Quantcast
Jump to content


New Massimo Buck 450

Bobb

By Bobb
in Massimo UTV SxS Forum

 Share

Recommended Posts

Bobb Newbie

Bobb

Posted
Posted

Just bought gently used (16 miles) Massimo Buck 450 and I'm having the idle won't run when you step on the gas issue???   WTF??  Is it in fact the exhaust sensor??

TapBoss Collaborator

TapBoss

Posted
Posted

From my manual:

INCORRECT ENGINE IDLING SPEED

Engine 1. Cylinder and cylinder head • Incorrect valve clearance • Damaged valve train components

2 Air filter • Clogged air filter element

Fuel system 1. Throttle body • Damaged a loose throttle body joint • Improper throttle cable free play • Flooded throttle body • Faulty air induction system Electrical system

1. Battery • Discharged battery

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
 Share
Go to topic listing

  • Similar Topics

    • ToughLuck
      2021 Massimo MXU 1000 Runs Rich
      By ToughLuck
      I have a 2021 Massimo MXU 1000.  Last winter the front drive shaft sheared off inside the motor and it was cheaper to buy a new motor than to take it apart in order to remove the front drive shaft that was broken inside the case…
      Now it is running rich, seems to maybe be geared too high, does not accelerate well once you hit about 28mph.  I’ve replaced the O2 sensor.  MAF is next (I accidentally ordered the wrong one, but when I removed the old one you can clearly smell fuel).  
       I’m not a motorhead but I can turn a wrench.  Any ideas how to get this motor optimized?  The motor has about 300 miles on it.  I broke it in as recommended in the manual. 
    • Homeowner A
      Black O2 Sensor?
      By Homeowner A
      I've been having misfire issues with my UTV 400 when it gets warm and I've thrown all kinds of parts at it so far with no permanent resolution.  Today I removed the O2 sensor and it is black on the end.  To me that means it's running rich and/or the sensor isn't working.  I replaced the sensor with a new one and will see how it goes I guess.  With EFI, I'm wondering why the sensor would be this way with low hours and mileage?  Is there a way to adjust or lean out fueling on these?  Thanks in advance.  
    • Joe Breaux
      2017 Massimo MSU500 Thermostat Malfunction
      By Joe Breaux
      Got a 2017 Massimo MSU500 UTV with thermostat malfunction.. hot light comes on in 4-5 minutes but radiator is ice cold... where exactly is it?  The hose neck on the head has nothing in it.  I was told it was down by oil drain plug.. only thing I see is water pump.. Is in inside pump housing?  Cant find any exploded diagrams that show it.. how to I remove it? any help would be appreciated
    • SteveS
      2021 Massimo MSU 800 will not run above 20 MPH
      By SteveS
      While driving the MSU 800, it runs good but it lately it will not go over 20 MPH. The side by side will hesitate when it reaches 21 MPH, but it will run good under 20 MPH. What is the issue?
    • Adrian Domingues
      2023 Massimo T-Boss 550
      By Adrian Domingues
      I have 31 miles on my new T-Boss 550. In order to start I put in nentural and the emerage brake on and push down on brake paddle, then trun ket and get nothing, with key still on I shift to reverase and the back to netural and it starts.  Anyone know what is happening.
      Thanks for your help

UTV FORUMS

MORE SECTIONS

FOLLOW US ON

GET IN TOUCH

  • Automotive Webmaster
×
×
  • Create New...