Question about 2006 Ford F 350 Super Duty

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2006 f350 starts fine cold,but won't start after warm

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

zr800o1le
  • 19 Answers

SOURCE: 2006 f350 wont start if warm

It is Vapor Locking at the Pump. The O rings are Swelling too much and will not allow the fuel to leave the Pump or enter the Injectors.
Ford knows of this Problem. Call a Local Mechanic He will have to Fix the Problem

Posted on May 12, 2009

  • 1 Answer

SOURCE: I have a 2005 Ford F350 6.0 Diesel and It wont

I had this same issue and luckily my F350 2006 was still under warranty. Basically there is a high pressure oil system that has a tendency to leak internally. You won't see any oil leak. When cold the oil has enough viscosity to keep the pressure sensor from not allowing the engine to start. When the engine is warm the system doesn't reach required pressure to allow the engine to start. In short it's a Ford dealer repair. Good luck.

Posted on Jun 03, 2010

SOURCE: 2004 F350 6.0L starts rough and runs rough until

What tells me, is that the thermostat is staying open after
your done using the truck
When you start it up cold, it takes longer to warm up the area
near the coolant temp sensor,which is part of the system
to put the PCM (computer) into closed loop
Closed loop is when you leave a computer fuel stratagy and
the O2 Sensors take over fuel control

Hard to start----

Need spark plugs that have not been in the motor over 60,000 miles
Spray the throttle plate with CRC Throttle Cleaner
Spray the MAF Sensor with CRC MAF Cleaner
Need all ducting in place,no vacuum leaks and a clean air filter
Make sure your O2 Sensors are tight
A fuel filter not over 3 years old
Hope the coolant temp sensors works correctly

Anything more gets too technical

Posted on Dec 02, 2010

tburtk
  • 158 Answers

SOURCE: 2006 f350 super duty diesel

these trucks use a oil fired fuel injector, if your high pressure oil pump has eccessive wear or if your oil to broken down from being run to long between oil change, it will not build enough oil pressure to fire the injector once the oil is thinned out from being hot. An oil leak in your high pressure oil system can cause same problem.

Posted on Jan 14, 2011

  • 67 Answers

SOURCE: I have a 2006 ford

Not knowing your experience with diesel motors,if the glow plugs are not being allowed to cycle it makes starting the motor cold much harder. If it has a block heater package that also helps to plug in. Keeps the coolant warm and in turn keeps the motor warm.

Posted on Feb 10, 2011

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Related Questions:

1 Answer

1996 Ford F350 diesel won't start


Hi Austin, I think you hit the nail right on the head! Replace the glow plugs:-) Regards John

Oct 19, 2012 | Cars & Trucks

1 Answer

Runs fine when cold, not when warm though


The next time it won't start check the fuel pressure you should have 48-55 psi with key on and engine off.

Jan 06, 2012 | 1997 Buick LeSabre

1 Answer

I have a 2006 ford F350 that is hard to start in the morning (cold weather) and blows black smoke when it finally starts. The batteries are less than a year old.


Not knowing your experience with diesel motors,if the glow plugs are not being allowed to cycle it makes starting the motor cold much harder. If it has a block heater package that also helps to plug in. Keeps the coolant warm and in turn keeps the motor warm.

Feb 10, 2011 | 2005 Ford F 350 Super Duty

1 Answer

I have an 06 f350 super duty with a 6.0 litre diesel. The truck starts fine. But when i start to drive it accelerates roughly like its sputtering this only goes on until truck is fully warmed up. I have...


yes it sounds like the pressure regulator. the only way to be sure is have a scan machine put on the truck, then you can see the pressure when truck is cold.They are quite pricey so dont just change it without checking the pressure first.

Oct 26, 2010 | 2006 Ford F 350 Super Duty

1 Answer

I have a 2005 Ford F350 6.0 Diesel and It wont start after the motor gets warm. It also starts rough when cold. When it is running it runs great. Any help would be appreciated.


I had this same issue and luckily my F350 2006 was still under warranty. Basically there is a high pressure oil system that has a tendency to leak internally. You won't see any oil leak. When cold the oil has enough viscosity to keep the pressure sensor from not allowing the engine to start. When the engine is warm the system doesn't reach required pressure to allow the engine to start. In short it's a Ford dealer repair. Good luck.

May 31, 2010 | 2004 Ford F350

1 Answer

2006 f350 wont start if warm


It is Vapor Locking at the Pump. The O rings are Swelling too much and will not allow the fuel to leave the Pump or enter the Injectors.
Ford knows of this Problem. Call a Local Mechanic He will have to Fix the Problem

May 12, 2009 | 2006 Ford F 350 Super Duty

1 Answer

1992 F-350 Dsl - very hard to start when cool


are you using cold temperature engine oil!
if not, try changing oil for cold temperature!

hard starting happens due to the cold temperature, air pressure is low during this season so compression inside the engine is low resulting to hard starting!

make sure that all your glow plugs are working.

Nov 07, 2008 | 1992 Ford F350

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