Tech Support Forum - View Single Post - 1991 s-10 blazer won,t idle after it warms up

**pat mcgroin** · 05-13-2009, 07:53 AM

I would suggest to try it with a scanner plugged in.
The computer goes from closed loop (predetermined settings) to open loop about that time.
In open loop it is using any readings it gets from the engine to determine how to set it self
It is possible that the throttle posistion sensor or something else isnt giving a correct reading and the scanner may help to determine which one.

Many auto parts stores will let you borrow one for just a deposit.

05-13-2009, 07:53 AM	#2 (permalink)
pat mcgroin TSF Enthusiast Join Date: May 2009 Location: Toledo Oh. Posts: 603 OS: XP Professional SP2 Vista Ultimate SP2	Re: 1991 s-10 blazer won,t idle after it warms up I would suggest to try it with a scanner plugged in. The computer goes from closed loop (predetermined settings) to open loop about that time. In open loop it is using any readings it gets from the engine to determine how to set it self It is possible that the throttle posistion sensor or something else isnt giving a correct reading and the scanner may help to determine which one. Many auto parts stores will let you borrow one for just a deposit. Last edited by pat mcgroin; 05-13-2009 at 07:54 AM.