Engine shudder… What is the latest TSB?
07-18-2014, 07:19 PM
#11
For those who may not know, Eco tuner is tuner boost.
From:
https://www.f150forum.com/showpost.p...5&postcount=84
Originally Posted by Tuner Boost
Absolutely have proven this. The water accumulating in the CAC has no relation to rain or summer heat and humidity as it is not collecting int he CAC from the outside air alone. It is only what is released in the combustion process during the extreme pressure and heat. Just as we see with our air compressors, and these are 80 gal industrial units. If it is not under 120-1980 PSI of pressure, just air in a tank does nothing. It is through the intense compression and the heat generate during this that causes it to separate and condense/collect in the tanks, and we drain this daily as all machinery here uses compressed air in some form. Take a CAC and a high volume air blower and run it all day long.....all week long and zero water will collect in it.
The water we are seeing is what is released during the combustion process and while 99% plus is expelled out the exhaust, some enters the crankcase via blow-by past the rings. this is what needs to be constantly and immediately evacuated through the IM vacuum and thus burned through the combustion process BEFORE it can accumulate and condense in the crankcase as it does in the EB due to the lack of evacuation except at idle and low throttle. If this was NOT the case, then we surely would still be getting water accumulation in the CAC after the RX crankcase evac fix, correct? So if your theory is correct as you keep insisting, please answer me this question.....why after the RX system is installed dies the CAC no longer collect ANY liquids? And why in all the millions of other turbo systems with proper PCV systems do they accumulate little or none as well?
So, NO rain has nothing to do with it as I went over and over in my long post yesterday.
Please read (as you claim you do, but still ask the same questions over and over....and if your not persecuting, what the heck is this?
The water we are seeing is what is released during the combustion process and while 99% plus is expelled out the exhaust, some enters the crankcase via blow-by past the rings. this is what needs to be constantly and immediately evacuated through the IM vacuum and thus burned through the combustion process BEFORE it can accumulate and condense in the crankcase as it does in the EB due to the lack of evacuation except at idle and low throttle. If this was NOT the case, then we surely would still be getting water accumulation in the CAC after the RX crankcase evac fix, correct? So if your theory is correct as you keep insisting, please answer me this question.....why after the RX system is installed dies the CAC no longer collect ANY liquids? And why in all the millions of other turbo systems with proper PCV systems do they accumulate little or none as well?
So, NO rain has nothing to do with it as I went over and over in my long post yesterday.
Please read (as you claim you do, but still ask the same questions over and over....and if your not persecuting, what the heck is this?
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itguy08 (07-18-2014)
07-20-2014, 08:37 PM
#13
Got my pickup back... All they did was change the catalytic converter and give me my pickup back. I asked about the shudder on acceleration and was told it could of been caused by the bad cat… I asked what may have caused the cat to go bad and the service person told me it may have just been a bad one.
Any ideas from you guys as far as to what may have caused the cat to go bad?
Any ideas from you guys as far as to what may have caused the cat to go bad?
07-20-2014, 10:13 PM
#15
A bad cat is generally on outcome of a misfire dumping unburned gasoline into them. It is an effect, not a cause, in most cases. That said, it could also cause the issue independently if it was a factory dud.
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itguy08 (07-21-2014)
07-21-2014, 10:04 AM
#16
Cats can fail from un burnt fuel hitting the red hot catalyst core, but more likely is when a slug of the water/fuel/oil/etc. accumulating in the CAC from the PCV system flaw is pushed through hits it. The core will break apart and fold in on itself clogging.