1992 Honda accord EX 150K ..Idle jumps up & down ( 800-1900 rpm) in
park & or neutral. Once tranny is engaged it stops racing up & down,
but is still too high (about 1200 rpm) Dealer can not diagnose..
After problem occurred I replaced the following. New plugs,
wires,coil,cap, checked EGR and it seems to work fine,put in brand new
$50.00 O2 sensor,just did the IAC= idle air control valve ( from junk
yard since new one is 275.00). pulled fuel rail & cleaned the
injectors , replaced the rubber gaskets that seat with the injectors.
No visible or detectable vacuum leaks
Again when a load is on transmission it stops racing but still idles
to fast. This is killing my MPG and sounds really bad LOL.
Any help is very appreciated...I am out of ideas
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