Chuffing
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Freshman User
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Chuffing
I have a '04 F-350 6.0. On acceleration at times it will "chuff" and lose power - did it a lot today when pulling a load but will do it at odd times with no load. Also smokes.
Any thing I should be checking?
Thanks, Bill
Any thing I should be checking?
Thanks, Bill
Cargo Master
Joined: Dec 2007
Posts: 2,196
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From: Carstairs Alberta
could be a sticky egr valve, its in the front of the intake manifold next to where the air tube comes from the intercooler. pulll it out and clean it, check for free movement, when they're real bad you may have to pull intake manifold and steam it out
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Joined: Aug 2007
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From: Lakewood, Ca.
Could also be that the turbo is overboosting due to sticking vanes. The "chuff" noise is excess boost venting through the intake.
This is a great thread from the 6.0 tech folder sticky on the care and feeding of our VGT turbos - it has all you need to know:
https://www.ford-trucks.com/forums/8...urbo-abcs.html
This is a great thread from the 6.0 tech folder sticky on the care and feeding of our VGT turbos - it has all you need to know:
https://www.ford-trucks.com/forums/8...urbo-abcs.html
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Bill, are you still under warranty? How many miles?
Mine did this, problem solved when they replaced the turbo guts (center hub rotating assembly), the vanes were rusty and sticking. Cleaning the EGR won't hurt, but consider turbo vanes also.
Good luck, it took the techs here about 18,000 miles to figure mine out, dumb me.
Mine did this, problem solved when they replaced the turbo guts (center hub rotating assembly), the vanes were rusty and sticking. Cleaning the EGR won't hurt, but consider turbo vanes also.
Good luck, it took the techs here about 18,000 miles to figure mine out, dumb me.
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I took out the EGR valve and cleaned it up and reinstalled. Also changed the fuel filters - they were pretty black!
I have almost 21,000 miles so both were over-due. Will see how it operates when I get it out this week.
Thanks, Bill
I have almost 21,000 miles so both were over-due. Will see how it operates when I get it out this week.
Thanks, Bill
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Fleet Owner
Joined: Nov 2003
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Don't wait that long next time on the fuel filters. You are flirting w/ injector repair bills. 10k filter change intervals is a good thing to get in the habit of. Also - many good threads in the Tech folder that can help you avoid problems in the future.
You might want to start here:
https://www.ford-trucks.com/forums/7...-problems.html
You might want to start here:
https://www.ford-trucks.com/forums/7...-problems.html
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followup
Just a bit to let all know that I got the turbo off and cleaned up - it was stuck - actually it was the "unison ring" that was frozen by its inner perimeter.
The two front bolts came out fairly easy but the one at the back was a real "bugger" - naturally! Mine is in horizontal, like the others. Finally got it by taking the downpipe loose from the cat and that allowed it to move up enough to get a longer ratchet on the bolt.
Getting it out was no problem with all the advice. I would recommend a top creeper to do all this work!
It cleaned up well and went back in about as easy as coming out - except for the last quarter-inch, but that finally made it and the turbo slipped right in.
I didn't tighten one connection on the compressor outlet quite good enough so it blew off on the first test run.
Thanks to all for the super help and site. Bill
The two front bolts came out fairly easy but the one at the back was a real "bugger" - naturally! Mine is in horizontal, like the others. Finally got it by taking the downpipe loose from the cat and that allowed it to move up enough to get a longer ratchet on the bolt.
Getting it out was no problem with all the advice. I would recommend a top creeper to do all this work!
It cleaned up well and went back in about as easy as coming out - except for the last quarter-inch, but that finally made it and the turbo slipped right in.
I didn't tighten one connection on the compressor outlet quite good enough so it blew off on the first test run.
Thanks to all for the super help and site. Bill
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