The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 89 S10 4.3 Need help troubleshooting TBI/IAC Idle issue

ChevyTech · 08-14-2014, 01:13 PM

Carburetor cleaner can damage the IAC in a hurry.

They are a high failure part anyway.

They wear.

Drive it a bit to get a self relearn after the new IAC is installed.

Make sure the tip is not out too far when you install the new IAC.

The tip of the pintle must not extend more than 28mm which is 1.10 inches from the shoulder toward the electrical connector, by the threads.

08-14-2014, 01:13 PM	#33
ChevyTech Registered User Join Date: May 2004 Location: Minnesota Posts: 4,620	Re: 89 S10 4.3 Need help troubleshooting TBI/IAC Idle issue Carburetor cleaner can damage the IAC in a hurry. They are a high failure part anyway. They wear. Drive it a bit to get a self relearn after the new IAC is installed. Make sure the tip is not out too far when you install the new IAC. The tip of the pintle must not extend more than 28mm which is 1.10 inches from the shoulder toward the electrical connector, by the threads. __________________ For those of you that are wondering why you are not getting replies to your thread: Did you give the model, year, engine, fuel system type, and transmission information? If it is modified from what came stock from the factory, let us know that too.