Vibrations

Tiny
B1N8R
  • MEMBER
  • 1997 FORD E-SERIES VAN
  • V8
  • 2WD
  • AUTOMATIC
  • 60,000 MILES
After 45mph my van vibrates,
If I go down on the gas pedal it will pick up and run fine until the gear in the tranny changes and then it will vibrate again (seems like under power its fine and when the 4th or high gear selects and the van starts to cruise then the vibrations starts.
Do you
have the same problem?
Yes
No
Wednesday, February 16th, 2011 AT 5:22 PM

19 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Symptoms indicates a drive train problem the the item most likely to cause such vibrations would be the propeller shaft center support bearing.

Have it checked for damage to the bearing support and excessive side movement. Have the shaft U-joints checked as well.
Was this
answer
helpful?
Yes
No
Wednesday, February 16th, 2011 AT 8:20 PM
Tiny
B1N8R
  • MEMBER
  • 13 POSTS
It has no center support bearing,
can anything else cause it.
Was this
answer
helpful?
Yes
No
Thursday, February 17th, 2011 AT 11:41 AM
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Whee is the vibration most felt?

Were the engine and transmission mounts checked?
Was this
answer
helpful?
Yes
No
Thursday, February 17th, 2011 AT 5:14 PM
Tiny
B1N8R
  • MEMBER
  • 13 POSTS
Yes they were checked and the tranny mount was changed
Was this
answer
helpful?
Yes
No
Saturday, February 19th, 2011 AT 2:27 AM
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Noise and vibrations are never easy to diagnose what more without the physical vehicle. You need to try to locate the source of the vibrations and go on from there.

Does the vibrations occurs when transmission is shifted to neutral?
Is it related to engine or road speed?
Was this
answer
helpful?
Yes
No
Saturday, February 19th, 2011 AT 2:52 PM
Tiny
B1N8R
  • MEMBER
  • 13 POSTS
I would say its road speed, when the van moves off and tranny changes to 45mph, the vibration starts, when you press the gas pedal the van picks up and after speed is reached and starts cruising it starts the vibration again.
Was this
answer
helpful?
Yes
No
Saturday, February 19th, 2011 AT 11:27 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
That can mean engine speed, road speed or drive train torsional load related and with limited information, I am sorry I don't think I can be of much assistance.
Was this
answer
helpful?
Yes
No
Sunday, February 20th, 2011 AT 12:30 PM
Tiny
B1N8R
  • MEMBER
  • 13 POSTS
What I observed is that when the van is cold it runs fine after it gets hot the vibration starts. Only after 45mph and over.
Was this
answer
helpful?
Yes
No
Sunday, February 20th, 2011 AT 7:54 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Is the Check Engine Light indicating?

The additional information indicates it could be from the engine, maybe a misfiring.
Was this
answer
helpful?
Yes
No
Monday, February 21st, 2011 AT 1:16 PM
Tiny
B1N8R
  • MEMBER
  • 13 POSTS
The check engine light does not come on, I took it to auto zone and they put the scanner on it read the #2 cylinder I change the spark plug and the coil and it still does the same. Should I change the injector.
Was this
answer
helpful?
Yes
No
Monday, February 21st, 2011 AT 5:17 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Try swapping the injector with another cylinder and see if problem migrates.

Have a compression test done to see if it is within specs.
Was this
answer
helpful?
Yes
No
Monday, February 21st, 2011 AT 5:27 PM
Tiny
B1N8R
  • MEMBER
  • 13 POSTS
The spark plug tip color is white does it means something
Was this
answer
helpful?
Yes
No
Monday, February 21st, 2011 AT 5:47 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
That is an indication of a lean running condition and could be the injector is not firing correctly. It could be an injector, its wiring, engine computer problem or cylinder compression fault.
Was this
answer
helpful?
Yes
No
Monday, February 21st, 2011 AT 6:02 PM
Tiny
B1N8R
  • MEMBER
  • 13 POSTS
I changed the injector, and its the same, only happens after reaching the operating tepm. And crosses 45mph.
Can a knock sensor cause this
Was this
answer
helpful?
Yes
No
Tuesday, February 22nd, 2011 AT 1:10 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
A faulty knock sensor would usually throw a code and can cause the problem. Is the Check Engine Light indicating and have you tried retrieving for trouble codes.

Have you checked the clinder compression? It coudl also be due to a faulty EGR system ( if equipped).
Was this
answer
helpful?
Yes
No
Tuesday, February 22nd, 2011 AT 1:31 PM
Tiny
B1N8R
  • MEMBER
  • 13 POSTS
The check engine light works but does not come on to indicate that there is a problem
Was this
answer
helpful?
Yes
No
Tuesday, February 22nd, 2011 AT 2:15 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Get the codes read again to see if the problem is still cylinder # 2?

You have not performed a compression test yet. It could be they key to an answer.
Was this
answer
helpful?
Yes
No
Tuesday, February 22nd, 2011 AT 2:28 PM
Tiny
B1N8R
  • MEMBER
  • 13 POSTS
I also observe that when driving 50mph or so and shift in N and press the gas the engine runs clean and smooth but when shift back to D the hesitation starts back. If that can help any
Was this
answer
helpful?
Yes
No
Wednesday, February 23rd, 2011 AT 12:26 AM
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
In N, there is no engine load so any minor misfiring would not be noticeable, especially at higher rpms.
Was this
answer
helpful?
Yes
No
Wednesday, February 23rd, 2011 AT 12:11 PM

Please login or register to post a reply.

Sponsored links