having the same problem . . with my truck dude.. ever since the cam swap . . im getting a leak.. i keep getting code P1174 . .I'VE Checked everything.. and could not find anything.. does it throw a code at WOT?

 

Narrow band sensors are typically only accurate from .400V (15.0:1 AFR) through .800V (14.2:1 AFR). So a numerically lower number equals a higher air to fuel ratio.

 

Lower the number, leaner it is. Once you get around the leak, the o2's should go to 0 or close to it.

 

Yeah, that's what I just said two hours ago! They'll go to 0, but that number isn't accurate to use for tuning!

Bust out the wideband!!

 

I'm not trying to tune it... I'm trying to find an air leak

 

With the size of cam that he has IMO the wideband is useless at idle...

 

He just left my house, it is idleing like a champ now!

 

what was wrong?

 

Decrease the Desired Airflow table, increased the idle areas on the MAF table, set the O2 switch points back to stock, increase the Startup Airflow Friction table, Decreased Startup Airflow Decay P/N and Gear, Increased Startup RPM Decay P/N and Gear, etc...

 

Corey, you are THE MAN!

Drove it all the way home, parked it for a second, started right up perfect.

I owe you big time (again haha).