Question about 2006 Ford F-250 Super Duty

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I have a F 250 6.0 that takes a little longer than it should to first start?

I have even waited a couple of seconds after the light for the glow plugs to go out but it takes a second crank before it starts.

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It sounds to me like your glow plugs are shot or just on there way. They do need replacing from time to time, especially when not given time to heat up properly watch for light on dash to go out be for cranking engine over. If after having them replaced problem isn't fixed, i would try a new fuel filter.

Posted on Dec 03, 2012

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Posted on Jan 02, 2017

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SOURCE: 2005 Ford F-250 6.0 PSD No Start

Seems like a low injector control pressure situation. You may see plenty of oil pressure on the gauge but the high pressure oil that opens the injectors is probably passing through a blown STC fitting at the back of the high pressure pump or something of that nature. Check for smoke out the tail pipe, if there's smoke, I could be wrong. If you checked the glow plugs (make sure you have 12 comming and going through the relay, just because it clicks does not mean it's working) than you more than likely have compression, the last thing you need is fuel. To get fuel you need high pressure oil. Your truck should have an ICP sensor on the right valve cover toward the front. You can back probe or make a breakout harness to pins... ok I don't know what two pins but there is only three. Anyway backprobe the sensor and see if you have more than .82V while cranking. If you do not, go to the IPR (injection pressure regulator) which is behind and below the turbo. It is a round solenoid valve sticking out of the high pressure oil pump. This valve will have the connector pointing down and toward the back of the motor in it's "weather protecting" position. You can rotate this valve by hand so the connector is easier to get to but don't force it and break it. You will then need to apply 12V and a ground to this valve. Do not supply the voltage for more than 120 seconds though or you could burn the valve up. with 12V to the valve see if it will start. If it will you may have a power supply problem to the valve. If none of this helps let me know, the rest of the troubleshooting is pretty involved.

Posted on Apr 16, 2009

warlock61
  • 659 Answers

SOURCE: 1992 Ford F250 7.3 Diesel hard to start

It is possible that some of the glow plugs might not be working. This will cause a hard start and smoking condition especially in cold weather.

Posted on Dec 24, 2008

  • 158 Answers

SOURCE: 1991 f350 7.3 diesel hard starting in am

you will find that it may be the glow plug timer is faultycausing the glow plugs not getting hot enough

Posted on Mar 18, 2009

  • 3 Answers

SOURCE: glow plug system will not cycle

Do you have dual fuel tanks? Place the return fuel line from the back of the fuel pump in a bucket and see if it will start. If yes replace the fuel tank switching valve. It may switch supply side ok, but not return side and if so it is plugging the return, which will cause a no start stuation. If it starts running the return line into a bucket replace the switching valve.

David Floyd
tnbroker1@yahoo.com

Posted on Feb 15, 2010

toneman2121
  • 775 Answers

SOURCE: 2004 F-250, 5.4l gas. Won't start or even crank.

are you referring to the starter relay on the firewall? the voltage should drop to 0 when measuring across the signal path because the connection is made, essentially making it a piece of wire and there is no difference in potential between the two points. is there 12v to the starter motor? is the starter solenoid (located on the starter) receiving 12v? check fuses and fusible links. disconnect hot leads from the starter. remove the starter, and supply 12v directly to the motor. does the pinon gear extend and spin? starter.

Posted on Apr 17, 2010

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F250 Diesel will not start cold . Has power to glow plugs for short time ,but will not start 1986 modle.


Hello philkatkiele: My name is Roger and I will help you. First thing you need to check is the glow plugs. They will need tested individually. Un plug all 8 glow plugs. Take a test light and hook end to the positive battery cable. Touch opposite end of test light to the terminal end of the glow plug. The test light should light. Touch all 8 glow plugs. Ant that do not light are bad and will need replaced. If glow plugs are burnt out then the controller will flash wait light to early or very fast. The wait light should be on for approximately 10 seconds.If al glow plugs check ok then I would suspect the glow plug controller as the problem. Also if the temperature out side is below 40 degrees the truck should be plugged in. This will help to make the engine start easier. Should you need further help please just ask.Please rate the answer as this way I know it was helpful. Thank You for using Fix Ya. Roger

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88 f250 diesel ticks hard pumps smoke still starts good and no power loss, took vavle cover off and everything looks ok wat should i check next wat would i look for if i was to pull injectors


The problem is the glow plugs are bad or not coming on. Even though the "wait to start" light comes on, the glow plugs may not come on. I have found when this happens, the light comes on for only 1-2 seconds and goes off. With the engine cold, the light should stay on for about 5 to 7 seconds. The colder the engine, the longer the plugs should stay on. There is one glow plug for each cyl. The plugs are in the "V" of the engine and screwed into head. Only one wire goes to the glow plug and the wire runs from one plug to the next on each bank. You test them by removing them and grounding the body and putting 12v positive to the terminal. The tip should glow red hot like a cigarette lighter. There is a glow plug relay behind the air intake horn which also could be the problem and there is a engine temp sensor in the circuit also.

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Glow plug system will not cycle


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Check the silver flat fuse on glow plug relay cover (driver inner fender/black plastic).

Make sure the two plastic connectors are clean and on tight.

There is one temp. sensor on the block. Near glow plugs 1 and 2.

Make sure the connector is on tight.


If the car starts after 5-15 seconds of glow time then you should be find.

It can be a burn out indicator or glow plug relay is on the way out.






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I just replaced the glow plug relay dur to hard starting


HAVE YOU REPLACED ALL YOUR GLOW PLUGS RECENTLY? EVEN THOUGH THE GLOW PLUGS APEAR TO BE WORKING I FIND WITH AGE THEY NO LONGER HEAT UP QUICKLY ENOUGH BEFORE CONTROLER TIMES OUT. THEREFOR CREATES A HARD OR NO START CONDITION.

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