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MPFI Idle screw??????

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My roommate has an 87 GL10 turbo wagon And I was going to turn the idle down but I for the life of me cannot find where to do it at. Does anyone know where it is located, cause I sure don't:)

 

Jeff

My roommate has an 87 GL10 turbo wagon And I was going to turn the idle down but I for the life of me cannot find where to do it at. Does anyone know where it is located, cause I sure don't:)

 

Jeff

 

Stand at the front of the car and look straight, directly down at the Throttle body. Behind the throttle bore, at the rear left corner is a screw head in a recessed hole. A bit smaller than a dime in diameter. Right next to the Fast Idle Solenoid. IIRC screwing it in lowers the idle.

 

 

****Do NOT mess with the painted stopper screw on the throttle shaft.**** It is set at the factory. If adjusted the throttle plate will either close too far or not far enough. The ECU needs that closed throttle position to be a excactly right to regulate the idle.

 

 

 

*note, If you're problem is a fast high idle(warming up idle), the fast idle adjustment screw is on the rear of the throttle body base just under the fast idle solenoid. It is adjusted from the *horizontal*, so you have to look for it from the rear, and probably use a stubby screwdriver.

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That is the one i turned but nothing happened. I wonder if it is kidna gummed up or something. I'll take a look again but I think I was on the one you are describing.

 

Jeff

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