What would cause this... I know the car is pig rich because I put it on an exhaust gas analyser and Hydrocarbons were at 3000ppm but the computer was reporting BLMs of 133 which the computer was seeing a lean condition and adding fuel??? Car idles terrible and is down on power. I am using a modified ARAP bin with SVO 30lbs injectors with the injector constant set to 32lbs..............WTF?????Is it the MAF sensor...O2 sensor????

 

Burning oil ?

That will produce HC's.

 

try checking yr o2 sensor valtage. should be toggling between .450 and .650 at idle. if it not replace and test agian. also check for exhuast leaks before the sensor.

 

That's my thoughts. In fact, if your O2 sensor is kind of old, I'd just replace it. I have found on a number of vehicles that often the O2 sensor MAY not set an SES code, but it is no longer working properly.

In fact, often the SES code is JUST when the O2 sensor has finally "overstepped" the "pre-defined" limts by GM. Often the problem is occuring even before it "oversteps" these limits.

Also, the exhaust leaks do cause havoc to occur. I had an exhaust leak after my "cats" that affected my exhause (and O2 sensor) enough to cause the car to run poorly.