After replacing the throttle body sensor, thinking that was the problem the idle on my truck got higher. what should I do to fix this issue?
Clean the throttle plate an bore , an the idle air control valve an air passage .
The purpose of the IAC valve assembly is to control the engine idle speed while preventing engine stalls due to changes in the engine load. The IAC valve (1), mounted in the throttle body assembly, controls the bypass air around the throttle valve (2). By moving a conical valve known as a pintle (3) in toward the seat, in order to decrease the air flow, or out away from the seat, in order to increase the air flow, a controlled amount of air moves around the throttle valve. If the engine speed is too low, more air is bypassed around the throttle valve in order to increase the RPM. If the engine speed is too high, less air is bypassed around the throttle valve in order to decrease the RPM. The control module moves the IAC valve in small steps, called counts. These can be displayed by a scan tool, which plugs into the data link connector (DLC).
The control module calculates the proper position of the IAC valve during idle based on the battery voltage, the engine coolant temperature, the engine load, and the engine RPM. If the RPM drops below specification and the throttle valve is closed, the control module senses a near stall condition and calculates a new valve position in order to prevent stalling.
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Change spider fuel injectors
I know this sounds nuts but I just did this to my Granddaughters truck and it works. Turn the key off open the door for 90 seconds close the door turn the key on but do not start the truck, press the gas pedal to the floor three times and shut the key off and wait 10 or 15 seconds and start the truck. This will reset the idle air control and should let the truck idle ok.
Your right, this sounds completely NUTS.
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SOURCE: High Idle Issue
Sounds like the idle speed control motor is stuck, this could have been caused by the cleaning.
SOURCE: high idle will not lower
sounds like you have something blocking the linkage or the throttle body isn't closing totally or you have a air leak.
SOURCE: surging and high idle on 94 silverado
If your idle is going from 500rpms to 1000rpm's fluctuating at and idle your EGR valve is probably carbon up and needs cleaned or replace.
SOURCE: Chevy truck '02 surges between 45 and 55 mph
you should change the tps( throtal position sensor) this can cause that problem
SOURCE: My 93 chevy 1500 4.3 is pouring to much fuel, I
were the injectors replace? 4.3l engines are know for messed up distributors
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