Poor Accel. Collapsing intake tube?
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Poor Accel. Collapsing intake tube?
I have a '96 F250 PSD with a 5sp and 220K. I have excellent accelleration when cold, but the warmer the engine gets the worse the accelleration gets. After a 10 minute stop the accelleration is absolutely terrible, but gets a little better after a little driving. I've replaced the IAT, EOT and fuel filter. Changed the oil twice (Rotella T and Motorcraft) and added the fleetrite defoamer. I do read a code P1211, but no other symptoms that typically go along with this code. I have not yet driven it after clearing the codes to determine if it comes back. As far as I can tell the problem is directly related to temperature. This is the only driveability problem with the truck.
I heard there was a problem with the air intake tube collapsing under accelleration on 95-97 powerstrokes causing poor accelleration. It may be a long shot, but I'm wondering if the tube could become more plyable after it warms up in the engine compartment making it easier to collapse. It's kind of difficult to see if the tube is collapsing while I'm accellerating, but I'm out of ideas.
Has there been an upgrade for the subject tube?
Thanks for any help.
I heard there was a problem with the air intake tube collapsing under accelleration on 95-97 powerstrokes causing poor accelleration. It may be a long shot, but I'm wondering if the tube could become more plyable after it warms up in the engine compartment making it easier to collapse. It's kind of difficult to see if the tube is collapsing while I'm accellerating, but I'm out of ideas.
Has there been an upgrade for the subject tube?
Thanks for any help.
Logistics Pro
Joined: Jul 2001
Posts: 4,137
Likes: 41
From: Marble Falls, Texas
If your intake tube is colapsing, you have some major restriction going on. Dirty air filter? If I thought that was my problem here is what I would do. (Remember, just my opinion.) I would pull the lid off the air filter, and pull the lid out of the hose. If it ain't dusty where you are, run it down the road... see what happens. If it accelerates good, you know what the problem is. At that point I would just invest in a Tymar intake. Just my thoughts.
RubberDuck
RubberDuck
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The air filter is new too. I doubt it's the tube collapsing. I just can't think of what else it could be. My next step is probably to start replacing the ICP sensor or IPR valve, but that doesn't really explain why acceleration is worst after a 10-15 minute stop.
Thanks for the suggestion
Thanks for the suggestion
