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Sudden bad idle on a '87 EA82 GL Hitachi carb'd SW: why?
Posted 24 January 2005 - 02:17 PM
Drove car home from work, operates nicely, 1/2 a tank of gas. Park and wash. Restart later: idles high in choke mode, but barely holds an idle after warmup, instead holding at about 3-4hundred rpm. Later, cannot even hold this and dies (must rev. to keep from dying). Level, constant pressure on gas pedal produces uneven idle, but not a constant miss, just rough and uneven.
What I've done: Replaced gas filter @ tank, plenty of gas flowing from gas tank. Removed gas cap and ran: no luck, still bad. Filled tank with 92 octane. Checked choke cycle; carb butterfly returns to normal fine. Gumout down barrel. Inspected and replaced plugs (all OK). Air filter fine (ran with cover off: problem persists). Vaccum hoses all connected. Good (~12+v) current return at battery (no electrical problems whatsoever). Fuses all check OK, including those in eng. comp.
Have not checked gas flow at carb. Cannot find anti-diesel valve. Cannot check timing (no idle). Also, idle would increase or decrease depending on selection of Defrost/Heat using buttons prior to this problem (never caused under 800 idle however).
Anything obvious I should try? What could possible have happened to turn the car from idler to this?
Posted 24 January 2005 - 03:18 PM
Posted 24 January 2005 - 06:55 PM
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