I am new to prom burning and my car is running lean. It also will not go in to closed loop even with a stock program. My car is an 86 Iroc TPI With a 355 10.72/1 compression with a Mild cam. I have success burning chips and getting the car running better, but it will not go in closed loop or run rich. Please help!

 

hook up a wideband. The factory o2 can be very misleading. If you have used one then post your a/f ratio charts. Make sure to post the lean area (gr/sec+rpm) AND what you are doing to change the fueling..

 

I'm not sure hooking up a wide band is the answer here. Let's start simple.

Take a data log and look at what your O2 is doing while you're actually driving the car. If, when the engine is at normal operating temp (~200 degrees in most cases), the O2 sensor isn't going "up and down" (regularly crossing the 500mv thresh), that's most likely why your car is not going into closed loop.

 

thanx guys. I \that was helpful, and I figured it out!!!