I just installed a new 408, a new tranny, new DTE Rear-End, new stall, new suspension and a new fuel system. Car ran great for about 5 miles, now it stalls. I'm running open headers, the rear O2's are turned off. Could me being opened headers be the reason my car stalls after about 20 sec. of idleing, of as soon as you go to put it into gear..?

 

Add more air into your desired airflow table for Drive. This will help a little with the issue you are having. I assume the car was tuned in Open Loop due to the open headers?

 

Open headers is no good.Fresh air goes across the 02's and really screws up the car.You need atleast 24" extensions.

 

Thanks guys for your replys. I am getting the exhaust built as we speak. It will all be installed this Thursday. I guess I may have to replace the O2's. They are new, but I'm thinking that I may have toasted them. The car ran great for 20 min. Then I drove it for about 5 miles. That's when the miss and poping started. Then the stalling problem came soon after. The opened headers may be the cause. I sure hope so. The is killing me...