PLEASE HELP! 2002 f250 7.3 won't start cold
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PLEASE HELP! 2002 f250 7.3 won't start cold
I have an issue with my 7.3.... the truck will not start if it sits overnight without being plugged in, even in 65 degree weather. It starts and runs with a rough idle for about 10 seconds after its been plugged in for an hour, after the rough idle is gone it runs great .. it will Stat back up as long as the truck is warm (70°+).... I've replaced the batteries, glow plugs, starter (it was going bad) and fuel filter. .. also replaced the gpr today. .... please help me out with ideas
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New User
Joined: Dec 2015
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Thanks for the reply, it's 45 degrees here, I didn't think the waxes started to harden until 32 or below, it is definitely due for an oil change, I have about 7000 on this go.... I normally run Rotella t series 15-40
Senior User
Joined: Jan 2013
Posts: 216
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I had a bad problem with cold hard starts and I replaced everything as well glow plugs, gpr, fuel filter, everything I could think of and I felt with hard starts, leaving the truck plugged in. Till this year I switched to 5 w 40 full synthetic and boy was it a world of difference on cold starts. It starts right up and don't have romps any more wish I would have done it sooner
Posting Guru
Joined: Sep 2014
Posts: 2,404
Likes: 3
From: Asheville-where weird is
All good info. 5W40 will be your best friend. Rotella T6 is preferred by some on here, while others prefer Mobile 1 Turbo Diesel or Valvoline Premium Blue.
Check out:
Used Oil Analysis - Bob is the Oil Guy - Bob is the Oil Guy
for more info.
Check out:
Used Oil Analysis - Bob is the Oil Guy - Bob is the Oil Guy
for more info.
Postmaster
Joined: Nov 2015
Posts: 4,807
Likes: 125
From: Colorado Springs
When you do the oil change add ARCHOIL 9100 ...full 16oz to the oil. I think I had a very bad case of stiction in the injectors so I ran some 10w30 Rotella with the Archoil for about 1000 miles then flushed it and the HPOP then changed to Rotella T6 5w/40 with another bottle of Archoil. It has completely changed my truck cold starts and how it idles/runs.
The truck started Saturday at 12* without being plugged in which was huge. I'm pretty sure I need injectors but this is helping.
The ar6200 included in the link will help the fuel side of the injectors. I also used their 6400D (cleaner) with the 6200... Can definitely tell there's a difference!!
Archoil AR9100 16oz and AR6200 8oz Kit! Perfromance Bundle! Powerstroke! Friction Modi... https://www.amazon.com/dp/B00WAK0QXE..._UbAGwbFG680S2
Hope this helps!
The truck started Saturday at 12* without being plugged in which was huge. I'm pretty sure I need injectors but this is helping.
The ar6200 included in the link will help the fuel side of the injectors. I also used their 6400D (cleaner) with the 6200... Can definitely tell there's a difference!!
Archoil AR9100 16oz and AR6200 8oz Kit! Perfromance Bundle! Powerstroke! Friction Modi... https://www.amazon.com/dp/B00WAK0QXE..._UbAGwbFG680S2
Hope this helps!
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Senior User
Joined: Jan 2012
Posts: 224
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From: Somewhere in Virginia
When you do the oil change add ARCHOIL 9100 ...full 16oz to the oil. I think I had a very bad case of stiction in the injectors so I ran some 10w30 Rotella with the Archoil for about 1000 miles then flushed it and the HPOP then changed to Rotella T6 5w/40 with another bottle of Archoil. It has completely changed my truck cold starts and how it idles/runs.
The truck started Saturday at 12* without being plugged in which was huge. I'm pretty sure I need injectors but this is helping.
The ar6200 included in the link will help the fuel side of the injectors. I also used their 6400D (cleaner) with the 6200... Can definitely tell there's a difference!!
Archoil AR9100 16oz and AR6200 8oz Kit! Perfromance Bundle! Powerstroke! Friction Modi... https://www.amazon.com/dp/B00WAK0QXE..._UbAGwbFG680S2
Hope this helps!
The truck started Saturday at 12* without being plugged in which was huge. I'm pretty sure I need injectors but this is helping.
The ar6200 included in the link will help the fuel side of the injectors. I also used their 6400D (cleaner) with the 6200... Can definitely tell there's a difference!!
Archoil AR9100 16oz and AR6200 8oz Kit! Perfromance Bundle! Powerstroke! Friction Modi... https://www.amazon.com/dp/B00WAK0QXE..._UbAGwbFG680S2
Hope this helps!
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Lead Driver
Joined: Jun 2007
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From: Hampton, Maryland.
How long are you letting the glow plugs "do their thing"? If you are only using the WTS light, that isn't enough when it is cold out. Try letting them cycle for 45 seconds or so before engaging the starter.
New User
Joined: Jun 2016
Posts: 9
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From: 4 trailer park rd temagam
Did you test for power at the intake heater and glow plugs it could be the solenoid has gone bad
Post Fiend
Joined: Mar 2015
Posts: 5,277
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From: Blairsville, Pennsylvania
Hi Dillion7.3 and welcome to FTE!
Here's a thread where I went through a complete "test" to show the difference in the oils.
https://www.ford-trucks.com/forums/1...l#post16192687
Oh- and unless you are running a bypass filter, don't go past 5k on the oil. Your truck will hate you for it, LOL.
Good luck, you should notice an immediate difference with synthetic 5w-40w
Here's a thread where I went through a complete "test" to show the difference in the oils.
https://www.ford-trucks.com/forums/1...l#post16192687
Oh- and unless you are running a bypass filter, don't go past 5k on the oil. Your truck will hate you for it, LOL.
Good luck, you should notice an immediate difference with synthetic 5w-40w
Fleet Mechanic
Joined: Aug 2006
Posts: 1,465
Likes: 17
From: Jacksonville, FL
Originally Posted by Kenmc
It not good to switch to a synthetic oil your seal's are set for normal oil run 10 w30 if anything
New User
Joined: Jun 2016
Posts: 9
Likes: 0
From: 4 trailer park rd temagam
I tried it my self along time ago and I lots of leaks when I change back they all went away