O2 Questions??
O2 Questions?? I got the car dynoed today and it pulled 310rwhp on the motor. 99 Z28 M6 It has Mac headers, lid, Offroad and Hooker Catback with the stock 3.42 gears. It seems to be running really rich in the upper Rpm's and blew black smoke from 4500 to 6000 on the dyno. Wouldn't a bad O2 set a code??? The back of my bumper cover also has black soot near the exhaust pipes. The car did not smoke before I installed the headers. Anyone seen a similar problem (Very Rich mixture)??? Suggestions??
Re: O2 Questions?? [quote]Originally posted by cantdrv65:
<strong>I got the car dynoed today and it pulled 310rwhp on the motor. 99 Z28 M6 It has Mac headers, lid, Offroad and Hooker Catback with the stock 3.42 gears. It seems to be running really rich in the upper Rpm's and blew black smoke from 4500 to 6000 on the dyno. Wouldn't a bad O2 set a code??? The back of my bumper cover also has black soot near the exhaust pipes. The car did not smoke before I installed the headers. Anyone seen a similar problem (Very Rich mixture)??? Suggestions??</strong><hr></blockquote>
ttt
<strong>I got the car dynoed today and it pulled 310rwhp on the motor. 99 Z28 M6 It has Mac headers, lid, Offroad and Hooker Catback with the stock 3.42 gears. It seems to be running really rich in the upper Rpm's and blew black smoke from 4500 to 6000 on the dyno. Wouldn't a bad O2 set a code??? The back of my bumper cover also has black soot near the exhaust pipes. The car did not smoke before I installed the headers. Anyone seen a similar problem (Very Rich mixture)??? Suggestions??</strong><hr></blockquote>
ttt
TECH Regular
Joined: Nov 2001
Posts: 489
Likes: 0
From: Out of Texas, into Tucson, AZ
Re: O2 Questions?? probably rich. scan or wideband it. lots of possibilities but none (likely) are really huge. battle is to FIND what it is instead of just changing ****
scan it O2's and ltrms
scan it O2's and ltrms
