Rough Cold Start

[powerstrokinfirefighter]

Some people like Rotella but most don't in a 6.0.. There are better 5W40 synthetic oil's for the 6.0, you may want to try valvoline extreme blue or schaeffer's.. Reading 6.0 oil related threads for the last seven years, not all 6.0's are happy with Rotella oil's.. Just a suggestion for the future..

I agree with this, I just needed an oil change, and couldn't find Extreme Blue anywhere. There are a few Cummins shops in the city that I'm going to get ahold of and see if they can get it. I'll definitely be using it on the next change

 

[Atsah]

I agree with this, I just needed an oil change, and couldn't find Extreme Blue anywhere. There are a few Cummins shops in the city that I'm going to get ahold of and see if they can get it. I'll definitely be using it on the next change

Any NAPA's around your area? They sell it..

 

[powerstrokinfirefighter]

I only thought there was one in town, and they didn't have any, but I found another another on the other side of town. I'm gonna take a look next time I'm down that way

 

[Atsah]

I only thought there was one in town, and they didn't have any, but I found another another on the other side of town. I'm gonna take a look next time I'm down that way

If they don't have it on the shelf, they will get it for you..

 

[Pro387p]

Hello all....my first post in this forum. I have a 2003 with a 6.0 and have been fighting similiar issues. When temps are below 50 degrees my truck is very sluggish untill engine is up to temp. If temps are in 30's or lower and not plugged in it is very noisey and irratic at first start, may take 15 minutes to warm up and run better, at times has even died when first started. Even plugged in it is still very sluggish until up to operating temp. Truck has MBRP 4" turbo back , workhorse 75 HP chip, Hypertech Tuner, and K&N cold air. Other than that it is all stock with 110,000 miles. Just started this fall.

Thanks!

 

[powerstrokinfirefighter]

Well I'd ditch the hypertech and the K&N quick. They're both no good. Sounds like you've got a stiction issue. Try some Rev X an see if it helps you

 

[Atsah]

Get rid of the oiled K&N and go back to stock (stock air filter on a 6.0 works perfect) unless your making big power.. The reason I say this is because not only do they not filter well, they will pull the oil into the tube and on the MAF and cause CEL 's and the tuner should go in the same trash can.. SCT in a 6.0 FWIW.. JMO and most other 6.0 owners opinion..

Any 6.0 I have had did not like leaving the driveway until it was warmed up for a few minutes.. My guess is you have injector spool valve sticktion and or a weak FICM. Make sure your batteries are working properly also.. FICM voltage should be 48V not cranking, cranking and key on.. Could also be a glowplug circuit issue but sticktion and FICM problems are more likely..

What oil do you use? 5W40 synthetic will give you the best cold weather results as I'm sure you have allready read in this thread..

 

[Pro387p]

I have always used Rotella...but yes have seen the other reply's regarding the oil. Just replaced both batteries also. This diesel stuff is new to me, we drag race a tube chassis camaro, bought the truck almost 2 years ago as a tow rig, but very impressed with the power with what little I have done to it! When it was stock I was very dis-appointed.
Thanks for the responses!!!

 

[CCRICE]

Well I'd ditch the hypertech and the K&N quick. They're both no good. Sounds like you've got a stiction issue. Try some Rev X an see if it helps you

This! Sct is the only way to go with the 6.0.


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