Cold start issue....do I still have a GPR problem?
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Joined: Mar 2006
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From: Eads, TN
Cold start issue....do I still have a GPR problem?
Couple of weeks ago I changed my GPR because it died. I changed it with a new GPR I bought from my local dealership. It fixed the issue immediately.
As of last week, my truck has not had a normal cold start up. When it cranks it stumbles for the first couple of seconds then runs fine. It also has a brief puff of white smoke upon start up, then clears up.
Testing the GPR, it reads 12.3 on the battery side, and after I turn the key to ON, the GP side reads 11.2. Is this drop acceptable or do I have another GPR issue? All connections appear to be tight.
As of last week, my truck has not had a normal cold start up. When it cranks it stumbles for the first couple of seconds then runs fine. It also has a brief puff of white smoke upon start up, then clears up.
Testing the GPR, it reads 12.3 on the battery side, and after I turn the key to ON, the GP side reads 11.2. Is this drop acceptable or do I have another GPR issue? All connections appear to be tight.
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Joined: Jun 2007
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From: Hampton, Maryland.
I think that is acceptable. How many miles are on your truck?
You said you get a little puff, then a stumble, then everything is good. Meaning it runs fine, you don't have to plug her in, she has good power even running cold, etc?
You said you get a little puff, then a stumble, then everything is good. Meaning it runs fine, you don't have to plug her in, she has good power even running cold, etc?
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Joined: Mar 2006
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From: Eads, TN
It's been somewhat cold this last week, but nothing too bad, maybe mid to upper 30's. Today when I started it the temp was 51*. So no need to plug her in yet. And yes, seems to run fine when cold.
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Joined: Mar 2006
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From: Eads, TN
Yep.....that was my next question. I run Rotella 15w40. Maybe an oil issue with the injectors being somewhat weaker with age and mileage?
I changed my oil about a month ago, and what my mechanic advised was to add about two quarts of Lucas oil treatment to the oil. I took his advise and I did. I've never added an additive to my oil in the past.
I changed my oil about a month ago, and what my mechanic advised was to add about two quarts of Lucas oil treatment to the oil. I took his advise and I did. I've never added an additive to my oil in the past.
Lead Driver
Joined: Jun 2007
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From: Hampton, Maryland.
No, with it being cold, the oil is obviously thicker on start up. What you are experiencing is called the "romps". If you go to synthetic 5w-40 you should see a reduction in that stumbling effect. How long have you owned the truck?
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From: Eads, TN
Last I had them checked was about a month ago trying to troubleshoot my ICP, which I replaced, they were fine.
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Joined: Jun 2007
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From: Hampton, Maryland.
I am guessing this is the first time you have noticed the romps then? I have an '03 and I am in Maryland just outside of Baltimore, where it isn't Canada cold, but it gets down in the 20's at night several times a year and we can occasionally see a 0 degree night or two. I have owned my truck since it had 64,000 miles, I believe, and by my first winter it had mid 70,000's probably. It always did what you are saying yours is doing when I was using 15w-40 oil and it got down in the 30's or colder for several hours overnight. If it clears up and runs good after a few seconds, I wouldn't be too concerned.
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Joined: Mar 2006
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From: Eads, TN
I wonder if this might be my issue with its starting issue?
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From: Eads, TN
I guess I need to change the filter as well? Also, do I need to rush out and change it immediately or can I wait till the next oil change? I bet I don't have three hundred miles on the last change.
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Joined: Jun 2007
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From: Hampton, Maryland.
I would get it out. I am not familiar with the down side of Lucas but if their own bottle says not o use the product you did, I wouldn't wait. I just spent $1400 on new ( remanufactured) injectors, $100 or so for an oil change is waaay better than that.
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Joined: Apr 2010
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From: South Shore, MA
I think you may be correct. I just read on back of the jug that for Ford Powerstroke engines to us their synthetic stabilizer oil treatment. Damn.....I hope I haven't hurt anything.
I guess I need to change the filter as well? Also, do I need to rush out and change it immediately or can I wait till the next oil change? I bet I don't have three hundred miles on the last change.
I guess I need to change the filter as well? Also, do I need to rush out and change it immediately or can I wait till the next oil change? I bet I don't have three hundred miles on the last change.
Also, it's probably worth switching to 5w40, at least for the colder months. It might help with the cold-start stumble.
I had cold start romps last year with a fully functioning GP system. I switched to 5w40 synthetic, and it solved my issues. I run it full time now. Some people switch back and forth 15w40 / 5w40 depending on the season in an effort to save some cash.
Yup. I agree. $100 isn't a big deal if you consider the possible alternatives.