did not have the time to do so. The mechanic mentioned a bad misfire that was very consistent on the entire rpm range. I thought the truck was not running exactly right the day I bought it but I had no other experience with the f250 models. The truck seems weak until 2,000 rpms and then the pull of the turbo makes up for the missing (and I am sure the computer is compensating.) Through this handy site I have performed a few tests on the UVCH connections and the results were normal with exception of one glow plug:

Driver side test between "I" and "C":

3.4 ohms
3.3 ohms
3.3 ohms
3.4 ohms

Driver side test between "G" and battery ground:
0.8 ohms
1.4 ohms
1.0 ohms
0.8 ohms

Passenger side test between "I" and "C":

3.5 ohms
3.7 ohms
3.3 ohms
3.6 ohms

Passenger side test between "G" and battery ground: (also what the ??)


Infinity (open) (I know this is a bad glow plug)
0.9 ohms
0.9 ohms
0.9 ohms

I do not have access to a scan tool to perform the injector tests mentioned in plenty of these posts. Is anyone in the Tennessee area that might have access to one the scanners? http://images.ford-trucks.com/forums.../happy0161.gif

Secondly, I made my own boost tester gauge and found a boost leak in what I believe is called the Intake manifold cover. Is there some sort of gasket I need to replace? Picture should be attached or in this post ( I am a complete posting newbie).


Click the image to open in full size.



This is NOT my truck engine, I have a boost leak in between the block and the part I have arrows pointing to. What is this part and is there a gasket for it?
Reply With Quote
  #2  
Old 07-19-2014, 03:52 PM
Christof13T's Avatar
Christof13T Christof13T is online now
The Dr. will see you now!
 
Join Date: Apr 2012
Location: Victoria, Tx
Posts: 2,451
Christof13T has much to be proud ofChristof13T has much to be proud ofChristof13T has much to be proud ofChristof13T has much to be proud ofChristof13T has much to be proud ofChristof13T has much to be proud ofChristof13T has much to be proud ofChristof13T has much to be proud ofChristof13T has much to be proud ofChristof13T has much to be proud of
christof13t
No gasket. Go to ford and get a tube of the grey goo sealant.
Pull the plenums...
Clean all the old stuff off them, and the block.
Try and keep as much out of the intake as possible.

Clean with acetone.

Apply a 1/8 to 1/4 inch bead of the sealant on the plenums 1 at a time and reinstall.
Let it set for a good 12 hours (24 to be on the safe side)
__________________
Chris-PAA#130
Motorbug:2000 F350 Lariat CC,LB,6x6 7.3DIT,4" Turbo-Back, IH Bellowed Uppies, RiffRaff FRx&AIH Delete, Hutch/Harpoon,6637, 05-07facelift, dual cowl induction hood, Glowshift Max Tow gauges, antique BullyDog 1 Toon chip, 10k, Air Lift on rear axle, All the hitches!
420k & counting AE Total Ford Enhanced Bundle
Reply With Quote
  #3  
Old 07-19-2014, 04:30 PM
HungOverSheep HungOverSheep is offline
New User
 
Join Date: Mar 2014
Posts: 16
HungOverSheep is starting off with a positive reputation.
Thank you for the reply, I will do that sometime soon. Does the turbo need to come off in order to remove them? Any clue on the missing?
Reply With Quote
  #4  
Old 07-20-2014, 11:48 AM
HungOverSheep HungOverSheep is offline
New User
 
Join Date: Mar 2014
Posts: 16
HungOverSheep is starting off with a positive reputation.
Anyone else have any suggestions?
Reply With Quote
  #5  
Old 07-20-2014, 02:48 PM
Christof13T's Avatar
Christof13T Christof13T is online now
The Dr. will see you now!
 
Join Date: Apr 2012
Location: Victoria, Tx
Posts: 2,451
Christof13T has much to be proud ofChristof13T has much to be proud ofChristof13T has much to be proud ofChristof13T has much to be proud ofChristof13T has much to be proud ofChristof13T has much to be proud ofChristof13T has much to be proud ofChristof13T has much to be proud ofChristof13T has much to be proud ofChristof13T has much to be proud of
christof13t
To properly diagnose the miss you are going to need a scanner capable of talking to these trucks.

AutoEnginuity, torque obd pro, ngstar, etc.

Im not sure torque is capable of initiating buzz, and cct testing...

Buzz test the injectors.
Run a cylinder contribution test
Compression test the engine.

In popping the valve covers you might discover your problem visually by noticing a broken rocker arm, or bent pushrod...

Sometimes its that simple.
__________________
Chris-PAA#130
Motorbug:2000 F350 Lariat CC,LB,6x6 7.3DIT,4" Turbo-Back, IH Bellowed Uppies, RiffRaff FRx&AIH Delete, Hutch/Harpoon,6637, 05-07facelift, dual cowl induction hood, Glowshift Max Tow gauges, antique BullyDog 1 Toon chip, 10k, Air Lift on rear axle, All the hitches!
420k & counting AE Total Ford Enhanced Bundle
Reply With Quote
  #6  
Old 07-20-2014, 03:27 PM
HungOverSheep HungOverSheep is offline
New User
 
Join Date: Mar 2014
Posts: 16
HungOverSheep is starting off with a positive reputation.
I think I have a buddy lined up to scan the truck for $40 bucks. If I did have a bent rocker arm or valve wouldn't the engine be running a lot worse? I am hoping that it isn't a compression issue, I just bought this truck.
Reply With Quote
  #7  
Old 07-20-2014, 07:51 PM
HungOverSheep HungOverSheep is offline
New User
 
Join Date: Mar 2014
Posts: 16
HungOverSheep is starting off with a positive reputation.
Is this a normal amount of blow by? You can hear the miss in the engine. Video link attached:

99 7.3l blowby:
Reply With Quote
  #8  
Old 07-20-2014, 08:23 PM
aawlberninf350's Avatar
aawlberninf350 aawlberninf350 is offline
It's a Van Gogh
 
Join Date: Feb 2010
Location: Pinole, CA
Posts: 1,366
aawlberninf350 is a splendid one to beholdaawlberninf350 is a splendid one to beholdaawlberninf350 is a splendid one to beholdaawlberninf350 is a splendid one to beholdaawlberninf350 is a splendid one to beholdaawlberninf350 is a splendid one to behold
The rule of thumb on blowby is put the cap upside down on the tube; if it blows off that's too much. Rattling off due to vibration is normal. That smoke out of the oil fill tube looks ok to me. Maybe it's just my bad hearing due to the congestion in my ears from this damnable headcold, but it also sounds fine to me. Not hearing the miss, just normal 7.3 noises.

Do you have a infra red thermometer, aka a temp gun? Check the exhaust manifold at each exhaust port and see if one is significantly colder. That would be the bad one.

What kind of scanner does your buddy have? Many will not read the codes on a 7.3. If you do get codes, write them down.
__________________
David
2002 F350 7.3 CCSB 4X4 AIS WW Mishimoto 6.0 IC 6.0 trans cooler 26 row RiffRaff: FRx Plenum Reinforcers AIH Delete
Isspro EVs 50 cent Coolant Filter Hutch/Harpoon DP Tuner Walker BTM 4R100 w/FTVB nlemerise AC mod Mile Marker 449ss RedHead 08 diff cover Fumoto DDM HID 55w 4500k Rancho XL9000s Donaldson DBL7405 Peragon Bed Cover SSBC V8 Frozen Rotor Hawk LTS
Reply With Quote
  #9  
Old 07-20-2014, 08:29 PM
Firefighter 1406's Avatar
Firefighter 1406 Firefighter 1406 is offline
Postmaster
 
Join Date: Mar 2004
Location: Mishawaka, IN
Posts: 2,997
Firefighter 1406 has a very good reputation on FTE.Firefighter 1406 has a very good reputation on FTE.Firefighter 1406 has a very good reputation on FTE.
Is it a early 99 or late 99. The arrows are pointing to the intake plenums. I just got done doing these on my truck a couple of months ago. Yes you do have to pull the turbo to get to them and be able to do a good job of replacing them. If you have a late 99 and want to make sure you don't have these problems anymore check out riffraff and there billet plenums. Pricey but well worth the money. Quality is great and will put your mind at ease for them ever leaking again.
Reply With Quote
  #10  
Old 07-20-2014, 10:20 PM
HungOverSheep HungOverSheep is offline
New User
 
Join Date: Mar 2014
Posts: 16
HungOverSheep is starting off with a positive reputation.
Only the left side plenum is leaking, the other side passed my simple pressure test. The truck has terrible response and power on the low side of the rpm range; however, pass the 2000 rpm mark you would never notice the miss. I did the oil cap test and she passed with flying colors,I even placed my hand over the cap with no pressure. The blow by coming from the doghouse was somewhat pressurized but it is venting gases from the block. Is this normal? From what I described would you gentlemen (and ladies) think I could be dealing with a fouled up injector? My buddy has a scanner that is able to performer injector buzz testing and contribution testing. Not sure of the brand though.
Reply With Quote
  #11  
Old 07-20-2014, 10:23 PM
HungOverSheep HungOverSheep is offline
New User
 
Join Date: Mar 2014
Posts: 16
HungOverSheep is starting off with a positive reputation.
Quote:
Originally Posted by aawlberninf350 View Post
The rule of thumb on blowby is put the cap upside down on the tube; if it blows off that's too much. Rattling off due to vibration is normal. That smoke out of the oil fill tube looks ok to me. Maybe it's just my bad hearing due to the congestion in my ears from this damnable headcold, but it also sounds fine to me. Not hearing the miss, just normal 7.3 noises.

Do you have a infra red thermometer, aka a temp gun? Check the exhaust manifold at each exhaust port and see if one is significantly colder. That would be the bad one.

What kind of scanner does your buddy have? Many will not read the codes on a 7.3. If you do get codes, write them down.
I don't have an infrared temperature gun :/
Reply With Quote
  #12  
Old 07-20-2014, 10:24 PM
HungOverSheep HungOverSheep is offline
New User
 
Join Date: Mar 2014
Posts: 16
HungOverSheep is starting off with a positive reputation.
Quote:
Originally Posted by Firefighter 1406 View Post
Is it a early 99 or late 99. The arrows are pointing to the intake plenums. I just got done doing these on my truck a couple of months ago. Yes you do have to pull the turbo to get to them and be able to do a good job of replacing them. If you have a late 99 and want to make sure you don't have these problems anymore check out riffraff and there billet plenums. Pricey but well worth the money. Quality is great and will put your mind at ease for them ever leaking again.
How do you tell if it is a late or early 99?
Reply With Quote
  #13  
Old 07-20-2014, 11:59 PM
Firefighter 1406's Avatar
Firefighter 1406 Firefighter 1406 is offline
Postmaster
 
Join Date: Mar 2004
Location: Mishawaka, IN
Posts: 2,997
Firefighter 1406 has a very good reputation on FTE.Firefighter 1406 has a very good reputation on FTE.Firefighter 1406 has a very good reputation on FTE.
Late and early 99 is by the build date. If the build date is before December 1998 it is a early 99. You could also check your turbo. If your compressor housing only has 4 bolts instead of 5 it is an early 99. If one side of the plenums is leaking then the other will be soon to follow. Especially if you are planning any performance mods that bump boost psi the factory seal on the plenums are a weak spot. My truck with leaky plenums and some other things was doing the same thing. Very doggy and unresponsive. Very fixable stuff, you just have a sick truck that needs a little wrenching to feel better.
__________________
Seth "WE WILL NEVER FORGET" 343 PAA#129
Not so Early 99 F-250 Super Cab 4X4 w/7.3 stroker w/ 260,000, 6637 filter, 4" MBRP turbo back, coolant filter, zoodad, Hx, AutoMeter Guages, AIC, Leveling kit, Warn Premiums, 285 Duratrac's, Firestone Air Bags, Rancho 9000 XL's, Strobes,
www.roadsidehelpnetwork.org/
Reply With Quote
  #14  
Old 07-21-2014, 08:12 AM
HungOverSheep HungOverSheep is offline
New User
 
Join Date: Mar 2014
Posts: 16
HungOverSheep is starting off with a positive reputation.
From what I can tell the truck is a late 99 due to the vin # having an "X" in it; also the turbo housing seems to have five bolts. I counted four bolts and I could not see the back of the turbo housing and I doubt they would leave the back side of that sucker without reinforcement. The truck is sick, I will make another video today of me accelerating the engine so you can hear what exactly I am talking about. Videos help
Reply With Quote
  #15  
Old 07-21-2014, 09:46 PM
HungOverSheep HungOverSheep is offline
New User
 
Join Date: Mar 2014
Posts: 16
HungOverSheep is starting off with a positive reputation.
Here is the video of the truck engine being accelerated the miss is pretty clear in the video.

https://www.youtube.com/watch?v=o7Hi...ature=youtu.be
Reply With Quote
Old 07-21-2014, 09:46 PM
 
 
 
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
2001 f250 p1276 and p1274 cwbyup2002 1999 - 2003 7.3L Power Stroke Diesel 4 11-20-2014 10:39 PM
ohmed glowplugs cjgray1974 1999 - 2003 7.3L Power Stroke Diesel 6 04-10-2014 07:28 PM
BAD Fuel Mileage MPG 1996 California 7.3 Sensor OHM TEST DOZERDOZER 1994.5 - 1997 7.3L Power Stroke Diesel 22 02-11-2013 06:33 PM
Glowplug Test Ohm values rayashworth 1999 - 2003 7.3L Power Stroke Diesel 7 11-25-2008 12:02 PM
Finally tested GPs, results foxracer800 1999 - 2003 7.3L Power Stroke Diesel 14 10-16-2007 01:58 PM


Go Back   Ford Truck Enthusiasts Forums > Diesel > 1999 - 2003 7.3L Power Stroke Diesel

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


Participate In The Forums

Create new posts and participate in discussions. It's free!

Sign Up »





All times are GMT -5. The time now is 06:42 PM.


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. Ford® is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup