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How do I fix idle control circut malfuntion - Cars & Trucks

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  • Kenny dyer Apr 16, 2015

    How do I fix bogging down in my 86 nissan truck with z 2.4. Push gas half way fine any further down it falls on it's face.



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If it is a circuit, than option are limited by a service manual
i would look for the throat control arm, or cable, looking for screw of nuts that you turn to increase or decrease the idle.

you will still need a service manual to know which way to turn the turn buckle
if you have carburetor the piece that open the intake will be where that adjustment would be, again you would need a service manual to make those adjustment.

you mite find a manual on line, the library, a friend, you could try this site. idle contron
/fix idle control circuit malfuntion

Posted on Apr 16, 2015


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Egr low circut malfuntion

  1. Check the EGR control system and EGR valve with the engine fully warmed up and running [engine coolant temperature over 76 °C (170 °F) ]
  2. With the transaxle in neutral and the throttle closed, allow the engine to idle for 70 seconds .
  3. Abruptly accelerate the engine to approximately 2000 r/min , but not over 3000 r/min .
  4. The EGR valve stem should move when accelerating the engine. Repeat the test several times to confirm movement.
  5. If the EGR valve stem moves, the control system is operating normally.
  6. Remove the vacuum hose from the EGR valve and plug the hose end.
  7. Connect a hand vacuum pump directly to the EGR valve
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