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fluctuating idle

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Old 01-18-2007, 11:42 AM
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Default fluctuating idle
i have an 89 s 10 blazzer with a 4.3 tbi. the engine idle fluctuates from low to high. at times it will stay at a reg idle, but not for long. when put into gear(auto trans) it wants to stall. to keep it from stalling, you have to pump the accelerator. i have replaced theiac, o2 sensor, and the tps but with no success. the egr valve has been removed and cleaned and all the vacum lines appear to be ok.any sugestions on this matter would be appreciated.
 
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Old 01-18-2007, 12:01 PM
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Default RE: fluctuating idle
Try checking the TCC (torque converter clutch) Solenoid
also known as Trans Control Solenoid

I have seen this part do just as you stated your engine is doing many of times.

Good luck
 
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Old 01-18-2007, 12:06 PM
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Default RE: fluctuating idle
I willdo that. thank you for your help
 
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