Anyone have any idea what a "Fuel Brain" is? I'm still in my quest to make my car run smooth, and after changing out just about every sensor and not fixing it, I came to a website where it said this:

"Dr. Bob's post on this was very enlightening... wanted to add my own experience... I recently had a fuel brain crater on me, and it caused exactly the problem dr. bob was advising the other lister on, namely triple the regulated emissions of HC... we tried everything else BUT the brain, with almost no results, and I was told by an old timer at a dealership shop that the oxygen sensor failing would NOT cause HC readings to triple... so, after doing all the other stuff, like mass flow meter/plugs/wires/rotors/caps/etc, we stuck a new brain in there and PRESTO! instant compliance, with readings below half of what is necessary in Harris County/Houston, Texas. Turned out my lambda sensor worked fine after all...we unplugged it during the post brain test and it did change emissions for the worse, plugged it back in again and they went back down...

I'm no expert like dr. bob (I had to read his post three times to get it. My brain is failing too) but if your emissions are three times what they should be in an electronic injection car, and it has 100,000 miles or thereabouts on it, your fuel brain is probably dead. I'm told most of them fail at around this mark. I am also told they have a default setting they go to when they fail which is very rich to ensure the car will run under all conditions and that this is what causes the emissions to go so high."

Anyone have any idea what they are referring to as a fuel brain? An ECU, perhaps?

 

They must be referring to the car's computer - ECM, ECU, whatever you want to call it.