Engine vibrates or jerks while in motion

2006 MITSUBISHI MONTERO
93,000 MILES • 3.8L • V6 • 4WD • AUTOMATIC
Avatar
LINCOLN_JEO
  • MEMBER
  • 5 POSTS
Hello,

I noticed that this car occasionally vibrates and tends to off while in motion.

After replacing the plugs, servicing the injector nozzles as well as cleaning the fuel tank it stopped for a while as it were, but now it has started again though not as severe as it was before.

Right now the engine vibrates while steaming and the jerks occasionally while on motion.

Thanks
Jan 14, 2016 at 7:26 AM
Advertisement
Avatar
DOCHAGERTY
  • CERTIFIED EXPERT
  • 9,603 POSTS
Check that fuel pump and see if it meets pressure and deliver standards, and replace the main and fuel pump relays
Jan 14, 2016 at 8:51 AM
Avatar
LINCOLN_JEO
  • MEMBER
  • 5 POSTS
The mechanic has tested the fuel pump and confirmed it ok. Is there any other way of testing the fuel pump?
Thanks
Jan 15, 2016 at 5:00 AM
Advertisement
Avatar
HMAC300
  • CERTIFIED EXPERT
  • 48,601 POSTS
check for a vacuum leak and try cleaning throttle plate on both sides and iac hole with choke cleaner.
Jan 15, 2016 at 9:54 AM
Avatar
LINCOLN_JEO
  • MEMBER
  • 5 POSTS
Hello HMAC300,
How do you check for a vacuum leak. Where is the throttle plate and how do you clean it.
Thanks
Jan 16, 2016 at 2:47 AM
Avatar
HMAC300
  • CERTIFIED EXPERT
  • 48,601 POSTS
see video its' similar on yourcar

http://youtu.be/Z3LDHdS1upo
Jan 16, 2016 at 6:22 AM
Avatar
LINCOLN_JEO
  • MEMBER
  • 5 POSTS
Hi HMAC300,

Video quite informative. My mechanic have done that before; may we will repeat it again.

Thanks
Jan 16, 2016 at 7:41 AM