So I got a letter today on my 2011 cab/chassis about the 16B24 CSP. The only explanation was about "certain operating conditions possibly causing turbo damage". This could result in engine noise, reduced power and or illumination of the service engine soon indicator.

Anyone know what this is about???

 

I have not gotten this letter yet, but what you describe sounds like they might be doing something about the cheap cold air tube?

 

It did say "Ford has authorized dealer to reprogram the power train control module"

Truck has always run perfectly and has 50k on it, sure hate to have anything changed. I just drove it yesterday, 45 miles and 18.4 mpg at 60 mph.

However it also states "Ford can deny coverage for any vehicle damage that may result from failure to have the service action performed as soon as possible".

Truck couldn't possibly run any better, sure wish I knew a whole lot more about this

 

I have a 2011 F-550 based Earthroamer with 100K miles. Got the letter and just had it done this morning. The little test drive following the update did not reveal anything dramatic. It has run and is still running very well and I did push the heat driving a steep mountain road full throttle climbing 3000 feet. No issues, no apparent reduction of power. Although the outside air temp was over 90 degrees and the AC was on full too, it appears to manage heat better (coolant heat swings seem smaller/smoother) also, the EGT1 sensor did not go much over 900 degrees. I have seen it go over 1000 degrees with less load.

So for now, I am fine with it.

Oh btw: I have a new turbo and a new DPF (as of 20K miles ago)

 

Did you notice any turbo changes??

 

Well, after driving a bit more I noticed a definitive reduction in fuel mileage. Already the previous update about 6 months ago, after which the truck ran the best ever, resulted in about 1 MPG reduction of fuel mileage (on my truck). It appears with the new strategy that full throttle injects more fuel that it did before the update, light foot - does not seem much different. As far as the turbo is concerned, it seems the peak pressure may be around 1 pound lower than before (on average) however, on full load with EGT temps approaching low to mid 900 degrees, the turbo pressure is higher on average than it used to be.

I suppose the reason for the update is to reduce peak EGT temps (pre-turbo) to prevent melting/burning off the turbo blades. I have not been able to get the EGT1 temps to go over 1000 degrees since the update. Prior to it, I have never seen EGT1 temps reaching 1100 degrees under continued full load. I am not sure where Ford wants those temps to be limited to since I can't see the pre-turbo EGT values. On the 2008 (6.4L) the pre-turbo temps easily reached 1350 degrees at which point the engine power was limited to prevent burn-up.

However, the update also changed the transmission. Acceleration appears to be smoother and as good or better all the way up to 70+. Stand-still take-off delay still the same old. I also noticed the gear choices/RPMs are a bit more agressive on maximum loads. The result, better acceleration and speeds going up hill, but at instant MPGs less than 3!! (Not sure I have ever seen them that low).

I think the richer fuel mixture helps the exhaust temps to stay lower at full load, but it will end up stuffing up the DPF quicker for sure.

Oh well, I am sure Ford does not care if their older models burn more and more fuel. It may add to the incentive to buy new trucks

 

Thanks for a very nice report on your experiences. I never drive over 60 and the truck, with a 4.10LS rear end in just don't like to drive any faster, and besides, I'm just happy pulling the 5th wheel at that speed. I might just forget the whole update, don't know if it's with it. The truck is in the garage and will see very little use until next summer.

 

In all of the affected vehicles, the powertrain control module (PCM) strategy may not protect against some operating conditions that can result in fatigue of the turbocharger turbine blades. If operated under these conditions for prolonged periods of time, turbocharger damage can occur and may result in engine noise, reduced power and/or a malfunction indicator lamp (MIL) on with diagnostic trouble codes (DTCs) for low boost performance.

Jiminy Cricket! While FMC does not elaborate on the "operating conditions" damage to the turbocharger could occur I would think you would want protect your engine from this happening... we have seen turbine wheel blades with cracks and missing pieces.

Maybe it's just me.

 

I've never seen my turbo pressure go very high, but like I said I don't ever drive over 60 mph even when not towing. I guess I could wait and see if more info unfolds about this program. I suppose this program is specific to the turbo found only on cab/chassis trucks.