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Smart Reasoning:

C&E

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Qaagi - Book of Why

Causes

Effects

autolite plugs(passive) caused byspark plug issues

Some worry about the resistor plugs + resistor spark plug leadscausingspark plug firing problems

HTleadsspark plugs , misfire detection P1183

Lead depositscausesparkplug misfire

Plug A failing spark plugcan causea misfire in your spark plugs

Erosion at these points creates a larger gap between the center and ground electrodescausingplug misfire

A bad fuel injectorcan causespark plug issues

buildup on fuel injectorsis causingspark plug to misfire

less air and more fuelcan causespark plug issues

This excess fuel ... fuel bridging or fuel clampingmay causemisfiring of the spark plug 12

decreasing the amount of fuel in the ratiocausingthe spark plugs to misfire

a different fuel formulation than they were used to(passive) caused byspark plug issues

Engine knock , increased carbon deposits , and increased fuel consumptionmay also causespark plug problems

other problems such as fuel or exhaust system troublescan triggerspark plug problems

accumulation of manganese oxide engine deposits that result from the combustion of an aviation fuel composition comprising manganese(passive) caused byspark plug misfire

The harness and its terminal wells ... generally dirty conditionresultedin spark plugs erratically misfiring

accumulation of manganese oxide engine deposits that result from the combustion of an aviation fuel composition in a spark - ignited aviation engine comprising manganese(passive) caused byspark plug misfire

an abnormal air - fuel blend that ca n’t be filtered properly due to your old air filter(passive) can be caused byspark plug problems

Coil packs do failcausinga sparkplug to misfire

High resistance in the plug wirescan leadto misfiring spark plugs

Finding outwas causingmy spark plugs to misfire

High resistance in a plug wirecan causemisfiring spark plugs

The coil packs were messed upcausingthe spark plugs to misfire

Carbon trackingcausesspark plug misfires

If it is , a wire could be sparking in the engine compartmentcausingits connected spark plug to misfire

oil leakscan causespark plugs to misfire

Turns out that one of the ignition wires would generate static charge after heating up ( after driving awhilecausedone of the spark plugs to misfire

that the there was a crack in the ignition coilcausingmisfire of the spark plugs

where the ignition system ca n’t generate enough juice to jump the gapcausingplugs to misfire

the cylinderscausingthe sparkplugs to misfire

Gunky orcould ... preventmisfiring spark plugs

it was leaking a lot of petrolcausingthe sparkplugs to misfire

a bad cat converter(passive) caused bymisfire spark plug

Electrode wearcan also causeplugs to misfire

because the old intake leakedcausingspark plugs to misfire /

small amounts of coolant ... of course as you go oncausesthe spark plugs to misfire

a bad plug wirewill causea spark plug to misfire

bad spark or engine floodingcausingspark plugs to misfire

oil ... the coil pack bootscausespark plug misfires

Bad oneswill causespark plug misfiring

your car ’s check engine light to come onwould causeyour car ’s check engine light to come on

the check engine light a year earlierhad triggeredthe check engine light a year earlier

unburnt fuel triggering a check engine lightcan causeunburnt fuel triggering a check engine light

unburnt fuel which triggers a check engine lightcan causeunburnt fuel which triggers a check engine light

the check engine light to come on , make sure you know how far you can drive with the check engine light oncan also causethe check engine light to come on , make sure you know how far you can drive with the check engine light on

alsocan ... createalso

a lag that feels jerky and can kill an idling enginecausea lag that feels jerky and can kill an idling engine

a performance problem(passive) caused bya performance problem

damage to the catalytic converter , as well as reducing fuel economy and engine powercan causedamage to the catalytic converter , as well as reducing fuel economy and engine power

in the vehicle stallingresultingin the vehicle stalling

a code and the lightwould seta code and the light

in significant fuel wastagecan resultin significant fuel wastage

un - burned fuel(passive) caused byun - burned fuel

engine stalling while idlingcan causeengine stalling while idling

misfires like a bad coilcan causemisfires like a bad coil

detrimental damage to many important parts of your enginecan causedetrimental damage to many important parts of your engine

in a massive drop in fuel efficiencycould resultin a massive drop in fuel efficiency

your engine to consume more fuel than usualmight causeyour engine to consume more fuel than usual

in too much fuel entering your exhaust systemcan resultin too much fuel entering your exhaust system

to significant fuel waste as the miles add upcan leadto significant fuel waste as the miles add up

fuel to pass through the exhaust system unburnedcausingfuel to pass through the exhaust system unburned

the air - fuel mixture to burn irregularly , leading tocausethe air - fuel mixture to burn irregularly , leading to

to decreased engine efficiency and high fuel consumptionwill leadto decreased engine efficiency and high fuel consumption

the engine to misfire , decreasing fuel efficiency overallmay causethe engine to misfire , decreasing fuel efficiency overall

issues like stalling and inability to start the vehiclecausingissues like stalling and inability to start the vehicle

in decreased performance , rough idle or even stallingresultsin decreased performance , rough idle or even stalling

your car 's fuel economy to decrease by 30 percentcan causeyour car 's fuel economy to decrease by 30 percent

an O2 to read lean and not rich because the sensor does n't sniff fuel , but oxygenwould causean O2 to read lean and not rich because the sensor does n't sniff fuel , but oxygen

rough idling , poor gas mileage ... replacing all Spark plugs cleared problemcausedrough idling , poor gas mileage ... replacing all Spark plugs cleared problem

an O2 to read lean and not rich ... since the sensor does n’t sniff fuel , but oxygenwould causean O2 to read lean and not rich ... since the sensor does n’t sniff fuel , but oxygen

an unburned fuel air mixture to pass through the catalyst , which could cause higher than normal catalyst temperaturesmay causean unburned fuel air mixture to pass through the catalyst , which could cause higher than normal catalyst temperatures

These noises(passive) are caused byThese noises

incomplete combustion , which is potentially costing you hundreds of dollars in wasted gascauseincomplete combustion , which is potentially costing you hundreds of dollars in wasted gas

your car to jolt during accelerationcan causeyour car to jolt during acceleration

a jolt when you acceleratecan causea jolt when you accelerate

Backfiring(passive) is caused byBackfiring

you feel(passive) are most likely caused byyou feel

over timecan resultover time

the same emissions - related issues that cause corrosive gasescan causethe same emissions - related issues that cause corrosive gases

to drivability problemscan contributeto drivability problems

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Smart Reasoning:

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