engine smoking white smoke
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Junior User
Joined: Oct 2017
Posts: 72
Likes: 1
From: Oklahoma City
engine smoking white smoke
I have finally gotten the truck running on all 8 and I have another issue. 2001 F250 CC SD. It is blowing white smoke pretty badly after it warms up. I ran a cylinder contribution test and it comes back with P0284 Cylinder #8 imbalance, P0541 Manifold Intake Air Filter Circuit Low, P0640 Manifold Intake Air Filter Circuit Fault, and P0231 Low Voltage Fuel Pump Secondary Circuit. I changed out the injector with another known good injector and it did not change things. Could the P0231 code cause the #8 cylinder to be the culprit? Would that cause the truck to smoke? I was going to run a compression test on that cylinder but the cheap diesel compression tester I bought at Harbor Freight will not fit down in the space available so that did not work. What could be some other reasons for the truck to smoke like that?
Laughing Gas
Joined: Jun 2017
Posts: 834
Likes: 125
From: CSRA, SC
White smoke means the fuel didn't get hot enough to blow up, it just vaporized. Generally that's low compression since compression is your heat source. Low compression would cause a failure of the cylinder contribution test. Do you have a way to measure fuel pressure? I'm not sure what a fuel pump secondary circuit is, but if you're running on low fuel pressure it could be affecting the injection, but in this case it really doesn't sound like it to me.
EDIT: you say it starts after it warms up...how long is that period? Like....exactly as long as the glow plug relay is on?
EDIT2: Severely retarded injection timing could also cause white smoke, but since you didn't see a difference with a known good injector, it's probably not that.
EDIT: you say it starts after it warms up...how long is that period? Like....exactly as long as the glow plug relay is on?
EDIT2: Severely retarded injection timing could also cause white smoke, but since you didn't see a difference with a known good injector, it's probably not that.
Got Data?
Joined: Dec 2012
Posts: 4,248
Likes: 1,381
From: Lake Stevens, WA
P0284 Cylinder #8 imbalance is common depending on the CPS you are using.
P0541 and P0640 are Manifold Intake Air heater codes, also not a big deal. I'm assuming your AIH is deleted?
P0231 is interesting and needs to be addressed, I'd say. Wiring to the fuel pump, or the pump itself, could be the issue.
You can do a quick and dirty compression test by removing the oil fill cap and placing it upside down on the filler neck, while the engine is idling. If it stays put and doesn't get blown off, that's a good sign.
Fuel pressure would be good to know.
P0541 and P0640 are Manifold Intake Air heater codes, also not a big deal. I'm assuming your AIH is deleted?
P0231 is interesting and needs to be addressed, I'd say. Wiring to the fuel pump, or the pump itself, could be the issue.
You can do a quick and dirty compression test by removing the oil fill cap and placing it upside down on the filler neck, while the engine is idling. If it stays put and doesn't get blown off, that's a good sign.
Fuel pressure would be good to know.
Thread Starter
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Junior User
Joined: Oct 2017
Posts: 72
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From: Oklahoma City
White smoke means the fuel didn't get hot enough to blow up, it just vaporized. Generally that's low compression since compression is your heat source. Low compression would cause a failure of the cylinder contribution test. Do you have a way to measure fuel pressure? I'm not sure what a fuel pump secondary circuit is, but if you're running on low fuel pressure it could be affecting the injection, but in this case it really doesn't sound like it to me.
EDIT: you say it starts after it warms up...how long is that period? Like....exactly as long as the glow plug relay is on?
EDIT2: Severely retarded injection timing could also cause white smoke, but since you didn't see a difference with a known good injector, it's probably not that.
EDIT: you say it starts after it warms up...how long is that period? Like....exactly as long as the glow plug relay is on?
EDIT2: Severely retarded injection timing could also cause white smoke, but since you didn't see a difference with a known good injector, it's probably not that.
P0284 Cylinder #8 imbalance is common depending on the CPS you are using.
P0541 and P0640 are Manifold Intake Air heater codes, also not a big deal. I'm assuming your AIH is deleted?
P0231 is interesting and needs to be addressed, I'd say. Wiring to the fuel pump, or the pump itself, could be the issue.
You can do a quick and dirty compression test by removing the oil fill cap and placing it upside down on the filler neck, while the engine is idling. If it stays put and doesn't get blown off, that's a good sign.
Fuel pressure would be good to know.
P0541 and P0640 are Manifold Intake Air heater codes, also not a big deal. I'm assuming your AIH is deleted?
P0231 is interesting and needs to be addressed, I'd say. Wiring to the fuel pump, or the pump itself, could be the issue.
You can do a quick and dirty compression test by removing the oil fill cap and placing it upside down on the filler neck, while the engine is idling. If it stays put and doesn't get blown off, that's a good sign.
Fuel pressure would be good to know.
I will go do the oil fill cap test now.
Thanks for the responses.
Got Data?
Joined: Dec 2012
Posts: 4,248
Likes: 1,381
From: Lake Stevens, WA
I think it is, based on what I've read here. So blow by is minimal.
You might have one or more worn out injectors. You've got good fuel pressure, and assuming compression is good on all 8, seems that leaves a worn injector(s) allowing late injection of fuel and resulting smoke. Does the white smoke have a smell, like unburned diesel? Not a coolant smell? That's the only other cause for white smoke I can think of, besides poor compression/lack of heat.
You said the rig has about 180K on the clock in your other post. That's getting into the territory of injectors starting to go. I mean they can go alot longer, depending on fuel and oil quality over their life, but it's not uncommon.
I'm sure others will weigh in, as I'm beyond my direct experience here. If other causes of white smoke after warmup have been ruled out, it might be good to do an actual compression test before pulling the trigger on new injectors.
You might have one or more worn out injectors. You've got good fuel pressure, and assuming compression is good on all 8, seems that leaves a worn injector(s) allowing late injection of fuel and resulting smoke. Does the white smoke have a smell, like unburned diesel? Not a coolant smell? That's the only other cause for white smoke I can think of, besides poor compression/lack of heat.
You said the rig has about 180K on the clock in your other post. That's getting into the territory of injectors starting to go. I mean they can go alot longer, depending on fuel and oil quality over their life, but it's not uncommon.
I'm sure others will weigh in, as I'm beyond my direct experience here. If other causes of white smoke after warmup have been ruled out, it might be good to do an actual compression test before pulling the trigger on new injectors.
FTE Chapter Leader
Joined: Jan 2005
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From: Henderson, NV
Originally Posted by chasteen1156
I was going to run a compression test on that cylinder but the cheap diesel compression tester I bought at Harbor Freight will not fit down in the space available
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Junior User
Joined: Oct 2017
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From: Oklahoma City
That is what I need. Thanks for the picture. I will do that today. A compression test should tell me a lot about what I need to know.
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Thread Starter
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Junior User
Joined: Oct 2017
Posts: 72
Likes: 1
From: Oklahoma City
Yes it comes back after clearing all the codes. Do you have any idea what I can check.
Got Data?
Joined: Dec 2012
Posts: 4,248
Likes: 1,381
From: Lake Stevens, WA
An interesting thread here on FTE about P0231 possible causes.
https://www.ford-trucks.com/forums/1...odel-year.html
In one of the attached files in that link, P0231.pdf, it lists some possible symptoms:
FK7 KOEO DIAGNOSTIC TROUBLE CODE P0231
Note: The inertia switch must be in the closed position for fuel pump to operate. Press inertia switch to make sure switch is closed.
Note: Voltage is present for 20 seconds after key on with engine not running.
DTC P0231 indicates voltage was not present on fuel pump monitor circuit when the fuel pump was commanded on.
Possible causes:
open inertia switch
blown F/P fuse
open fuel pump monitor circuit
open fuel pump control circuit
faulty fuel pump relay
It goes on to describe things to check, including the wiring in these areas.
Can you drive the truck and monitor fuel pressure? A WOT run or two would be good to see. If the fuel pressure holds, this code might just be a wiring issue - maybe an open in the fuel pump monitor circuit.
https://www.ford-trucks.com/forums/1...odel-year.html
In one of the attached files in that link, P0231.pdf, it lists some possible symptoms:
FK7 KOEO DIAGNOSTIC TROUBLE CODE P0231
Note: The inertia switch must be in the closed position for fuel pump to operate. Press inertia switch to make sure switch is closed.
Note: Voltage is present for 20 seconds after key on with engine not running.
DTC P0231 indicates voltage was not present on fuel pump monitor circuit when the fuel pump was commanded on.
Possible causes:
open inertia switch
blown F/P fuse
open fuel pump monitor circuit
open fuel pump control circuit
faulty fuel pump relay
It goes on to describe things to check, including the wiring in these areas.
Can you drive the truck and monitor fuel pressure? A WOT run or two would be good to see. If the fuel pressure holds, this code might just be a wiring issue - maybe an open in the fuel pump monitor circuit.
Thread Starter
|
Junior User
Joined: Oct 2017
Posts: 72
Likes: 1
From: Oklahoma City
An interesting thread here on FTE about P0231 possible causes.
https://www.ford-trucks.com/forums/1...odel-year.html
In one of the attached files in that link, P0231.pdf, it lists some possible symptoms:
FK7 KOEO DIAGNOSTIC TROUBLE CODE P0231
Note: The inertia switch must be in the closed position for fuel pump to operate. Press inertia switch to make sure switch is closed.
Note: Voltage is present for 20 seconds after key on with engine not running.
DTC P0231 indicates voltage was not present on fuel pump monitor circuit when the fuel pump was commanded on.
Possible causes:
open inertia switch
blown F/P fuse
open fuel pump monitor circuit
open fuel pump control circuit
faulty fuel pump relay
It goes on to describe things to check, including the wiring in these areas.
Can you drive the truck and monitor fuel pressure? A WOT run or two would be good to see. If the fuel pressure holds, this code might just be a wiring issue - maybe an open in the fuel pump monitor circuit.
https://www.ford-trucks.com/forums/1...odel-year.html
In one of the attached files in that link, P0231.pdf, it lists some possible symptoms:
FK7 KOEO DIAGNOSTIC TROUBLE CODE P0231
Note: The inertia switch must be in the closed position for fuel pump to operate. Press inertia switch to make sure switch is closed.
Note: Voltage is present for 20 seconds after key on with engine not running.
DTC P0231 indicates voltage was not present on fuel pump monitor circuit when the fuel pump was commanded on.
Possible causes:
open inertia switch
blown F/P fuse
open fuel pump monitor circuit
open fuel pump control circuit
faulty fuel pump relay
It goes on to describe things to check, including the wiring in these areas.
Can you drive the truck and monitor fuel pressure? A WOT run or two would be good to see. If the fuel pressure holds, this code might just be a wiring issue - maybe an open in the fuel pump monitor circuit.
Thread Starter
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Junior User
Joined: Oct 2017
Posts: 72
Likes: 1
From: Oklahoma City
I purchased all the parts for this adapter except the 10mm ORB adapter. I had to order it online. I will run a compression test when I get that part in.
Got Data?
Joined: Dec 2012
Posts: 4,248
Likes: 1,381
From: Lake Stevens, WA
Another interesting link connecting white smoke when warm to possible turbo oil seal leak into the exhaust.
https://www.ford-trucks.com/forums/1...when-warm.html
Does the white smoke smell like oil? or fuel? or coolant?
https://www.ford-trucks.com/forums/1...when-warm.html
Does the white smoke smell like oil? or fuel? or coolant?
Thread Starter
|
Junior User
Joined: Oct 2017
Posts: 72
Likes: 1
From: Oklahoma City
An interesting thread here on FTE about P0231 possible causes.
https://www.ford-trucks.com/forums/1...odel-year.html
In one of the attached files in that link, P0231.pdf, it lists some possible symptoms:
FK7 KOEO DIAGNOSTIC TROUBLE CODE P0231
Note: The inertia switch must be in the closed position for fuel pump to operate. Press inertia switch to make sure switch is closed.
Note: Voltage is present for 20 seconds after key on with engine not running.
DTC P0231 indicates voltage was not present on fuel pump monitor circuit when the fuel pump was commanded on.
Possible causes:
open inertia switch
blown F/P fuse
open fuel pump monitor circuit
open fuel pump control circuit
faulty fuel pump relay
It goes on to describe things to check, including the wiring in these areas.
Can you drive the truck and monitor fuel pressure? A WOT run or two would be good to see. If the fuel pressure holds, this code might just be a wiring issue - maybe an open in the fuel pump monitor circuit.
https://www.ford-trucks.com/forums/1...odel-year.html
In one of the attached files in that link, P0231.pdf, it lists some possible symptoms:
FK7 KOEO DIAGNOSTIC TROUBLE CODE P0231
Note: The inertia switch must be in the closed position for fuel pump to operate. Press inertia switch to make sure switch is closed.
Note: Voltage is present for 20 seconds after key on with engine not running.
DTC P0231 indicates voltage was not present on fuel pump monitor circuit when the fuel pump was commanded on.
Possible causes:
open inertia switch
blown F/P fuse
open fuel pump monitor circuit
open fuel pump control circuit
faulty fuel pump relay
It goes on to describe things to check, including the wiring in these areas.
Can you drive the truck and monitor fuel pressure? A WOT run or two would be good to see. If the fuel pressure holds, this code might just be a wiring issue - maybe an open in the fuel pump monitor circuit.