Question about 2005 Ford F 350 Super Duty

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6.0 diesel hard to start cold then runs rough until it warms up

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Most likely bad fuel injectors or a bad ficm

Posted on Jan 20, 2011

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Posted on Jan 02, 2017

jfh1
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SOURCE: 2000 beetle cold start rough idle until it warms

Could be the fast idle sensor check to see that the vacume line is hooked up properly.

Posted on Mar 17, 2010

  • 180 Answers

SOURCE: F250 Diesel engine won't start in cold weather

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

Posted on Mar 19, 2010

  • 2002 Answers

SOURCE: 2003 f250 diesel 6.0 hard start when cold, idles

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.

Posted on Jul 12, 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

  • 2002 Answers

SOURCE: 7.3 diesel very hard to start in cold weather not

It sounds like your glow plug system is not working properly. There are a number of pieces to it. I would be looking at the glow plugs first. Remove the lead from the glow plug and measure Ohms by putting the positive lead on the terminal and negative to the case. Any plug that measures more than 2 ohms needs to be replaced. If they are okay then measure volts from the wire going to the glow plugs. BE CAREFUL not to let that wire touch ground, it will short out a lot of expensive stuff. With the key on measure voltage between the glow plug wire and the plug. There should be a minimum of 11 volts. If you don't get tis reading then you need to do more diagnosing. For that Haynes Diesel Engine Repair Manual, part #10330 will help you get it figured out. It has a step by step section for diagnosing glow plugs for your engine. It would be well worth the $20. In the meantime keep it plugged in to stop undue stress on your engine. Hope this helps.

Posted on Feb 01, 2011

Testimonial: "thank you i will pick up that book and check into the glow plugs"

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1 Answer

Hard starting, rough idle when cold, then smooth running when warm


Need year/make/model/mileage of vehicle to provide a more specific set of troubleshooting steps.

When was the last tune up? Hard starts when cold are usually caused by fouled spark plugs, worn plug wires, or weak ignition coils. Fuel systems are not as effected by temperature changes as the ignition components.

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2000 beetle cold start rough idle until it warms


Could be the fast idle sensor check to see that the vacume line is hooked up properly.

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

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We think it is the diesel injection pump but not sure


Sounds like not all the glow plugs are working.It should run fairly smooth on a cold start if all of the glow plugs are working..Also you shouldn't drive off on a cold start with a diesel,Its really hard on the motors..At least give them 10 to 15 min on a cold start..The oil in them is a really thick oil and when there drove on a cold start theres no oil lubricating the internal parts and will cause the motor to seize up..You may already no this and dont mean you drive it as soon as you start it i just wanted to let you know..When you get alot of white smoke it could be two things,Theres water in the fuel which will make it not have much power die and smoke..But if it runs fine when its warm theres some bad glow plugs...Hope this helps you and have a great day

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Engine runs rough on cold start warm ok


without more details about your truck it's hard to give you a reliable diagnosis. a common problem on a high mileage engine would be fuel injectors leaking fuel while the engine is off, causing a rough run until excess fuel is burned off

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Hard starting diesel, at approxamately anytime temp gets below 45 degrees F. runs rough when started, smokes, then once warmed up no problem. Has quit on me twice in traffic.


only 2 things can maake a diesel run rough at start up ,,1--- air in the system 2----- 1 or more of the glow plugs not working. this sounds like the latter ,if you have a couple of glow plugs not working ,it will miss on those cylinders until it warms up ,and the smoke is mostll exesive fuel when it does fire . recommend you check the glow plugs

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1992 gmc sierra turbo diesel starts and idles fine until warm up


It's time for a Italian tune up!

The blue smoke can be one of two thing.

oil drop from the valve stem (from engine head to cyclinders)
or
diesel soot collect inside the exhaust system.

===
I will take a 5-10 minutes high rpm (not redline) ran on the highway.
Pay close attention to the rear view mirror and look for black diesel soot.
=== I will use Diesel Cleen or similar product to condition the fuel. (keep moisture down)
Use the recommended amount of SEAFOAM oil additive to condition the valve stem seal/rubber parts.

I can not rule out excessive blown by.
Can you get a diesel compression tester?
When was the last valve adjustment?

Please post the actual odometer on the engine and I will follow up on it.

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4 Answers

When car is cold it seemingly runs on 3 cylinders


seem like you got the same problem as my scion xa, check the fuel pressure regulater. bad regulater some time smell like leak gas. auto zone might cause you about $80.00.

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Engine trouble


there is a cold start fuel heater in the inlet maifold try to see if thers power to it first if so just replace it should sort your prob
andy

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