loud noise while acclerating
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Junior User
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loud noise while acclerating
i Have a 1986 F-250 6.9 liter turbo diesel, when i am accelerating it is a loud noise like a loud exhaust sound but it is not the exhaust, then it will go away if i let off the gas. Please if you know anything please it would be greatly appreciated.
Post Fiend
Joined: Nov 2003
Posts: 21,285
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From: Nutter Fort, WV
IDI turbos don't make a lot of noise when they are working right.
Without knowing what the boost level is, it could be several things you are hearing.
I lean toward boost because you said only while you are giving it throttle.
Boost is the highest when your throttle is on the floor.
Even though the RPM does not drop when you take your foot off the throttle, as soon as you stop feeding it fuel the boost drops to almost zero.
Without knowing what the boost level is, it could be several things you are hearing.
I lean toward boost because you said only while you are giving it throttle.
Boost is the highest when your throttle is on the floor.
Even though the RPM does not drop when you take your foot off the throttle, as soon as you stop feeding it fuel the boost drops to almost zero.
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Junior User
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The Noise is coming from underneath the floor board like near the gas pedal but it doesn't seem like you can hear it from the outside the truck very well to at all
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Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 16
From: Nutter Fort, WV
Is the down pipe still attached to the turbo?
Some of the IDI turbo connections for the downpipe are not that great.
My 093 turbo has a bracket about 1/2 way down the down pipe that holds it in the turbo.
Yes, I have had the bracket come loose and the down pipe fall out of the turbo.
Also there is not much room in there, if the down pipe is hitting the firewall it will make a racket.
Some of the IDI turbo connections for the downpipe are not that great.
My 093 turbo has a bracket about 1/2 way down the down pipe that holds it in the turbo.
Yes, I have had the bracket come loose and the down pipe fall out of the turbo.
Also there is not much room in there, if the down pipe is hitting the firewall it will make a racket.