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Qaagi - Book of Why

Causes

Effects

A hole or leak in the exhaust systemcan causeexhaust back - pressure problems

Small turbocauseshigh exhaust pressure

other applicationscausinghigh exhaust pressure

the particulate filter is sufficiently blockedto causeexhaust back pressure to become excessive

Turbos or other applicationscausinghigh exhaust pressure

by high pressure protection , etc(passive) caused byexcessive exhaust pressure

too highcausestoo much exhaust back pressure

waves , which leads to undesirable surging of engine speed and temperature when a conventional speed governor approach is used to schedule the engine inputs(passive) caused byexhaust manifold pressure disturbances

the turbocausestoo much back pressure in the exhaust

The only timecausesexcess exhaust pressure

the exhaust pipingwould causehigh exhaust back pressure

the new petrol particulate filter(passive) caused bythe increased exhaust back pressure

a restrictioncausesexhaust back pressure to back up

a clogged converter(passive) is usually caused byExhaust back pressure formation

pipingcausinghigh exhaust back - pressure

by the added fuel(passive) caused byhigher exhaust back pressure

Partscausinghigh exhaust back pressure

by the wild valve timing(passive) caused bythe low exhaust back pressure

the wild valve timing(passive) caused bythe low exhaust back pressure

systemscausingexcessive exhaust back pressure

a blocked CATcausingexcessive exhaust back pressure

This flow restrictioncausespressure on the exhaust system

Should adjust the adjusting ring position ; discharge piping resistance too largecausingexcessive exhaust back pressure

our turbo sizesleadsto excessive exhaust back pressure

Certain engine faults , such as poor engine running condition , andcan ... causeexhaust blockages

Particles contained within gasesmay also causeexhaust blockages

by restriction of gas flow(passive) caused byPressure in exhaust system

restriction of gas flow(passive) caused byPressure in exhaust system

the exhaust system , which shall be minimized e.g. by using advanced substrates with higher porosity and thinner walls(passive) caused bythe exhaust back pressure increase

The restricted catalyst elementwill causeexcessive exhaust back - pressure

a Dinandesignedexhaust system to reduce back pressure

A clogged catalytic convertercan leadto exhaust back pressure buildup

by restriction in the silencers(passive) caused byexhaust pressure

somethingcausingexcess exhaust back pressure

your carcausinga reducing of exhaust back pressure

by the filter(passive) caused byexhaust pressure loss

turbo - Clogged catcausingexhaust backpressure

such a waycauseback pressure to the exhaust system

by the turbocharger(passive) caused byexhaust backpressure

blocking the exhaustcausingsome back pressure / exhaust

premature opening(passive) caused bypremature opening

exhaust gasses to remain in each cylinder after the exhaust strokecausesexhaust gasses to remain in each cylinder after the exhaust stroke

pre - mature opening(passive) caused bypre - mature opening

lack of power and overheatingwill causelack of power and overheating

this problemto causethis problem

reversionwill causereversion

the sensor to read incorrectlycan causethe sensor to read incorrectly

from the exhaust pulseresultingfrom the exhaust pulse

in engineresultedin engine

in a decrease in vehicle power and increased fuel consumptionresultsin a decrease in vehicle power and increased fuel consumption

in an increase inwill resultin an increase in

in enhanced engine performance at high engine speedsresultsin enhanced engine performance at high engine speeds

loss of torque off the linewill causeloss of torque off the line

What problems(passive) might be caused byWhat problems

your engine not to run wellcausingyour engine not to run well

directlywill ... resultdirectly

typicallyresultstypically

the problemscausingthe problems

to poor operation of the engineleadsto poor operation of the engine

engine damagecan causeengine damage

pressure in your tank and fuel flowcausingpressure in your tank and fuel flow

a lose of powerwill causea lose of power

higher fuel consumptioncauseshigher fuel consumption

delayed turbocharger responsecan causedelayed turbocharger response

to higher pumping loss in the enginesleadsto higher pumping loss in the engines

value Pressure maintaining valveto setvalue Pressure maintaining valve

in increased low R.P.M. powerresultingin increased low R.P.M. power

a leak in your egr cooler ... if you have onewas causinga leak in your egr cooler ... if you have one

problemscausingproblems

high EGT 's and hence failurecausinghigh EGT 's and hence failure

to increased fuel consumption and a loss of powerleadsto increased fuel consumption and a loss of power

to poor operation of the motorleadsto poor operation of the motor

the soundcould causethe sound

in low R.P.M. powerresultingin low R.P.M. power

this problemwas causingthis problem

the hole in the pistoncausedthe hole in the piston

valve floatmight causevalve float

The mufflers ( each over five gallons in volume(passive) are designedThe mufflers ( each over five gallons in volume

the pressure in the exhaust system being higher than a vacuum(passive) caused bythe pressure in the exhaust system being higher than a vacuum

the oil in the reservoircausedthe oil in the reservoir

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