I went to LG Motorsports today with the hopes of getting different results, but they got basically the same readings.
Here's the first run again at RPM:
And these are the results from LGMotorsports (on the first graph, bottom reading is with TC unlocked, top is locked):
And another:
LG pretty much said the same thing (but for $85 instead of $25 at RPM): bad A/F ratio and it's going to cause problems. So I'm driving around babying it afraid to get into it at all.
<div class='quotetop'>QUOTE(farmtruc @ Jun 27 2006, 09:45 AM) [snapback]56403[/snapback]</div>I asked about doing it before the cats and they said it was such a small difference, it didn't matter. If it helps any it was a DynoJet 1 and they did the runs in 3rd gear. I know you're too thorough to miss anything Allen, so believe me, I don't think you "missed" anything. I'm just not in the know enough on A/F ratios and stuff to know what to do, what to ask of them, etc.For what it's worth, I never use my tail pipe a/f device because it's always a little off and isn't as consitant as the O2 bung reading.
I also found out on mine, that the dyno reads about .5 leaner than the street.
Bring it back down if you can't find a shop to dyno it and we'lld double check it, but I'm sure it's fine.
Also, you'd be surprsed that GM doesn't allow their trucks to richen up until about 5K rpms, doh. If PE delay isn't turned off, which yours is, then most trucks will not richen up until the top of second gear.
I know the '06's wont' until about 4900rpms.
let me know,
allen
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