Why is my temp guage moving from near Hot to normal so rapidly?
My 2009 Infiniti M35x temp guage is quickly moving around between normal and 249 degrees.( Im reading it with my computer) same whether sitting still or driving.

The Infiniti M35 sedan receives a boost in power for 2009, in the form of a new V6 engine, and a new seven-speed automatic transmission. Power comes in the form of a new 3.5-liter V6, which produces 303 hp, a bump of 28 hp over the previous year's engine. However, torque drops off slightly, from 268 to 262 lb-ft, although few drivers will notice the difference. On the positive side, fuel economy improves slightly from 16/22 city/highway mph to 17/25 (for the Base trim only).
In the Base M35 trim, the V6 engine links to a new seven-speed automatic transmission with a Drive Sport (DS) mode and a driver-adaptive algorithm, which senses the driver's style and makes adjustments to shifting patterns accordingly. The M35x trim with all-wheel drive, however, retains its electronically controlled five-speed automatic, which also features a Drive Sport mode and driver-adaptive algorithm.
In an effort to keep pace with competitors such as the Mercedes-Benz E-Class and the BMW 5-Series, the luxury-oriented, rear-wheel-drive M35 sedan comes equipped with such key features as leather seats, 10-way power-adjustable and climate-controlled front seats, a power moonroof, a leather-wrapped steering wheel, African rosewood interior trim, and a six-speaker audio system with a 6-CD changer.
Owners can also opt for a Sport Package on the Base M35 sedan, which adds a sport-tuned suspension, rear active steering, and 19-inch alloy wheels, among other features. Other options include a Lane Departure Prevention System, which warns drivers when they start to drift out of their lane, and an optional rear-view monitor, which helps ensure safety when backing up.
The M35's combination of luxury and performance seems to be doing something right, as owners have very few negative comments about the sedan. Handling and acceleration get high marks, as does the roomy interior and spacious 15-cubic-foot trunk. The highest compliments go to the optional navigation system, but the M35 receives low marks for its rough ride with the Sport suspension and small trunk opening.
My 2009 Infiniti M35x temp guage is quickly moving around between normal and 249 degrees.( Im reading it with my computer) same whether sitting still or driving.
Can you replace the tires with different sizes and if you do does that create any issues?
I have a 2009 m35 that has been overheating. Needle goes from middle and quickly rises to the top. There is a small crack at the to of the radiator. I'm going to purchase a new radiator but would like to know what may have caused it so I can fix that too. Has anyone else experienced this?
I was recently at a garage and they said that since there is wiggle in the knuckle of the ball joint just inside the front tires of the lower control arm, they both need to be replaced. Immediately. I'm trying to get more opinions on this before I invest another $1300-$1500 in my car. Thanks to anyone who can help!
Air Conditioning
Automatic climate control front air conditioning · Dual front air conditioning zones · Rear air conditioning: with independent controls
Airbags
Dual front airbags · Passenger airbag deactivation: occupant sensing deactivation · Front side airbags · Front side curtain airbags
Audio System
Antenna Type: element · IPod auxiliary audio input · Hard Drive: 9.3GB · Wireless headphones · Single disc in-Dash CD · MP3 player: CD MP3 Playback · Premium Brand: Bose · AM/FM radio · Rear audio: rear volume control · XM-ready satellite radio · Surround audio: 5.1 · Total Number of Speakers: 14 · 160 watts
Brakes
ABS: 4-wheel · Front brake diameter: 12.6 · Front brake width: 1.1 · Front brakes: ventilated disc · Rear brake diameter: 12.1 · Rear brake width: 0.6 · Rear brakes: ventilated disc
Comfort Features
Armrests: rear center folding with storage · Center console trim: wood · Dash trim: wood · Door sill trim: illuminated scuff plate · Door trim: wood · Floor Mat Material: carpet · Floor Material: carpet · Floor Mats: front · Foot pedal trim: aluminum · Shift knob trim: leather · Steering wheel trim: leather
Convenience Features
Center console: front console with armrest and storage · Cupholders: rear · Dimming rearview mirror: auto-dimming · Easy entry: power driver seat · Memorized settings: side mirrors · Multi-function remote: proximity entry system · One-touch windows: 2 · Power outlet(s): 12V front · Power steering: speed-proportional · Power windows: lockout button · Reading lights: rear · Steering wheel: power tilt and telescopic · Steering wheel mounted controls: cruise controls · Storage: sunglasses holder · Sunshade: power rear window · Universal garage door opener: Homelink · Vanity mirrors: dual illuminating
Driver Seat
Adjustable lumbar support: power · Power adjustments: 10
Engine
Alternator: 150 amps
Exterior Features
Door handle color: body-color with chrome accents · Exhaust: quad exhaust tips · Exhaust tip color: chrome · Front bumper color: body-color · Grille color: chrome · Mirror color: body-color · Rear bumper color: body-color · Rear trunk/liftgate: power operated
Headrests
Front headrests: adjustable · Number of front headrests: 2 · Number of rear headrests: 3
In Car Entertainment
Video monitor location: rear · Video monitor size: 8 · Video system: DVD player
Instrumentation
Warnings and reminders: maintenance reminder
Lights
Headlights: HID · Tail and brake lights: LED
Mirrors
Exterior mirrors: power
Passenger Seat
Adjustable lumbar support: power · Power adjustments: 10
Rear Seats
Type: bench
Roof
Moonroof: sliding sunshade
Safety
Active head restraints: driver · Child seat anchors: LATCH system · Crumple zones: front
Seatbelts
Emergency locking retractors: driver · Rear center seatbelt: 3-point · Seatbelt force limiters: front · Seatbelt pretensioners: front
Seats
Driver seat power adjustments: height · Front seat type: sport · Heated: front seats · Passenger seat power adjustments: height · Rear headrests: adjustable · Upholstery: leather-trimmed
Spare Tire
Mount Location: inside · Size: temporary
Steering
Steering ratio: 16.4 · Turns lock-to-lock: 3.0
Suspension
Front Shock Type: gas shock absorbers · Front Spring Type: coil springs · Front Suspension Classification: independent · Front Suspension Type: double wishbones · Rear Shock Type: coil over shock · Rear Spring Type: coil springs · Rear Suspension Classification: independent · Rear Suspension Type: multi-link · Stabilizer bar(s): front
Telematics
Navigation system: touch screen display · Phone: hands free · Phone wireless data link: Bluetooth
Tires
Type: performance
Tires and Rims
Wheel type: aluminum alloy · Wheels: aluminum
Wheels
Wheel spokes: 5
Windows
Front wipers: rain sensing · Power windows: with safety reverse
Air Conditioning
Automatic climate control front air conditioning · Dual front air conditioning zones · Rear air conditioning: with independent controls
Airbags
Dual front airbags · Passenger airbag deactivation: occupant sensing deactivation · Front side airbags · Rear side curtain airbags
Audio System
Antenna Type: element · Auxiliary audio input: jack · Hard Drive: 9.3GB · Wireless headphones · 6 disc in-dash CD · MP3 player: CD MP3 Playback · Premium Brand: Bose · AM/FM radio · Rear audio: rear volume control · XM-ready satellite radio · Surround audio: 5.1 · Total Number of Speakers: 6 · 160 watts
Brakes
ABS: 4-wheel · Front brake diameter: 12.6 · Front brake width: 1.1 · Front brakes: ventilated disc · Rear brake diameter: 12.1 · Rear brake width: 0.6 · Rear brakes: ventilated disc
Comfort Features
Armrests: rear center folding with storage · Door sill trim: stainless steel · Floor Mat Material: carpet · Floor Material: carpet · Floor Mats: front · Shift knob trim: leather · Steering wheel trim: leather
Convenience Features
Center console: front console with armrest and storage · Cupholders: rear · Dimming rearview mirror: auto-dimming · Easy entry: power driver seat · Memorized settings: steering wheel · Multi-function remote: proximity entry system · One-touch windows: 2 · Power outlet(s): 12V front · Power steering: speed-proportional · Power windows: lockout button · Reading lights: rear · Steering wheel: power tilt and telescopic · Steering wheel mounted controls: phone · Storage: front seatback · Sunshade: power rear window · Universal garage door opener: Homelink · Vanity mirrors: dual illuminating
Driver Seat
Adjustable lumbar support: power · Power adjustments: 10
Drivetrain
4WD Type: on demand
Engine
Alternator: 150 amps
Exterior Features
Door handle color: body-color with chrome accents · Exhaust: quad exhaust tips · Exhaust tip color: chrome · Front bumper color: body-color · Grille color: chrome · Mirror color: body-color · Rear bumper color: body-color · Rear trunk/liftgate: power operated
Headrests
Front headrests: adjustable · Number of front headrests: 2 · Number of rear headrests: 3
In Car Entertainment
Video monitor location: rear · Video monitor size: 8 · Video system: DVD player
Instrumentation
Warnings and reminders: maintenance reminder
Lights
Headlights: Auto on/off · Tail and brake lights: LED
Mirrors
Exterior mirrors: reverse gear tilt
Passenger Seat
Adjustable lumbar support: power · Power adjustments: 10
Rear Seats
Type: bench
Roof
Moonroof: power glass
Safety
Active head restraints: driver · Child seat anchors: LATCH system · Crumple zones: front
Seatbelts
Emergency locking retractors: driver · Rear center seatbelt: 3-point · Seatbelt force limiters: front · Seatbelt pretensioners: front
Seats
Driver seat power adjustments: reclining · Front seat type: bucket · Heated: front seats · Passenger seat power adjustments: reclining · Rear headrests: adjustable · Upholstery: leather-trimmed
Spare Tire
Mount Location: inside · Size: temporary
Steering
Steering ratio: 16.1 · Turns lock-to-lock: 3.0
Suspension
Front Shock Type: gas shock absorbers · Front Spring Type: coil springs · Front Suspension Classification: independent · Front Suspension Type: double wishbones · Rear Shock Type: gas shock absorbers · Rear Spring Type: coil springs · Rear Suspension Classification: independent · Rear Suspension Type: multi-link · Stabilizer bar(s): front
Telematics
Navigation system: hard drive navigation system w/voice activation · Phone: hands free · Phone wireless data link: Bluetooth
Tires
Type: performance
Tires and Rims
Wheel type: aluminum alloy
Wheels
Wheel spokes: 5
Windows
Front wipers: rain sensing · Power windows: with safety reverse