I got a code 44 (Lean Exhaust.)

It throws the code when my car is idling (Around 550 RPM's, when you start noticing the Cam Lope.)

Any ideas? The O2 sensor is new.

 

are u using a custom chip, if not, im sure that is causing you to run lean. Might want to try increasing the fuel pressure and messing around with the timing.

 

Nope, stock chip from a 350 TBI Caprice.

12* BTDC at idle with the computer jumped.

13lbs of fuel pressure.

350 Injectors.

I am also getting 5-10 mpg.

 

custom chip, im sure thats all you need.

 

I'll have to get winaldl and record the data and have tbichips do it.

 

Have you looked at the spark plugs to see if its actually running lean or that the 02 sensor is whacked tell the computer that its running lean when its not and the computer is dumping fuel to compensate causing your 5-10mpg. No amount of chip work will cure inaccurate sensors. The winaldl will help spot some flakey readings from them though. A vacuum leak could also aid in your problem. Can't rule out the CTS (coolant temp sensor) either. But I would say that its one of those problems rather than the chip. Yes you could gain some power from a tuned chip but it should run a hell of a lot better than that with your chip.

 

Found the problem. The headers melted the connector and wire for the Oxygen Sensor. It was telling the car it was lean and it richened it to hell. I figure it did it on tuesday. The mileage wasn't too bad, until the codes started flying, and the mileage went to the floor.