33:
226:
Although the IAC is supposed to last the vehicle's lifetime, various reasons may cause it to fail/malfunction prematurely. The most common failure mode is partial/complete jamming of the actuator (due to dirt/dust or even oil) where it cannot be smoothly controlled. The result is an engine that fails
212:
There is essentially no difference in efficiency between the technique of bypassing the throttle butterfly and operating the butterfly itself. The IAC allows the ECU to maintain minimum RPM irrespective of changes in engine load, sometimes referred to as
217:
feature. Thus the driver can more easily move the car from stand-still by merely releasing the clutch (manual transmission) or the brake (automatic transmission) without having to simultaneously press the accelerator.
197:
and hence the amount of air bypass is controlled digitally by the engine ECU. This allows the engine's idle speed to be maintained constant. The linear servo is most commonly a combination of a
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to maintain idle RPM and frequently stalls. A jammed actuator may be freed simply by cleaning it. However an actuator that has stopped working due to a fault in its
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that controls a plunger which varies air flow through the throttle body. The position of the
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Air leaks in either the stepper housing or pipes will cause elevated idle RPM.
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is an electrically controlled device, which gets its input from the vehicle's
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181:(ECU). The actuator is fitted such that it either bypasses the
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directly. The actuator consists of a linear servo actuator
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57:. Unsourced material may be challenged and removed.
254:Classroom Manual for Automotive Engine Performance
945:
304:
250:
290:
297:
283:
244:
117:Learn how and when to remove this message
363:Crankcase ventilation system (PCV valve)
149:vehicles to control the engine's idling
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161:vehicles a similar device known as an
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221:
55:adding citations to reliable sources
26:
257:. Cengage Learning. pp. 317–.
24:
25:
970:
31:
465:Overhead valve (pushrod) layout
145:) is a device commonly used in
42:needs additional citations for
168:
13:
1:
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7:
163:idle speed control actuator
66:"Idle air control actuator"
10:
975:
306:Internal combustion engine
923:
887:
847:
802:
774:Diesel particulate filter
759:
726:Idle air control actuator
708:
675:
667:Engine control unit (ECU)
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604:
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520:
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325:
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185:or operates the throttle
131:idle air control actuator
839:Viscous fan (fan clutch)
751:Throttle position sensor
460:Overhead camshaft layout
378:Core plug (freeze plug)
251:Douglas Vidler (2003).
231:will need replacement.
135:idle air control valve
18:Idle air control valve
619:Compression ignition
51:improve this article
769:Catalytic converter
179:engine control unit
895:Knocking / pinging
487:Combustion chamber
959:Engine technology
941:
940:
910:Stratified charge
677:Electrical system
659:Engine management
492:Compression ratio
432:Starter ring gear
331:rotating assembly
222:Problems with IAC
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119:
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16:(Redirected from
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784:Exhaust manifold
649:Spark plug wires
535:Boost controller
522:Forced induction
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151:rotational speed
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915:Top dead centre
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472:Tappet / lifter
455:Flathead layout
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207:optical encoder
187:butterfly valve
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954:Engine sensors
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353:Connecting rod
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205:and a digital
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709:Intake system
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700:Starter motor
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639:Ignition coil
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571:Petrol engine
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566:Diesel engine
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530:Blowoff valve
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447:Cylinder head
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338:Balance shaft
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264:0-7668-4864-7
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147:fuel-injected
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68: –
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63:
62:Find sources:
56:
52:
46:
45:
40:This article
38:
34:
29:
28:
19:
824:Electric fan
725:
624:Coil-on-plug
550:Turbocharger
545:Supercharger
417:Main bearing
407:Firing order
397:Displacement
343:Block heater
327:Engine block
315:Part of the
314:
253:
246:
233:
225:
211:
172:
162:
142:
139:IAC actuator
138:
134:
130:
128:
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94:
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80:
73:
61:
49:Please help
44:verification
41:
848:Lubrication
812:Air cooling
629:Distributor
581:Fuel filter
559:Fuel system
540:Intercooler
507:Timing belt
497:Head gasket
427:Piston ring
169:Description
159:carburetted
948:Categories
900:Power band
860:Oil filter
834:Thermostat
779:EGT sensor
741:MAF sensor
736:MAP sensor
721:Air filter
685:Alternator
644:Spark plug
576:Carburetor
502:Rocker arm
442:Valvetrain
373:Crankshaft
317:Automobile
238:References
229:servomotor
215:anti-stall
203:lead screw
195:servomotor
191:servomotor
77:newspapers
634:Glow plug
596:Fuel tank
591:Fuel pump
358:Crankcase
165:is used.
107:July 2018
933:Category
878:Dry sump
874:Wet sump
865:Oil pump
829:Radiator
746:Throttle
606:Ignition
477:Camshaft
402:Flywheel
383:Cylinder
368:Crankpin
199:DC motor
183:throttle
175:actuator
173:The IAC
905:Redline
789:Muffler
690:Battery
614:Magneto
91:scholar
928:Portal
716:Airbox
695:Dynamo
422:Piston
412:Stroke
391:layout
319:series
261:
157:). In
93:
86:
79:
72:
64:
888:Other
512:Valve
482:Chest
143:valve
98:JSTOR
84:books
870:Sump
387:bank
348:Bore
259:ISBN
70:news
855:Oil
444:and
329:and
155:RPM
133:or
129:An
53:by
950::
876:,
389:,
209:.
201:,
880:)
872:(
393:)
385:(
298:e
291:t
284:v
267:.
153:(
141:/
137:(
120:)
114:(
109:)
105:(
95:·
88:·
81:·
74:·
47:.
20:)
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