Driveability Symptoms Versus Fuel Quality Diagnosis

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Driveability Symptom

Fuel Quality – Cause

Excessive spark knock

Octane number too low

Hard cold starts

Volatility too low

Contamination

Garage stalls and/or tip-in hesitation

Volatility too low

Contamination

Intake valve deposits (Note 1)

Low fuel level

Poor cold pe...

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Document Tags

Document Title: Driveability Symptoms Versus Fuel Quality Diagnosis

driveability

fuel

quality

excessive

spark

octane

cold

volatility

contamination

stalls

intake

valve

deposits

level

performance

lack

detergent

additives

brand

gasoline

problem

diagnostic

vehicle

pressure

control

check

system

engine

premium

grade

different

than

following

exhaust

lowers

vapor

contains

percent

oxygen

oxygenated

monoxide

carbon

common

ether

mtbe

ethanol

increase

methanol

numbers

water

emission

prevent

metal

corrosion

antiknock

agents

hydrocarbon

throttle

anti

odors

test

analyzer

hose

fuel system

carbon monoxide

valve deposits note

poor cold performance

lack power sluggish

rough unstable idle

unstable idle intake

different brand fuel

carbon monoxide emissions

methyl tertiary butyl

tertiary butyl ether

butyl ether mtbe

present laws permit

boosts gasoline octane

deposit control agents

anti icing agents

fuel system running

long term fuel

term fuel trim

fuel trim than

test indicates excessive

evap vapor canister