please hheellpp!!!!
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New User
Joined: Jul 2008
Posts: 17
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please hheellpp!!!!
hay all,
ok, let me give you guys the low down. see if you can help me out.
i was driving home from work (about 30 miles) and everything sounded fine. i pulled up to the stop light and as my trucks idle started coming down, i noticed it started getting rough. i reved it up to 1000 rpm to feel it and hear it, and blue/grey smoke started pouring out the exhaust, and the idle got worse. i tried reving it up a little and it would choke out. it didnt want to rev at all. kinda curious as to why my truck would be doing this, and any input would be greatly appreciated.
for my info: 2002 f-250 7.3l zf6 tranny 4" exhaust k$n intake edge tuner w/attitude.
thanks for your time.
ok, let me give you guys the low down. see if you can help me out.
i was driving home from work (about 30 miles) and everything sounded fine. i pulled up to the stop light and as my trucks idle started coming down, i noticed it started getting rough. i reved it up to 1000 rpm to feel it and hear it, and blue/grey smoke started pouring out the exhaust, and the idle got worse. i tried reving it up a little and it would choke out. it didnt want to rev at all. kinda curious as to why my truck would be doing this, and any input would be greatly appreciated.
for my info: 2002 f-250 7.3l zf6 tranny 4" exhaust k$n intake edge tuner w/attitude.
thanks for your time.
Elder User
Joined: Feb 2007
Posts: 928
Likes: 1
Welcome to FTE!!
cps maybe? Did it just do it once and then act fine? I would guess the CPS.
BTW trash the K&N and get a 6673 filter and also get rid of the edge for a DP tuner. You will come to realize this.
Once again WELCOME!!
cps maybe? Did it just do it once and then act fine? I would guess the CPS.
BTW trash the K&N and get a 6673 filter and also get rid of the edge for a DP tuner. You will come to realize this.
Once again WELCOME!!
Fleet Owner
Joined: Aug 2001
Posts: 29,941
Likes: 46
From: Drummonds, TN USA
Sounds kind of ominous... Blue smoke is usually oil.
Excess fuel would make black smoke.
I do remember one or two experiences with people at RV dealerships that filled up the diesel service trucks with regular gas - and that had similar results. If I remember right, 7.3's have a water seperator dead center on top of the engine that can be drained to purge it, and fresh diesel can be added directly to it as a way to find out if it's something in the fuel.
Excess fuel would make black smoke.
I do remember one or two experiences with people at RV dealerships that filled up the diesel service trucks with regular gas - and that had similar results. If I remember right, 7.3's have a water seperator dead center on top of the engine that can be drained to purge it, and fresh diesel can be added directly to it as a way to find out if it's something in the fuel.
Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
Welcome to FTE. I assume you got a check engine light when this happened? Do you know anyone who can pull the codes for you?
Did the truck just run rough like it wasn't hitting on all cylinders, or did it act more like it was trying to die?
Just to rule out a couple of basics, do you have over 1/4 tank of fuel, and is the oil level low?
Did the truck just run rough like it wasn't hitting on all cylinders, or did it act more like it was trying to die?
Just to rule out a couple of basics, do you have over 1/4 tank of fuel, and is the oil level low?
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New User
Joined: Jul 2008
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no, it sarted yesterday. so i figured i would let it cool down and try it again later. well, this morning i went out and checked my oil, i just changed a couple of weeks ago, and everything was fine. started it up in stock tune and it idled rougher than a cobble stone driveway and would lay a smoke screen in the road.
Thread Starter
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New User
Joined: Jul 2008
Posts: 17
Likes: 0
Sounds kind of ominous... Blue smoke is usually oil.
Excess fuel would make black smoke.
I do remember one or two experiences with people at RV dealerships that filled up the diesel service trucks with regular gas - and that had similar results. If I remember right, 7.3's have a water seperator dead center on top of the engine that can be drained to purge it, and fresh diesel can be added directly to it as a way to find out if it's something in the fuel.
Excess fuel would make black smoke.
I do remember one or two experiences with people at RV dealerships that filled up the diesel service trucks with regular gas - and that had similar results. If I remember right, 7.3's have a water seperator dead center on top of the engine that can be drained to purge it, and fresh diesel can be added directly to it as a way to find out if it's something in the fuel.
already tried draining the diesel and everything was fine. i realize blue smoke is oil, thats why i was concerned and posted my problem.
Fleet Owner
Joined: Aug 2001
Posts: 29,941
Likes: 46
From: Drummonds, TN USA
I'd say it's time to get a diesel engine compression guage and find out if the cylinders have any problems.
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New User
Joined: Jul 2008
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Welcome to FTE. I assume you got a check engine light when this happened? Do you know anyone who can pull the codes for you?
Did the truck just run rough like it wasn't hitting on all cylinders, or did it act more like it was trying to die?
Just to rule out a couple of basics, do you have over 1/4 tank of fuel, and is the oil level low?
Did the truck just run rough like it wasn't hitting on all cylinders, or did it act more like it was trying to die?
Just to rule out a couple of basics, do you have over 1/4 tank of fuel, and is the oil level low?
i had a litle over half a tank and the oil was a little low so i added to it and it didnt fix anything. the p.o.s. edge tuner always throws the check engine light, so i woulndnt be able to tell if the probplem threw a code. i dont have access to a scanner. i did start the truck after it was cool, and the same problem arose and no light trown.
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Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
Lots of smoke is not a good sign. A loose UVCH clip might smoke a little, but not enough for a smoke screen. Try pulling the oil cap with the engine running and check for blow by. Do you see light to moderate smoke out the fill neck or does it puff like a steam engine?
Is there any signs of oil in the bottom of the fuel filter bowl or in the engine coolant?
Is there any signs of oil in the bottom of the fuel filter bowl or in the engine coolant?
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New User
Joined: Jul 2008
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Lots of smoke is not a good sign. A loose UVCH clip might smoke a little, but not enough for a smoke screen. Try pulling the oil cap with the engine running and check for blow by. Do you see light to moderate smoke out the fill neck or does it puff like a steam engine?
Is there any signs of oil in the bottom of the fuel filter bowl or in the engine coolant?
Is there any signs of oil in the bottom of the fuel filter bowl or in the engine coolant?
ok so i checked the coolant, no oil, i checked the oil filler cap, no smoke at all, and i checked the fuel bowl and no oil. im not sure what the uvch clip is...
Last edited by jugganot; Jul 4, 2008 at 07:33 PM. Reason: misspelling
Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
We usually don't see much smoke associated with this type of thing, but the UVCH (Under Valve Cover Harness) is the wiring harness under the valve cover that provide power to your injectors and glow plugs. If you look on the inboard side of each valve cover, you will see a flat wiring connector that plugs right where the VC gasket is. There is just a pass thru connector in the gasket, and a similar plug inside the valve cover. Those have been know to come loose and will make your truck run without a few cylinders. Let me look something up. In the mean time, if you have an ohm meter you can test this by unplugging the 9 pin connector at each valve cover.
The 9-pin plug is wired as follows:
G G I I C I I G G
G=Glow Plug +
I = Injector +
C= Injector Common
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
Here's a link with pictures so you can see what it is you're looking for with the meter.
https://www.ford-trucks.com/forums/27...or-wiring.html
The 9-pin plug is wired as follows:
G G I I C I I G G
G=Glow Plug +
I = Injector +
C= Injector Common
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
Here's a link with pictures so you can see what it is you're looking for with the meter.
https://www.ford-trucks.com/forums/27...or-wiring.html
Gone Fishin for Mark
Joined: Nov 2004
Posts: 1,354
Likes: 2
From: West of Houston
I would certainly ohm out the Under Valve Cover harness. It is fairly simple to check to rule that out. Do a search for it or just wait a bit, someone better than me will link it for you. It will cause rough running ans SOME smoke, not usually tons and it is generally whitish/grey, unburned fuel.
Thread Starter
|
New User
Joined: Jul 2008
Posts: 17
Likes: 0
We usually don't see much smoke associated with this type of thing, but the UVCH (Under Valve Cover Harness) is the wiring harness under the valve cover that provide power to your injectors and glow plugs. If you look on the inboard side of each valve cover, you will see a flat wiring connector that plugs right where the VC gasket is. There is just a pass thru connector in the gasket, and a similar plug inside the valve cover. Those have been know to come loose and will make your truck run without a few cylinders. Let me look something up. In the mean time, if you have an ohm meter you can test this by unplugging the 9 pin connector at each valve cover.
The 9-pin plug is wired as follows:
G G I I C I I G G
G=Glow Plug +
I = Injector +
C= Injector Common
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
Here's a link with pictures so you can see what it is you're looking for with the meter.
https://www.ford-trucks.com/forums/27...or-wiring.html
The 9-pin plug is wired as follows:
G G I I C I I G G
G=Glow Plug +
I = Injector +
C= Injector Common
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
Here's a link with pictures so you can see what it is you're looking for with the meter.
https://www.ford-trucks.com/forums/27...or-wiring.html
Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
https://www.ford-trucks.com/forums/2...or-wiring.html
Also while you're playing around under there, not many people here are fans of the K&N. You might pull the intake hose off the turbo and have a look at the wheel inside there. The wheel should have no noticeable play in and out, and very little up and down play. The blades should be smooth with no signs of pitting or rough edges. You also shouldn't see any signs of dirt in there.
Do you know anyone with a scanner capable of checking a Powerstroke? An injector buzz test and cylinder contribution test would be nice. If we can't come up with anything else you may be forced to pull the valve covers and check out things out visually.