Running Rich with 450s???

[DSM_ThuNDeR]

Hey, anyone tell me what to do to make my fuel mixture a little more better? Im running a GM-Maft with 450s. Every dial is set to zero (version 1.3). Im using v2.5 DSMLINK. Please help. I have included a log file. What Im mainly concerned about is getting my idle-2.5k RPMS right for now.

 

[snowborder714]

ECMTuning, Inc.

Watch all the videos, follow along, and then post back the results.

If your gauge isn't matching the logged AEM input, check this page out.
http://www.dsmlink.com/wiki/aemwb

 

[e_miller81]

I would check your o2 sensor to make sure its reading correctly. That would cause the car to run rich on the 450's.

 

[Kod]

I would check your o2 sensor to make sure its reading correctly. That would cause the car to run rich on the 450's.

I have the same exact issue with my car, the upstream O2 is reading correctly but the downstream O2 is telling my car its running lean so I'm burning rich & dumping way more fuel than I should be.

I tested it and right now I get 210 - 235 miles out of a full tank

 

[e_miller81]

I thought that the front o2 really controlled the fuel mixture. Have you changed out the rear o2 and to see if that made a difference? I don't know what else would be making run rich besides having a bad o2. That has to cost a pretty penny if your only getting 2xx on a take of gas.

 

[Kod]

My friend has a snap on scanner. It reads my down stream o2 is a constant 0.020. Ir never changes. The upstream does fluctuate

 

[motozachl]

log mafRaw, combFT, and closedLoop

 

[Kod]

Changing the O2 sensor tonight then I'll post my engine data afterwards.

 

[DSM_ThuNDeR]

The problem guys is that this is a BRAND new o2 sensor. I will try to make another log in a few minutes. What else should I log?