99 7.3 powerstroke slight miss.nopower,rpm drop ,bad mpg,acts like its out of time
#1
11-20-2009, 01:59 AM
99 7.3 powerstroke slight miss.nopower,rpm drop ,bad mpg,acts like its out of time
Plz help i got a 7.3 giving me all kinds of hell here is a list of problems and a list of what i have done so far.
PROBLEMS
1. Slight miss that comes and goes
2. No power low throttle response
3 Rpms drop below what they should then go up and down when idling at light rang of 20 to 50 pre
4. Very bad mpg only getting around 7 to 8 mpg
5 No take off power
6. acts like its out of time like gas motor would
7 sometimes it will have power but still not like it should
Things Ive fix so far
1. 8 new inj A&d
2. new ipc sensor
3. new map sensor
4. new turbo wheel
5. new fuel filter
6. oil change
7. air filter
8. new fuel filter housing rebuild and cleaning
9. cleaned ebp sensor and port didn't take tube off yet
10.put new and more grounds on motor and frame to batt
11. cleaned pick up screen in the fuel tank
12. removed the clogged cat
13. straight piped it
14. new cps it gray top 1
Thing you all ways ask
1. (yes) i have scanned it got few codes PO1211,po603,po1316
2. ( no) i haven't checked fuel pressure yet not sure on how to or what to use
god plz help me guy i use this truck day for mi biz only 1 i got i got to keep it ruining
P.S IF YOU CAN HELP ME ILL GIVE YOU A COOKIE CAN AFFORD MUCH MORE
PROBLEMS
1. Slight miss that comes and goes
2. No power low throttle response
3 Rpms drop below what they should then go up and down when idling at light rang of 20 to 50 pre
4. Very bad mpg only getting around 7 to 8 mpg
5 No take off power
6. acts like its out of time like gas motor would
7 sometimes it will have power but still not like it should
Things Ive fix so far
1. 8 new inj A&d
2. new ipc sensor
3. new map sensor
4. new turbo wheel
5. new fuel filter
6. oil change
7. air filter
8. new fuel filter housing rebuild and cleaning
9. cleaned ebp sensor and port didn't take tube off yet
10.put new and more grounds on motor and frame to batt
11. cleaned pick up screen in the fuel tank
12. removed the clogged cat
13. straight piped it
14. new cps it gray top 1
Thing you all ways ask
1. (yes) i have scanned it got few codes PO1211,po603,po1316
2. ( no) i haven't checked fuel pressure yet not sure on how to or what to use
god plz help me guy i use this truck day for mi biz only 1 i got i got to keep it ruining
P.S IF YOU CAN HELP ME ILL GIVE YOU A COOKIE CAN AFFORD MUCH MORE
#2
11-20-2009, 02:24 AM
Join Date: Jan 2006
Location: Gulf Coast of Florida
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It sounds like your UVCH (Under Valve Cover Harness) is loose or possibly shorted out on one side. Search for "UVCH" and you'll find LOTS of information.
EDIT: PaysonPSD posted this in another thread and has links with details.
Some info about UVCH.
What your problem might be. LINK
How to OHM out the UVCH for continuity:
Checking the ohms reading at the valve cover connector on the outside.
Pin Out
G
G
I
I
C
I
I
G
G
G=Glow Plug
I = Injector
C= Injector Common
NOTE: The injectors fire with a 115VDC signal from the IDM. *** Do Not pierce the wires to test***
Test between "I" and "C" to test the injectors, should be less than 5.0 Ohms.
To check glow plugs Test between "G" and battery ground. Should be between 0.6 and 2.0 Ohms
If your readings are not within these parameters you may have bad injector, glow plug or loose connector under the valve cover.
__________________
EDIT: PaysonPSD posted this in another thread and has links with details.
Some info about UVCH.
What your problem might be. LINK
How to OHM out the UVCH for continuity:
Checking the ohms reading at the valve cover connector on the outside.
Pin Out
G
G
I
I
C
I
I
G
G
G=Glow Plug
I = Injector
C= Injector Common
NOTE: The injectors fire with a 115VDC signal from the IDM. *** Do Not pierce the wires to test***
Test between "I" and "C" to test the injectors, should be less than 5.0 Ohms.
To check glow plugs Test between "G" and battery ground. Should be between 0.6 and 2.0 Ohms
If your readings are not within these parameters you may have bad injector, glow plug or loose connector under the valve cover.
__________________
#3
11-20-2009, 06:03 AM
#4
11-20-2009, 06:13 AM
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#7
11-20-2009, 09:13 AM
Join Date: Jan 2006
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TPS = throttle position sensor
If you go to the 'root' of this forum, you'll see a 'sticky' at the top of the listing of threads: Common Mods, Maintenance, etc. .... something like that. You'll pick it up as you go, but taking the time to read through that is well worth it. Take your laptop in the bathroom with you, just try not to let your legs go numb
If you go to the 'root' of this forum, you'll see a 'sticky' at the top of the listing of threads: Common Mods, Maintenance, etc. .... something like that. You'll pick it up as you go, but taking the time to read through that is well worth it. Take your laptop in the bathroom with you, just try not to let your legs go numb
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#9
11-20-2009, 11:55 AM
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You'll probably need AE - AutoEnginuity.
Here's a thread I found using the Search feature of the forum:
https://www.ford-trucks.com/forums/8...on-sensor.html
You can find the Search this Forum button in the blue bar at the top of the thread listings. It's in the same place on all forums, sub-forums, etc. and is super handy.
Here's a thread I found using the Search feature of the forum:
https://www.ford-trucks.com/forums/8...on-sensor.html
You can find the Search this Forum button in the blue bar at the top of the thread listings. It's in the same place on all forums, sub-forums, etc. and is super handy.
#11
11-27-2009, 08:08 PM
#12
11-27-2009, 11:57 PM
A few things I would be thinking about would be fuel pressure, high pressure oil leaks, boost leaks, and harness issues.
You said you had a shop do a buzz test, why don't they just diagnose it?
Can you monitor PIDs? What is your ICP reading at WOT? How much boost can you achieve?
The code P1316 indicates you have injector circuit problems. Did you perform the test that Brendan recommended?
Jay
You said you had a shop do a buzz test, why don't they just diagnose it?
Can you monitor PIDs? What is your ICP reading at WOT? How much boost can you achieve?
The code P1316 indicates you have injector circuit problems. Did you perform the test that Brendan recommended?
Jay
#14
11-28-2009, 03:34 PM
Welcome!!!
For the fun of it why dont you throw a black CPS in there and see if it changes anything...
The grey CPS's are known to cause issues.
Here is a link to my thread about them. EVEN though you are not displaying the proper codes according to the service message. Ford obviously dose not have a handle on what is going on.
https://www.ford-trucks.com/forums/9...code-info.html
For the fun of it why dont you throw a black CPS in there and see if it changes anything...
The grey CPS's are known to cause issues.
Here is a link to my thread about them. EVEN though you are not displaying the proper codes according to the service message. Ford obviously dose not have a handle on what is going on.
https://www.ford-trucks.com/forums/9...code-info.html