I was running pig rich the past couple of days to the point where it'd be dumping too much fuel in at idle and just die out when I was sitting at lights. I hooked winaldl up today and was tagging .950 just driving around normally, but my blms were constant at 128 the whole time. I pulled the fuel pressure down a lot, aucutally to the stock setting which was dead center on the regulator and my voltage dropped to about .800 driving around, but spikes to .950 quite a bit still, and this isnt even under wot. My blms dropped to between 108 and 124 most of the time, which would imply a lean condition, but my O2 sensor still tells a rich condition?

Any ideas? Thanks!

 

Here's a big question: by WinALDL, is the ECM going into closed loop mode (or learn mode)? Try dropping the fuel pressure even further - the BLMs should, theoretically, shoot above 128 to signify that the ECM is compensating by adding pulse width to the injectors.

 

Actually, a number less than 128 indicates you're running rich, and vise versa. 108 is extremely rich.

 

So its still that rich with the fuel pressure at stock setting?

I dont have egr anymore, I dont think it goes into closed loop does it?

 

I'm not sure if it goes into closed loop or not. There should be a flag data for it. Once your engine gets to operating temp, check the flag data in WinALDL.

 

It'll still go into closed loop without EGR. Definatly check the flag data to make sure it's in closed loop. I would still replace the o2 sensor with a heated version if you're into burning eproms .