6.4 powerstroke. Runs bad below 42 degrees. Help Please!
#1
6.4 powerstroke. Runs bad below 42 degrees. Help Please!
MY dad has an 08 6.4L powerstroke. When the outside air temprature hits at or below 42 degrees farenheit, the truck acts as though it is in its warm up mode. Boost will not go above 25 pounds and engine makes alot of diesel clatter. As soon as the outiside air temprature goes above 42 degrees the engine runs great. We have had it to several dealers and they all say nothing is wrong with it. But there definately is. There is no check engine light or codes stored in the system. Can anybody please help us??
#5
Right. But What Im trying to figure out is why I constantly thinks that. All the IAT and coolant sensors read normal. This started after a reprgram of th PCM by the dealership. Since then its been reprogramed several times for update purposes.
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#8
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this won't change anything. its not a programming issue. i thought the same thing but was assured by the big dogs in engineering that it isnt. the winterfront is the only fix
#9
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Is he running biodiesel? I know nothing about Diesels but Biofuel can gel up if it gets too cold depending on the feedstock used. A fuel line heater would help in that situation.
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u should see what an IAT sensor is worth and change it, just to rule that out. i think theres two of them. and maybe an exhaust back pressure sensor, the clanging is just the computer changing the timing because a sensor of some sort is telling it to.....not sure what the iat sensor is worth but i think i paid a little over $150 CDN for the EBP sensor when it went.
EDIT
When my ebp sensor went on me, it was usually the colder days it acted worse and it caused all kinds of funky issues with the engine, but no engine light. i had a winterfront on it and it still made all kinds of clatter/clanging, boost would go all the way to 53psi and ive never seen it that high driving it hard even on the SCT tunes, and it still had no power, started making the tranny shift funny....these trucks really seem to have a mind of their own.
....never noticed the date of the last post
EDIT
When my ebp sensor went on me, it was usually the colder days it acted worse and it caused all kinds of funky issues with the engine, but no engine light. i had a winterfront on it and it still made all kinds of clatter/clanging, boost would go all the way to 53psi and ive never seen it that high driving it hard even on the SCT tunes, and it still had no power, started making the tranny shift funny....these trucks really seem to have a mind of their own.
....never noticed the date of the last post
Last edited by Fast 5.3; 01-02-2014 at 03:01 AM.
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