Shudder problems
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Fleet Owner
Joined: Aug 2005
Posts: 23,666
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From: Easton,Ks
Shudder problems
I have a 1995 F150 5.0 A/C 4R70W with a shudder problem.
It happens at 1500 RPM while driving or parked.
Take the serpentine belt off and no shudder at 1500 RPM.
Replaced fan clutch and that did not change it at all.
Engine idles very smooth with no shudder until you raise the RPM and then the bad shudder at 1500 RPM, above this RPM the engine is smooth again.
I am thinking Air Pump, does anybody have any other thoughts.
It happens at 1500 RPM while driving or parked.
Take the serpentine belt off and no shudder at 1500 RPM.
Replaced fan clutch and that did not change it at all.
Engine idles very smooth with no shudder until you raise the RPM and then the bad shudder at 1500 RPM, above this RPM the engine is smooth again.
I am thinking Air Pump, does anybody have any other thoughts.
Thread Starter
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Fleet Owner
Joined: Aug 2005
Posts: 23,666
Likes: 301
From: Easton,Ks
Originally Posted by quicklook2
water pump?
Originally Posted by quicklook2
does air pump seem loose or making any noise?
Postmaster
Joined: Oct 2006
Posts: 4,816
Likes: 1
From: Davis & Newcastle, CA
Yeah I would follow quicklook's procedure for all of the pulleys. Move them up/down and side-to-side. Any that have a lot of play could be your culprit.
Does it do it with both the A/C on and off? ie, the A/C clutch both engaged and disengaged.
-Chris
Does it do it with both the A/C on and off? ie, the A/C clutch both engaged and disengaged.
-Chris
Last edited by Skandocious; Jun 12, 2007 at 12:14 PM.
Post Fiend
Joined: May 2004
Posts: 11,289
Likes: 6
From: Lakewood, Ohio
my bearing went bad in my water pump and the belt started moving front and back a little on the w.p. pulley.
had a strange vibration if i remember right.
had a strange vibration if i remember right.
Last edited by quicklook2; Jun 12, 2007 at 12:18 PM.
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