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1992 B2200 Odd Bad Idle Symptoms. Any Ideas?

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Old 01-13-2019, 01:04 PM
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Default 1992 B2200 Odd Bad Idle Symptoms. Any Ideas?

  • Sometimes the truck idles fine when car is warmed up (after thermostat cycles). idle dips low then rises and catches the motor from stalling. Usually I just have to keep tapping the gas at a stop or while slowing down in neutral.
  • When thermostat temp is between hot and cold, like if I let it sit for an hour or two after a drive, or I drive off before it gets up to temp, no idle.
  • Whenever the car is fully warm, idle is around 900 rpm then rises to 1500rpm if iím at a long light.
  • sometimes I have zero issues at all, but usually the truck has a super rough idle when coming to a stop (especially when it is very cold out) so I have to keep tapping the gas while braking or stopped.
i have a brand new fuel pump (yes I put in the cam spacer), and have inspected all of the vacuum and fuel lines for any leakage. Could have missed something though. I have the complete stock setup right now, I mean EVERYTHING. Just changed the points, plugs, wires, timing belt, tensioners, getting good voltage from batt/alternator. Any input? I can live with the constant gas-tapping but itís pretty annoying.
 
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Old 01-17-2019, 08:06 AM
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Update: i cleaned out the EGR valve and now the truck idles well after warming up a little. still has some issues when in between warm and cold, except when the choke/high idle kicks on first start of the day.
 
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