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Tony Curcio · 03-31-2016, 12:15 AM

This might be the anti-knock sensor, which will retard the timing as the engine gets hot, then returns to normal after a cool down. If you don't want to spend $ on a programmer or aftermarket ECM, you might get away with simply running higher octane fuel.

Maybe add a switch that lets you run the electric fan at will, especially when the engine is off.

03-31-2016, 12:15 AM	#4
Tony Curcio Member Join Date: Mar 2002 Location: West Chester, PA Posts: 271 Likes: 1 Liked 4 Times in 1 Post	Re: stock gm computer cars This might be the anti-knock sensor, which will retard the timing as the engine gets hot, then returns to normal after a cool down. If you don't want to spend $ on a programmer or aftermarket ECM, you might get away with simply running higher octane fuel. Maybe add a switch that lets you run the electric fan at will, especially when the engine is off. __________________ Tony Curcio 1860 STK