Cold Natured 6.0?
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Cold Natured 6.0?
I'm considering buying a 2003 F550 6.0 automatic from the original owner. The truck has 88,000 miles and runs very good when warm but when it is first started (cold) it sounds like it is running on 3 cylinders and will barely move for the first 5 or so minutes. If you give it fuel it will move but not quickly. After a few moments it seems to run fine. The owner said it has always been "cold natured". He seems very honest and told me other things about the truck he did not need to, but this makes me nervous. Any advice or experience with this before? Sorry for no signature, this is my first time posting here. Thanks.
Post Fiend
Joined: Mar 2003
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From: Sarnia, Ontario, CANADA!
Originally Posted by jwey
I'm considering buying a 2003 F550 6.0 automatic from the original owner. The truck has 88,000 miles and runs very good when warm but when it is first started (cold) it sounds like it is running on 3 cylinders and will barely move for the first 5 or so minutes. If you give it fuel it will move but not quickly. After a few moments it seems to run fine. The owner said it has always been "cold natured". He seems very honest and told me other things about the truck he did not need to, but this makes me nervous. Any advice or experience with this before? Sorry for no signature, this is my first time posting here. Thanks.
-Matt
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Thanks for the responses guys. I'll ask about the fuel filter. The truck has an automatic trans. and while I was testing it out I pushed the tow mode button at the end of the shifter a number of times, the RPM's did not change a bit. Does that mean the tow mode is not functioning properly or is it something different?
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From: Hendersonville, NC
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Hey 390,
Thanks for the info. What is this CI-4+ that you mentioned, is it an additive or a type of oil? What does it do? Is there damage potential from this truck being run this way in the past? The owner told me he would start it in the morning and let it idle for 15 to 20 minutes before he would even move it. Thanks.
Thanks for the info. What is this CI-4+ that you mentioned, is it an additive or a type of oil? What does it do? Is there damage potential from this truck being run this way in the past? The owner told me he would start it in the morning and let it idle for 15 to 20 minutes before he would even move it. Thanks.
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Fleet Owner
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From: Brentwood,CA
Originally Posted by PSD 60L Fx4
Are you referring to the high pressure oil pump? These don't have an injection pump...
Yes sorry about that. i meant HPOP some oils can foam and give poor running characteristics. This is part of why the new CI-4+ oils are now made they also deal with shear and soot.
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From: s.f. bay area
Originally Posted by jwey
The truck has an automatic trans. and while I was testing it out I pushed the tow mode button at the end of the shifter a number of times, the RPM's did not change a bit. Does that mean the tow mode is not functioning properly or is it something different?
Senior User
Joined: May 2003
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From: california
i had a 03 and now a 04 and in the morning its horrible, i let mine idle for about 5 min then get in the truck n go. when its cold it runs like **** but when shes nice n warmed up she runs like a champ... good luck
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