Erratic Idle?

Erratic idle noticed when engine idling.


Many clients come to our garage with problem of Erratic Idle:

This Erratic idle possibles are similar for car models listed below :-----
honda erratic idle

accord erratic idle
civic erratic idle
mustang erratic idle
bmw erratic idle
mercedes erratic idle
escort erratic idle

And many other car models too.

The possibilities to inspect ion this case is as follows :----



1 Inspect M.A.P. Sensor.
A Faulty M.A.P. Sensor can cause idle issues.

2 Inspect EGR Valve.
 Improperly Functioning or Faulty EGR Valve can cause erratic idle.

3 Inspect Fuel Injector .
Dirty or Worn Fuel Injectors can cause idle problems.

4 Inspect Idle Air Control Valve.
 Damaged, Loose, or Faulty Idle Air Control Valve can cause idle issues.

5 Inspect Idle Speed Actuator.
 Damaged, Loose, or Faulty Idle Speed Actuator has to be checked.

6 Inspect Throttle Position Sensor.
 Faulty or Incorrectly Connected Throttle Position Sensor is one possibility for erratic idle.

7 Inspect Fuel Filter.
A Clogged or Dirty Fuel Filter causes erratic idle.

8 Inspect PCV Valve.
If PVC valve is  Plugged or Damaged erratic idle will be noticed.

9 Inspect Carburetor on vehicle model with carb.
A Worn, Faulty or Damaged Carburetor can also cause erratic idle.

10 Inspect Valve.
A  Burned, Worn, or Sticking Exhaust Valves are causes of major erratic idle.

12 Inspect Timing Set.
 Slipped Timing Chain or Worn TimingGear(s) are issues of Erratic idle.

13 Inspect Fuel Pump.
A  Faulty Fuel Pump can cause erratic idle.

14 Inspect Camshaft.
Erratic idle due to  Camshaft Lobes Worn.

15 Inspect Ignition Point Set.
If  Burned, Worn or Incorrectly Set Ignition Points.The idle problems will be noticed.

This details will help.
Thanks.

See below latest idle related solved problems :----

Bad miss at idle?

http://technoanswers.blogspot.com/2012/01/bad-miss-at-idle.html

Engine stumbles coming off idle when warm?

http://repairhelpcenter.blogspot.com/2012/01/engine-stumbles-coming-off-idle-when.html

Erratic idle on car?

http://schematicsdiagram.blogspot.com/2011/12/erratic-idle-on-car.html

Low idle when cold out side?

http://repairhelpcenter.blogspot.com/2011/12/low-idle-when-cold-out-side.html

GMC Idle Air Control (IAC) Valve Replacing?

http://schematicsdiagram.blogspot.com/2011/12/gmc-idle-air-control-iac-valve.html

1996 Camry intermittent engine failure while idle?

http://repairhelpcenter.blogspot.com/2011/10/1996-camry-intermittent-engine-failure.html

Engine quits at idle?

http://repairhelpcenter.blogspot.com/2011/10/engine-quits-at-idle.html

Car overheats and Air blows hot at idle?

http://howtobyme.blogspot.com/2011/11/car-overheats-and-air-blows-hot-at-idle.html

Engine overheated then car will not start?

http://schematicsdiagram.blogspot.in/2012/02/engine-overheated-then-car-will-not.html

No heat, blower blows only cold?

http://technoanswers.blogspot.in/2012/02/no-heatblower-blows-only-cold.html

Cylinder 6 Misfire?

http://howtobyme.blogspot.com/2011/12/cylinder-6-misfire.html

While stop engine idles like cylinder missing?

http://schematicsdiagram.blogspot.com/2012/01/while-stop-engine-idles-like-cylinder.html

Idle flair is noticed on car? Rough idle? car will not idle? Erratic idle speed?

http://technoanswers.blogspot.in/2012/02/idle-flair-is-noticed-on-car-rough-idle.html

High rpm in neutral? Inconsistant high RPM in neutral?

http://technoanswers.blogspot.in/2012/02/high-rpm-in-neutral-inconsistant-high.html

Testing mass air flow sensor?

Car not starting properly ,car has slow accelarations,car bogs down,low gas mileage, shuddering, stalling, knocking or pinging,low rpm,car sputtering etc etc are basically indication of bad MAF sensor.MAF is mechanic short hand for a Mass Air Flow sensor. It measures the amount of air entering the engine. It is located between the air cleaner box and the throttle body. It usually is either clamped into the rubber tube which connects these parts or bolted to the air cleaner top housing. It will have an electrical connector attached to it. To do proper testing requires a professional computer scan tool.
Two "poor man" tests can be done. First test is to tap lightly on the MAF while the engine is idling [engine must be warmed up aka at operating temperature] If the engine stumbles or the idle changes when the MAF is tapped on, it is bad. Another check is to shut the engine off [key off] and disconnect the wiring connector to the MAF. This will cause the engine computer to go into "limp home" mode. This is the computer's response to a failed major sensor. If the engine now runs better, the MAF is probably bad. FYI, the MAF can fail in a number of ways which will not give a fault code. Often, the best test is to substitute a MAF from another car [same year, make, model & engine] that is running normally.

This details will help.Thanks.

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If you need dis-assembly or replacement instructions for any other auto/car part, or you want to ask question related to your car/truck jeep problem then please leave the comment with your details, so I can provide you the required instructions and solutions.

For more car help solutions,see the solved answers list below:------------

Where is MAF sensor located on 2000 Ford Expedition?

http://schematicsdiagram.blogspot.com/2011/12/where-is-maf-sensor-located-on-2000.html

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http://schematicsdiagram.blogspot.com/2011/12/car-turns-overbut-only-startsif-starter.html

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http://schematicsdiagram.blogspot.com/2011/12/service-engine-soon-light-stays-on.html

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http://schematicsdiagram.blogspot.com/2011/12/gasoline-around-gas-cap.html

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http://schematicsdiagram.blogspot.com/2011/12/car-will-not-go-into-4wd-high-or-4wd.html

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http://schematicsdiagram.blogspot.com/2011/12/truck-is-hard-to-start-and-emits-smoke.html

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http://schematicsdiagram.blogspot.com/2011/12/engine-cuts-out-at-3000-rpm.html

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http://schematicsdiagram.blogspot.com/2011/12/car-turns-over-but-will-not-startonly.html

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http://schematicsdiagram.blogspot.com/2011/12/catalytic-converter-glowing-hot.html

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http://schematicsdiagram.blogspot.com/2011/12/after-getting-car-washedcheck-engine.html

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http://schematicsdiagram.blogspot.com/2011/12/fuel-gauge-jumps-from-empty-to-full.html

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http://schematicsdiagram.blogspot.com/2011/12/why-airbag-light-flashes-7-times.html

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http://howtobyme.blogspot.com/2011/12/car-crankshas-spark-but-will-not-start.html

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http://howtobyme.blogspot.com/2011/12/cylinder-6-misfire.html

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http://schematicsdiagram.blogspot.com/2011/12/2008-ford-ranger-shifter-knob-removal.html

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http://schematicsdiagram.blogspot.com/2011/12/erratic-idle-on-car.html

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http://schematicsdiagram.blogspot.com/2011/12/car-dies-when-gas-pedal-is-pressed.html

MAF, IAT, MAP and Coolant Level Sensor problem all together on Mazda MPV?

http://schematicsdiagram.blogspot.com/2011/12/maf-iat-map-and-coolant-level-sensor.html

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http://schematicsdiagram.blogspot.com/2011/12/car-surging.html

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http://schematicsdiagram.blogspot.com/2011/12/how-to-replace-distributor-on-chevrolet.html

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http://schematicsdiagram.blogspot.com/2011/12/cadillac-seville-digital-dash-display.html

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http://schematicsdiagram.blogspot.com/2011/12/can-car-radio-code-block-passkey-anti.html

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http://schematicsdiagram.blogspot.com/2011/12/rear-oil-seal-leaking.html

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http://schematicsdiagram.blogspot.com/2011/12/car-water-leak-around-starter-area-and.html

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