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Random shuddering at various speeds

Tiny
JIHADSHANAA
  • MEMBER
  • 2010 MITSUBISHI PAJERO
  • 3.8L
  • V6
  • 4WD
  • AUTOMATIC
  • 300,000 MILES
As I'm driving the vehicle vibrates and shudders. This can happen at any speed. The shuddering can increase if I switch the air conditioning on. It feels like it's coming from the front axle but that couldn't be confirmed. Many mechanics checked it but no one could figure out what is the problem. Your help is most appreciated.
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Sunday, February 9th, 2020 AT 3:34 PM

6 Replies

Tiny
JOETECHPRO
  • MECHANIC
  • 705 POSTS
Hey JIHADSHANAA,

Do you have the check engine light on?

If so there is a guide below to check for engine management fault codes:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

What have the previous mechanics reported as having tested so far?

Does the A/C always increase the shuddering? Is is just a vibration you are feeling or is there a noise also?

Regards, Joe
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Sunday, February 9th, 2020 AT 10:26 PM
Tiny
JIHADSHANAA
  • MEMBER
  • 4 POSTS
There is no check engine light. It appeared once a while back but it reset itself after engine restart. Mechanics have reported nothing conclusive. It varied from possible gearbox problems to airflow sensor or even throttle body assembly sensor but it was all reported as possible not certain.
Yes the A/C almost always increases the shuddering and no, there is no particular noise but shuddering ranging from mild to aggressive without any obvious change of driving conditions.
Again I thank your effort and attention.
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Monday, February 10th, 2020 AT 12:44 AM
Tiny
JIHADSHANAA
  • MEMBER
  • 4 POSTS
I forgot to mention that the shuddering is not continuous just comes and goes randomly and a release of the accelerator stops it momentarily.
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Monday, February 10th, 2020 AT 6:45 AM
Tiny
JOETECHPRO
  • MECHANIC
  • 705 POSTS
Hey JIHADSHANAA,

Do you have a note of the fault code that was stored when the check engine light came on?

Can you please check for engine management fault codes?

There is a guide in the link below.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Let us know what you have.

Regards, Joe
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Monday, February 10th, 2020 AT 7:59 AM
Tiny
JIHADSHANAA
  • MEMBER
  • 4 POSTS
I'm afraid that the signal has reset itself at engine restart before a code test was conducted so I don't have any fault code.
Any opinion on the matter would be appreciated as I'm at total desperation.

Regards
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Monday, February 10th, 2020 AT 11:03 AM
Tiny
JOETECHPRO
  • MECHANIC
  • 705 POSTS
Hey JIHADSHANAA,

Even if the light is no longer present the fault code that caused the light to come on will still stored in the memory as long as it was not deleted.

Have you rechecked the fault code memory?

This would be a great place to start, if you do have a fault code to start it makes diagnosis a lot easier.

It sounds like you may have a misfire or hesitation under load.

Regards, Joe
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Monday, February 10th, 2020 AT 9:37 PM

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