Tuesday, July 10, 2012

How to Speak Mechanic

Have you ever experienced a moment like this with your Mechanic?
Car trouble symptoms can indicate minor or major problems with your vehicle. This glossary of terms should help you identify what’s going wrong with your vehicle and assist you in letting your GM Certified Technician know exactly what’s been happening as well as helping you understand your mechanic in return. At the Perry Auto Group, we’d like to clear up a few questions:

Brake fadeStopping distance seems to increase, causing longer braking distance, similar to braking at high speeds
Low brake pedalBrake pedal must be pushed unusually far to engage brakes
Brake pedal pulsationBrake pedal fluctuates while brakes are applied
GrabsVehicle has a tendency to move right or left when brakes are applied; brakes engage suddenly when applying steady pressure to brake pedal
Cuts outTemporary complete loss of power. Engine quits at irregular intervals. May occur repeatedly or intermittently, usually under heavy acceleration.
DetonationMild to severe pings, usually worse under acceleration. Sounds like popcorn popping.
DieselingEngine runs after ignition switch is turned off. Runs unevenly and may make knocking noises.
HesitationMomentary lack of response as accelerator is pressed. Can occur at any speed. Usually most severe when starting from complete stop. May cause engine to stall.
MissPulsation or jerking that changes with engine speed. Exhaust has a steady spitting sound at idle or low speed. Not normally felt above 30 mph.
Rough idleEngine runs unevenly at idle. Car may also shake.
SluggishEngine delivers limited power under load or at high speed. Won’t accelerate as fast as normal. Loses speed going up hills. Vehicle has less speed than normal.
SpongyLittle or no increase in speed when accelerator is pushed down. Continuing to push pedal down will eventually give an increase in speed.
StallEngine stops running or dies out. May occur at idle or while driving.
SurgeVehicle speeds up and slows down with no change on accelerator pedal. Can occur at any speed.
Steering & HandlingDescription
BottomingSuspension moves to extreme end of travel and hits compression bumpers. Feels like a heavy thud.
Excessive playSteering wheel must be turned unusually far before vehicle responds.
Hard steeringVehicle difficult to steer, especially during parking situations or when first started.
PullsVehicle moves to one side when steering wheel is released.
ShimmyRapid side-to-side motion of both front wheels felt in steering wheel.
Sway/pitchingMushy or spongy ride; vehicle takes a long time to recover from bumps in the road.
VibrationVehicle shakes.
WandersVehicle meanders, requiring frequent steering adjustments to maintain direction.
Odors & StainsDescription
Antifreeze or coolant leakSweet odor, usually accompanied by steam from under the hood.
Axle leaksBlack stains with heavy, thick consistency.
Burning oilThick, heavy odor, sometimes accompanied by smoke from under the hood or from the exhaust
Coolant streaksYellow, green, pink, or orange stains that are lighter and thinner than oil.
Crankcase, oil, power-steering fluid leaksBrownish stains
Electrical shortAcrid odor, like burned toast
EmissionContigious, heavy sulfur odor like rotten eggs
Overheated brakes or clutchBurning rubber odor
OverheatingHot, metallic odor usually accompanied by antifreeze/coolant odor.
Transmission oil leaksReddish stains

For answers to all your service related questions feel free to contact us at Performance Chevrolet Service Department.

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