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6.4L Power Stroke Diesel Engine fitted to 2008 - 2010 F250, F350 and F450 pickup trucks and F350 + Cab Chassis SPONSORED BY:

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  #1  
Old 07-02-2009, 09:47 AM
deadbug deadbug is offline
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The cac fix

For hesitation in rainy or humid weather.

My Question is if your experiencing it is that hurting our engine's or turbo's
etc.

Dealer has part on order for me won't see til next week but want to drive to Maine of coarse in the rain. go for it or I'm I hurting anything,
I could really man up and take the bike

Thanks,, Happy forth to you all as well
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Old 07-02-2009, 09:59 AM
R-T0r21on R-T0r21on is offline
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I see in your sign. that your truck is a job#1 which means that you've been driving in the rain for a while now. I don't know if it really hurts anything, but I really doubt that 1 more time will matter. I just had mine done. I drove in a little rain since then (not much though), and so far, so good.
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Old 07-02-2009, 10:14 AM
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Yea, she not a daily driver. I've had this truck since last October and never experienced the highway issue until the last month here with this lousy
weather.
The problem fits the tsb perfectly just never experienced it till recently.
So then I'm not sure if it actually does any damage to anything either.
I would imagine that would be a tough debate....
Screw it I'll just drive it
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Old 07-02-2009, 05:16 PM
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Joel Rusche Joel Rusche Joel Rusche
For what it's worth my truck has been doing the sputter and smoke dance for two years. I do lots of highway driving with trailers in tow and when the rain was out, I pushed the motor just as hard as usual. There have been many times when I actually pushed the motor harder making the condition really bad so that I could make something either break or throw a code. While it has been under warranty I have really tried to make as much stuff break as possible and nothing has. My engine is running strong and I have the new CAC and it's great. I think the engine runs even better with it.
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Old 07-02-2009, 06:48 PM
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I am now on the final leg from central Ca. through Nevada, Idaho, Wyoming, Montana, Washington and now in Oregon. I am pulling a fiver and have noticed much better performance with the new CAC.
In tow/haul it seems to pull much better with higher boost and less down shifting. Hand calculated fuel mileage has increased 1 mpg. Not sure if that is the result of the CAC or the engine getting broken in.
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Old 07-02-2009, 08:21 PM
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what is cac? my truck never has any problems with sputtering smoking or hesitating. do i even need one?
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Old 07-02-2009, 10:52 PM
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CAC = Charge Air Cooler.

Also known as an intercooler.

Cools the air coming out of your hot turbos before it goes into the engine. Since cooler air is more dense it increases the amount of air that goes into each cylinder, which increases the amount of power the engine can make, as well as lowering EGTs.

You don't need one because you already have one.
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Old 07-06-2009, 06:43 PM
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oh i know what an intercooler is and all that jazz just never heard it called a cac thanks though learn something everyday on here!
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Old 07-07-2009, 03:33 PM
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I had the same issue with my job 2 '08 and just had it replaced last week. Been raining a bunch here in the northeast this summer, so it was a noticable issue. I'm still not certain why/how the engine was creating the smoke? Was the original CAC sucking in the water and blowing it through the engine? OR were the fins on the original part two small/close and not allowing the CAC to cool the air down enough before pumping it back in the engine creating the smoking condition?

Either way, now I have a shiny black new CAC which should make the truck run better.
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Old 07-07-2009, 06:04 PM
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Quote:
Originally Posted by jlalanas View Post
I had the same issue with my job 2 '08 and just had it replaced last week. Been raining a bunch here in the northeast this summer, so it was a noticable issue. I'm still not certain why/how the engine was creating the smoke? Was the original CAC sucking in the water and blowing it through the engine? OR were the fins on the original part two small/close and not allowing the CAC to cool the air down enough before pumping it back in the engine creating the smoking condition?

Either way, now I have a shiny black new CAC which should make the truck run better.
From what i've been told the old design allowed condensation to develope on the inside of the cooler. This would slowly build up and after 20 min or so on the hwy if you jumped on the throttle or going up big hill with load then the high boost pressures would force all the moisture into your motor. Not sure how the new one resolves this but it seems to have somewhat more wider fin openings and has a much heavier / slick looking paint job.
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