Question about 1992 Buick Regal
There not suppose to be any adjutments made for idle. high idle is usualy caused by a problem the computer is trying to confresate for something by keeping idle high ,check see if check eng light is on .check for bad coolant sensor corroted batt cables,poor battery connections, 02 sensors functions.if you really want to take down idle there is a small screw on throddle body in some model look for a air screw ,a large straight edge screw near air intke or on throddle body .but i dont recomend adjusting idle unless you ve fixed the problem that causing the pcm to raise the idle to prevent stalling of the eng
Posted on Aug 28, 2010
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Posted on Jan 02, 2017
try checking air cleaner box to be sealed or dirty air filter and try to clean mass air flow sensor also check for dirty air intake only clean mass with special mass cleaner . also look for vac leaks and fuel pressure .
Posted on Jan 28, 2010
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Mar 03, 2013 | 1995 Chevrolet Suburban
Feb 09, 2018 | 1995 Ford Escort
Here is the common cause of surges, cold stalls, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours.
To correct this problem Buy a can of throttle valve cleaner (it is made by CRC) from the local auto parts store, NEVER USE CARB CLEANING SPRAY, IT DESTROYS THE ANTI-STICK TEFLON COATING, spray it into the air intake through the throttle body of the engine until you have used about half the can, you will need to hold the idle up while you do this, it will try to stall, after this shut the engine down and disconnect the Negative (-) battery cable for 5 minutes. The intake is now clean, if you continue to have the idle speed control problems you may need to seek the help of a professional.
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