2001 5.4l engine - ever so slightly rough at idle or when stopped and in gear
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Senior Member
Joined: Jul 2020
Posts: 121
Likes: 3
From: Portland, Oregon
don't forget to evaluate the vacuum hose over by the battery???...that goes to the a/c unit.. about 6" piece IIRC ..1/4" hose. 
I also recommend using zipties (as hose clamps) for the 2 large hoses attached to the air intake . Do not recall what they are ...lol... but they are 5/8" or 3/4".
I just did an intake swap on my 5.4. From a coolant leaking plastic to a 1999 ALUMINUM ...runs like a sewing machine now (about the same amount of power too...
) Not bad for 285,000 miles....it's tired but dependable!
I also recommend using zipties (as hose clamps) for the 2 large hoses attached to the air intake . Do not recall what they are ...lol... but they are 5/8" or 3/4".I just did an intake swap on my 5.4. From a coolant leaking plastic to a 1999 ALUMINUM ...runs like a sewing machine now (about the same amount of power too...
) Not bad for 285,000 miles....it's tired but dependable!that I have attached?
Senior Member
Joined: Dec 2006
Posts: 43,542
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From: Joplin MO
I believe he's referring to the little hard vacuum lines that are *behind* the battery that go to the climate control system. Remove the battery to see them. There's an accumulator back there too.
However, if there's a problem with them, the climate control system usually doesn't work right - airflow stuck on defrost or going to defrost under low vacuum conditions.
However, if there's a problem with them, the climate control system usually doesn't work right - airflow stuck on defrost or going to defrost under low vacuum conditions.
Thread Starter
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Senior Member
Joined: Jul 2020
Posts: 121
Likes: 3
From: Portland, Oregon
I believe he's referring to the little hard vacuum lines that are *behind* the battery that go to the climate control system. Remove the battery to see them. There's an accumulator back there too.
However, if there's a problem with them, the climate control system usually doesn't work right - airflow stuck on defrost or going to defrost under low vacuum conditions.
However, if there's a problem with them, the climate control system usually doesn't work right - airflow stuck on defrost or going to defrost under low vacuum conditions.
Gotcha. Well... my climate controls are all working perfectly.
I have a new fuel filter but I need to buy the specialty tool to remove it from the fuel line or vice versa.
As I was driving the truck around town today I got to wondering if this not quite perfectly smooth idle would feel this way if there was one or more worn and even broken Motor Mounts?
Its like what I might call a Blip of a miss, not like if the engine had a miss but a very mini me version of one, yet the engine is running well. I could say that of all the vehicles I have driven in the past 20 years, this one is Not perfectly smooth like all the others were. I would really like to know if this is normal or abnormal for these 2 valve ford engines?
