86 Accord - post warm up idle stall

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bg - 28 Oct 2007 19:58 GMT

Hi All,

Advance thanks for any suggestions.

My 86 Accord (manual / AC) warms up OK on its own. Once I push on the
throttle and get it out of the warm up process the car simply dies unless I
keep the RPMs up about 1500. A slow shift is a dead engine and as I drive in
a hilly urban area this makes for some complex driving gymnastics.

Have replaced the fuel filters and sprayed some carb cleaner. Don't want to
start replacing things randomly if I can avoid it.

Thanks for any thoughts here.

-RA

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Matt Ion - 28 Oct 2007 21:59 GMT

> Hi All,
>
[quoted text clipped - 9 lines]
>
> Thanks for any thoughts here.

99% chance you've got a vacuum leak. Listen for a hissing, whistling or
sucking sound (other than from the carb venturi). If you can't track it
that way, try starting around the carb, where the vacuum lines take off,
and gently pinch off each one to see if it affects the running. If you
find one that does, follow it outward until you find the leak. If it
splits out, repeat the pinching process on each branch.

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RWD - 28 Oct 2007 22:46 GMT

>> Hi All,
>>
[quoted text clipped - 18 lines]
> outward until you find the leak. If it splits out, repeat the
> pinching process on each branch.

Especially check vacuum lines 8 and 33... those are the usual suspects
when my '89 LX starts to exhibit those symptoms.

Good luck, Richard

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JP - 29 Oct 2007 03:47 GMT

> Hi All,
>
[quoted text clipped - 14 lines]
>
> -RA

I had something similar several years ago on my 86 accord. There is an idle
shutoff solenoid on the carburetor that is intended to keep the engine from
dieseling. If it fails it will result in the engine failing to run at idle
speed after warming up. It's number 30 in the diagram at the link below.
You can verify if it is working by checking for a clicking sound when
connecting to 12V source.

http://www.hondaautomotiveparts.com/auto/jsp/mws/prddisplay.jsp?inputstate=5&cat
cgry1=Accord&catcgry2=1986&catcgry3=4DR+LX&catcgry4=KA4AT&catcgry5=CARBURETOR

JP

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Matt Ion - 29 Oct 2007 07:51 GMT

>> Hi All,
>>
[quoted text clipped - 23 lines]
>
> http://www.hondaautomotiveparts.com/auto/jsp/mws/prddisplay.jsp?inputstate=5&cat
cgry1=Accord&catcgry2=1986&catcgry3=4DR+LX&catcgry4=KA4AT&catcgry5=CARBURETOR

There's your other 1% :)

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