vibration at idle
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vibration at idle
02 7.3 vibration at idle in park. feels like a miss @1200rpm rattly under a load. started after being up on a lift getting new tires. very noisy at idle, starts very hard feeling. like the starter is trying to throw the engine out of the engine bay. no worse when driving feels really strange everything in the cab rattles at low rpms when under a load.HELP!!!
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Joined: Jun 2005
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From: Connecticut
Not sure if this will help you 
<dl><dt> F-series driveline vibrations/excessive u-joint angles: Note: See rear height concern above.</dt><dd> From take-offs under moderate to hard accel 4X2 and 4X4 with two-piece driveshafts:
Inspect the center bearing bracket for correct part or damage and replace as required. If the vehicle is used unloaded over 50% of the time, shim the center bearing braket down 3/4" using three E0TZ-4A209-A shims or flat stock and secure with adequate-length bolts with Loctite. If it is used more than 50% of the time loaded, evaluate the sudder with the vehicle loaded--shimming may not be desirable. If the shudder is still unacceptable in either case and the truck is an "XL", replace the driveline with one from an "XLT" of the same wheel base.
On deceleration from 60-30 MPH 4X4/ 137" and 142" wheel base (may be interpreted as a bearing noise):
Inspect the rear axle/spring spacer block. Single cardan joint driveshat axles use a flat spacer. Double cardan driveshaft axles use a wedge-shaped one; the block should measure 3 7/8" to the front and 3 5/8" to the rear. If these measurements are reversed, the blocks need to be swapped side-to-side.</dd></dl>
<dl><dt> F-series driveline vibrations/excessive u-joint angles: Note: See rear height concern above.</dt><dd> From take-offs under moderate to hard accel 4X2 and 4X4 with two-piece driveshafts:
Inspect the center bearing bracket for correct part or damage and replace as required. If the vehicle is used unloaded over 50% of the time, shim the center bearing braket down 3/4" using three E0TZ-4A209-A shims or flat stock and secure with adequate-length bolts with Loctite. If it is used more than 50% of the time loaded, evaluate the sudder with the vehicle loaded--shimming may not be desirable. If the shudder is still unacceptable in either case and the truck is an "XL", replace the driveline with one from an "XLT" of the same wheel base.
On deceleration from 60-30 MPH 4X4/ 137" and 142" wheel base (may be interpreted as a bearing noise):
Inspect the rear axle/spring spacer block. Single cardan joint driveshat axles use a flat spacer. Double cardan driveshaft axles use a wedge-shaped one; the block should measure 3 7/8" to the front and 3 5/8" to the rear. If these measurements are reversed, the blocks need to be swapped side-to-side.</dd></dl>
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not a driveline problem. it does all this stuff in PARK in my driveway. glanced at the exhaust, will take a bettter ,closer look today thanks guys. still lookin for any other ideas before i take it to "dealer"
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From: East Peoria, IL
im willing to bet its your exhaust like others have said, especially if its aftermarket
check your down pipe to make sure its not coming in close contact with something like a crossmember or the heatshield or any other of the pipes
check your down pipe to make sure its not coming in close contact with something like a crossmember or the heatshield or any other of the pipes
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I'm a newby at this stuff and a novice, but am experiencing the same thing w/my '02 Diesel Excursion 7.3 L. I just replaced my batteries after 5 years, checked the K&N Air Filter and still am experiencing this vibration or chugging sensation. I'm going to try Ford's Cetane Booster and inquire about a new Fuel Filter??? I'm not getting any warning lights on inside the truck either??? Good luck and let us know if you learn anything more.
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i replaced my batts also a month ago, watch the K&N filter a buddy of mine had one on his truck and the turbo fins actually wore off and Ford would not warranty it. I now carry a ford filter behind the seat just in case.oh exhaust is stock as is everything on the truck for the moment.
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ok just read something interesting. could a vacuum leak cause my problem? when i turn on heat ,air anything climate control it will only bolw out of the defrost hole (windshield area). i also have changed my hubs to Warn manual hubs. mine got FUBARed because of water in them. ive also chaged both front wheel bearing assemblies because of the same mud hole.
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