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2004 F250 Super Duty runs very rough at idle until warm. Check Engine light is on. Jus had a new intercooler installed.

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Posted on Jan 02, 2017

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SOURCE: ford f250 2003 super duty diesel 6L - loss of power and idle fluctuates

CHECK EXAUSTE PRESURE. YOU WILL FINF THAT IT IS STOPPED UP

Posted on Oct 04, 2008

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SOURCE: mercedes 190e 2.6 auto,starts fine

MAY REQUIRER THROTTLE BODY CLEAN UP,OR FUEL CLEANER IN THE SYSTEM...

Posted on Nov 15, 2008

  • 188 Answers

SOURCE: Check engine light is on in 2004 Lincoln aviator

Go to Wal-Mart or Auotparts store and buy SEAFOAM. This will clean & clear the crud off of your O2-sensor. This should strighten your problem.

Posted on Jan 31, 2009

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SOURCE: 95 cadillac eldorado engine stalls rough idle check engine light is on

My son has this same car with the same problem. So far after tune up and other process of illimination, the problem points to the catalytic converter. If it is clogged you will get this problem with the rough idle and stalling. Look under the car at night after running it and see if the catalytic glows red. If so you need a new one. Hope this helps.

Posted on Mar 20, 2009

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SOURCE: 2004 f250 super duty diesel where is low side recharge port ac

on fords ussualy at reciever drier,if not follow large ac line till you find the schrader port.

Posted on Jun 18, 2009

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2 Answers

2003 F250 Super Duty diesel 6.0 needs multiple tries to start.


It is a Ford. Replace the fuel pump and check the fuel lines for leaks including any filters.

Nov 01, 2017 | 2003 Ford F250 Super Duty Crew Cab

1 Answer

2006 F250 Super Duty starts fine no lights or problem however recently it started to miss at idle and around 2000rpm. Oil changed this week and has proggressively gotten worse and now idle is very rough...


I'm not sure of engine liter size? How long since a tune-up? I always check for codes, even if lite isn't on. Some of the national brand auto stores will check codes for free, if there are any, just tell them your lite has been going on and off.
Use a gage and check proper fuel pressure. I can give you fuel pressure spec because I don't know liter size of engine? Some vehicles don't have Schrader valve on fuel rail, which makes checking fuel pressure a little awkward.
If you have electronic returnless fuel system, you have a fuel pressure sensor, hopefully on the fuel rail. The yellow wire should be for fuel pressure, engine idling, use digital multimeter on yellow wire. 3 volts = 43.75 psi. 2 volts about 20 psi less. 4 volts about 20 psi more, so you get the picture.
The basics for a rough idle, check for a leak of some kind, fuel--egr--vacuum leak.

Oct 30, 2017 | 2006 Ford F-250 Super Duty

1 Answer

Motor oil leaking into air to air intercooler


Check the oil line going from the oil pan to your turbo. Somehow the oil that is mean to keep the turbo lubed and cooled is blowing through the impeller into your engine... not good.

Sep 24, 2010 | 2001 Ford F250 Super Duty Super Cab

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2003 f250 diesel 6.0 hard start when cold, idles rough and dies. runs great once warmed up. Battery light is on but volts are 13.? Not sure if the 2 problems are connected or not


It sounds like your preheat system is not working properly on the cold startup. Haynes has a Diesel Engine Repair Manual, part #10330 that will help you correctly diagnose and repair.
Battery volts at 13 is good but a fully charged battery should be close to 14.2. It would be a good idea to get the alternator output checked and a load test done on the batteries.
Hope this helps.

Jul 12, 2010 | 2003 Ford F250 Super Duty Crew Cab

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F250 Diesel engine won't start in cold weather


check your glow plug relay! located on the right side head

Dec 27, 2009 | 2003 Ford F250 Super Duty Crew Cab

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2003 F250 6.0 diesel hit 5th gear and starts shaking when acclera


the mechanic should check on the electrical system of the car .the battery , the coils ,.the rotor the fuses , the starter solenoid , the sensor the spark plug and the distributor assembly. check for worn out and corroution . If there is then clean if not any more working then replace.loose connection also may be one cost of not warming. The fuel pump should also be checked and the idle to be adjusted for acceleration.The inter cooler do not have a problem with this it don't have a connection.It should not be touched.the surging when you place it to the fifth gear may be is about the quantity of the gas or fuel that is going to the engine when running.

Aug 21, 2009 | 2002 Ford F250 Super Duty SuperCab

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Engine misses at startup until engine warms


sounds like a bad injector take it to the dealer ship and have it checked out

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Ford f250 2005 with 6.0 diesel


I have a 2005 Ford F250 4x4 supercrew, When I first start the engine the truck has no power and will not run good until it warms up which takes about 5 mins. How do i fix this

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