Question about 1991 Honda Accord

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Idling not idling at idle speed engine dies when gears selected (auto)

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Low / uneven idle problem can cause by a lot of components.

Dirty air filter

Dirty injectors + o-rings

Vacuum leak at intake manifold and vacuum hose.

Bad Idle Air Control Motor (IAC)

Low compression (170 psi + is OK)

Start cleaning and repair these trouble spots and see is there any improvement.

====

For more advance DIY'er then you may try this.

Use a can of Berryman carburetor clean to locate the vacuum leak.


SEE SAMPLE PICTURE HERE


This is a 20-30 minutes job.

Vacuum leaks can occur in following locations.


Intake manifold AND/OR vacuum lines.


Intake manifold is not accessible unless the engine head if off.

You can still check the potential leak by spraying some Berryman near the intake manifold.

Listen for rpm increase after you introduce the Berryman (FUEL) at idle.


Do the same starting from the brake booster unit (the round unit) on the drive side fire all.

Carefully listen for increase of RPM right after to spray the Berryman to the potential vacuum spot.

Get a friend to HEAR the ROM increase or monitor for RPM on the tech.

DO NOT AIM the Berryman into any heat source.


PLEASE RATE my answer if it is useful to you.

Posted on Dec 14, 2009

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The mechanic should check the Idle .If the Idle is stock then repair then or adjust the Idle .When It does not Idle, It means that the Idle is been stuck or its been tight or the Idle screw or bolt is been tight that causes the Idle not to move .You should loosen the Idle a little until you could arrange the Idle until it will Idle normally .When its not Idle when selecting gear. You should adjust the Idle until the car engine will not stop. and that the car can run while selecting gear.

Posted on Sep 05, 2009

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Posted on Jan 02, 2017

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Check the help link mentioned below to troubleshoot the problem: ------

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------
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