Help, Please!
#1
Help, Please!
I need some desperate help! We are on vacation in , we are in Bayfield right outside of </FONT><?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com[img] /><st1:State>Colorado</ST1<IMG class=inlineimg title=[/img]la</st1:State><font face=" /><st1:State><ST1<FONT face=Arial>Durango</FONT></ST1</st1:State><FONT face=Arial>. I am pulling a 35' FW. In </FONT><st1:State><FONT face=Arial>New Mexico</FONT></ST1</st1:State><FONT face=Arial>, my truck started acting up. The SES light came on. We pulled into a parking lot and it went off. We went on and it kept doing it, especi</FONT><st1:PersonName><FONT face=Arial>al</FONT></st1:PersonName><FONT face=Arial>ly when pulling up a long grade. It got to where it was de-fueling and would run very rough. When I got a fuse to replace the blown one in the data link circuit, I checked the codes. The only one that was in it was P1211. We went on and it seemed to get worse. I put it back to stock to see if that would help, it didn't. I unplugged the ICP (that is the one screwed into the head right?). At first I thought it did better but it started doing it again. It acts like a fuel filter clogged, when you stop it for a while it will get better until it has to start pulling hard. I pulled the top off the filter and it looked clean as a pin. I changed it before I left. I got up this morning and checked the codes again and it had P0198, P0603, P1211 and P1280. I assume the P1280 was from unplugging the ICP, and maybe the P1211?</FONT>
<FONT face=Arial>Anyone got any ideas?<O</O</FONT>
<O</O
<FONT face="Times New Roman"><FONT size=3>Thanks!</FONT></FONT>
Steve
<FONT face=Arial>Anyone got any ideas?<O</O</FONT>
<O</O
<FONT face="Times New Roman"><FONT size=3>Thanks!</FONT></FONT>
Steve
#2
I can't really help you too much but here is a site that lists what the codes are. Hopefully Alan or Kwik will be along today and they can give you a little troubleshooting help.
http://www.freeautoadvice.com/diesel/pscodes.html
http://www.freeautoadvice.com/diesel/pscodes.html
#3
P0198 EOT Sensor Circuit High Input
Sounds to me like your truck was defueling from this. Most likely the Engine Oil Temp sensor was sending a signal to the PCM which made it seem like it was running VERY hot, at that time which it defueled.
P1280 ICP Circuit Out of Range Low
This was from unplugging your ICP sensor. Plug it back in
P1211 is normal for a chipped truck, and so is P0603.
Sounds to me like your truck was defueling from this. Most likely the Engine Oil Temp sensor was sending a signal to the PCM which made it seem like it was running VERY hot, at that time which it defueled.
P1280 ICP Circuit Out of Range Low
This was from unplugging your ICP sensor. Plug it back in
P1211 is normal for a chipped truck, and so is P0603.
#4
What blew that fuse?
The tin nut on the IPR may be loose.
I see you have fixed your tank pickup so that eliminates a clogged filter.
Does it pull better at lower rpms?
Did you put a pre-filter between the pump and the tank?
There is a screen inside the inlet of the fuel pump that will clog badly (personal experience) and cause a big power loss during high fuel demand like towing.
And again, what blew that fuse?
The tin nut on the IPR may be loose.
I see you have fixed your tank pickup so that eliminates a clogged filter.
Does it pull better at lower rpms?
Did you put a pre-filter between the pump and the tank?
There is a screen inside the inlet of the fuel pump that will clog badly (personal experience) and cause a big power loss during high fuel demand like towing.
And again, what blew that fuse?
#5
Originally Posted by strokin_it7.3
P0198 EOT Sensor Circuit High Input
Sounds to me like your truck was defueling from this. Most likely the Engine Oil Temp sensor was sending a signal to the PCM which made it seem like it was running VERY hot, at that time which it defueled.
P1280 ICP Circuit Out of Range Low
This was from unplugging your ICP sensor. Plug it back in
P1211 is normal for a chipped truck, and so is P0603.
Sounds to me like your truck was defueling from this. Most likely the Engine Oil Temp sensor was sending a signal to the PCM which made it seem like it was running VERY hot, at that time which it defueled.
P1280 ICP Circuit Out of Range Low
This was from unplugging your ICP sensor. Plug it back in
P1211 is normal for a chipped truck, and so is P0603.
It does seem that it could be the EOT sensor because when I stop and let it cool it will do good for a while. I checked the oil when I stopped once and it did not seem hotter than normal. Is there any way I can check it? Where exactly is it located?
What blew that fuse?
The tin nut on the IPR may be loose.
I see you have fixed your tank pickup so that eliminates a clogged filter.
Does it pull better at lower rpms?
Did you put a pre-filter between the pump and the tank?
There is a screen inside the inlet of the fuel pump that will clog badly (personal experience) and cause a big power loss during high fuel demand like towing.
And again, what blew that fuse?
The tin nut on the IPR may be loose.
I see you have fixed your tank pickup so that eliminates a clogged filter.
Does it pull better at lower rpms?
Did you put a pre-filter between the pump and the tank?
There is a screen inside the inlet of the fuel pump that will clog badly (personal experience) and cause a big power loss during high fuel demand like towing.
And again, what blew that fuse?
Thanks Everyone!
#6
EOT: A problem but not one that will cause what you are talking about (see the "Detection/Management" Line)
Sounds like the HPOP cant keep up with demand ie 1211 and 1280. Go back to stock tune and see if the problem is still there.
Originally Posted by Service Manual
Signal Functions
The engine oil temperature (EOT) sensor is a thermistor type sensor that has a variable resistance that changes when exposed to different temperatures. When interfaced with the powertrain control module (PCM), it produces a 0 to 5 volt analog signal that will deduce temperature.
Cranking Fuel Quantity/Timing Control — The EOT sensor signal is used to determine the timing and quantity of fuel required to optimize starting over all temperature conditions.
Idle Speed — At oil temperatures below 70°C (158°F) low idle is incrementally increased to a maximum of 950 rpm.
Temperature Compensation — Fuel quantity and timing is controlled throughout the total operating range to ensure adequate torque and power is available.
Glow Plug Control — The glow plug relay (federal) or Glow Plug Control Module (GPCM) (California) and lamp ON times are controlled by engine oil temperature.
Detection/Management
An EOT sensor signal that is detected out of range (high or low) by the PCM will cause the PCM to ignore the EOT sensor signal and assume an engine oil temperature of -20°C (-4°F) for starting and a temperature of 100°C (212°F) for engine-running conditions. The CHECK ENGINE light will also be illuminated as long as the condition exists.
The engine oil temperature (EOT) sensor is a thermistor type sensor that has a variable resistance that changes when exposed to different temperatures. When interfaced with the powertrain control module (PCM), it produces a 0 to 5 volt analog signal that will deduce temperature.
Cranking Fuel Quantity/Timing Control — The EOT sensor signal is used to determine the timing and quantity of fuel required to optimize starting over all temperature conditions.
Idle Speed — At oil temperatures below 70°C (158°F) low idle is incrementally increased to a maximum of 950 rpm.
Temperature Compensation — Fuel quantity and timing is controlled throughout the total operating range to ensure adequate torque and power is available.
Glow Plug Control — The glow plug relay (federal) or Glow Plug Control Module (GPCM) (California) and lamp ON times are controlled by engine oil temperature.
Detection/Management
An EOT sensor signal that is detected out of range (high or low) by the PCM will cause the PCM to ignore the EOT sensor signal and assume an engine oil temperature of -20°C (-4°F) for starting and a temperature of 100°C (212°F) for engine-running conditions. The CHECK ENGINE light will also be illuminated as long as the condition exists.
#7
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#10
#11
I set it back to stock and it does the same thing. The codes I posted came after I set it back to stock. Only thing the change to stock did was reduce the power when it was running OK. After it sits for a while it will run OK then start acting up again, even when it is not pulling hard.
Thanks Again Guys!
Thanks Again Guys!
#12
Is there any oil in the ICP sensor connector?
You will need to replace the EOT sensor, if it is only marginally bad (biased) it could be reading 10-20 degrees hot but, not out of range. This could cause a change in fuel mapping as the PCM thinks the truck is about to overheat. Also if the PCM starts to defuel because it thinks the truck is overheating the PCM could interpret the drop in ICP pressure as a fault and giving you the 1211 & 1280.
For a test unplug the EOT and see if it still does it. unplugged the PCM will use a default of 212* when running.
You will need to replace the EOT sensor, if it is only marginally bad (biased) it could be reading 10-20 degrees hot but, not out of range. This could cause a change in fuel mapping as the PCM thinks the truck is about to overheat. Also if the PCM starts to defuel because it thinks the truck is overheating the PCM could interpret the drop in ICP pressure as a fault and giving you the 1211 & 1280.
For a test unplug the EOT and see if it still does it. unplugged the PCM will use a default of 212* when running.
#13
Originally Posted by 01stroker
How hard is that screen in the inlet of the pump to check?
Thanks Everyone!
Thanks Everyone!
#14
Originally Posted by amiller93
Is there any oil in the ICP sensor connector?
You will need to replace the EOT sensor, if it is only marginally bad (biased) it could be reading 10-20 degrees hot but, not out of range. This could cause a change in fuel mapping as the PCM thinks the truck is about to overheat. Also if the PCM starts to defuel because it thinks the truck is overheating the PCM could interpret the drop in ICP pressure as a fault and giving you the 1211 & 1280.
For a test unplug the EOT and see if it still does it. unplugged the PCM will use a default of 212* when running.
You will need to replace the EOT sensor, if it is only marginally bad (biased) it could be reading 10-20 degrees hot but, not out of range. This could cause a change in fuel mapping as the PCM thinks the truck is about to overheat. Also if the PCM starts to defuel because it thinks the truck is overheating the PCM could interpret the drop in ICP pressure as a fault and giving you the 1211 & 1280.
For a test unplug the EOT and see if it still does it. unplugged the PCM will use a default of 212* when running.
Remove the quick connect from the rear of the pump and look inside. Borrow your wifes hand-held make up mirror or go buy a cheapo one, you'll need it unless you want to remove the pump altogether. You may need to find a way to get the fuel to drain out. You should see a fine screen. If you see a bunch of sediment, you've found your problem.
Thanks!
#15
Update! I replaced the EOT sensor for $30. Thursday we left Bayfield, Co. for Colorado Springs, went over Wolf Creek pass at almost 11,000 ft, no problem. It sailed right over it. Later in the day right outside of Co Springs, I blew the line to the boost gague out and it acted up a little, put it back in and it is doing fine now. I have got to fix that cheap hookup for the gague. It has the little boot that came with it and it doesn't work well. Thanks everyone for all the help! Maybe I will make it back home OK!