definatly a lean miss, well could be ignition oh wait its a rich miss

[Jason Weir]

Ok here is the deal 747 ECM....V6 chip, I have what I believe to be a
lean miss at idle.  here is what leads me to this assumption.

1  I have a miss at idle
2  the miss gets less as the rpm goes up, eg. if I hold it at 1000 rpm
its not as bad as it is at 750 and at 1500 its even less noticeable
3  during warm-up there is no miss at all
4  the miss goes away totally during acceleration

but it might also be an ignition miss because, correct me if I am wrong
but if I have an ignition miss there will be unburnt oxygen in the
exhaust making the ecm think that the AFR is lean and correspondingly
enriches it, probably making the miss worse...my plugs indicate a rich
condition but I'm not sure if that occurs at idle or cruise.  BTW normal
cruise RPM is less than 2000 rpm, 70 mph in high gear is only 1800 rpm.
if its an ignition miss where is it during warm-up and acceleration (ok
I might not notice it during acceleration)

I believe that the AFR at idle is from 0x5f5 through 0x5ff and is by
temp and the correction factor is .113, something tells me this isn't
correct because of the funny values I am getting

I also believe that AFR vs. Temp is at 0x459 through 0x468 also by temp
with the same conv factor of .113 again I'm getting funny numbers here

where am I to look next... thanks Jason

--
Jason Weir
88 Wrangler - 258 Chevy TBI
Fayetteville, North Carolina
http://home.att.net/~jweir
mailto:jweir at worldnet.att.net