67Firebird455

iTrader: (27)

Failed... Visual passed, but for some reason, the DMV has my 02 Z71 tahoe set to perform the "Idle, and 2500rpm" test, not on the rollers running 15mph, and 25mph (which I anticipated). Anyway, idle numbers ended up failing me on my new motor with 4000 miles.

Idle
Hydrocarbons (Parts per million) - Max(100) / Ave(26) / Measured(90)
Carbon Monoxide - Max(1.00) / Ave(0.00) / Measured(1.04)

2500RPM
Hydrocarbons (Parts per million) - Max(180) / Ave(11) / Measured(11)
Carbon Monoxide - Max(1.10) / Ave(0.10) / Measured(0.08)

So idle is killing me, and 2500 is the best thing ever. Pretty damn good so... Is it just tuned a little rich at idle or something?

sreve

iTrader: (3)

i'm betting that cam is the issue. you should try search and look your regional forums.
i have read with great interest about a 224 cam passing a sniff test in cali. some people claim to have done it. with the overlap idle is going to be rich. one of the best ones i read on here was an F-body with a 224 that had the air pump runnig all the time lmao.

i realize you do not have an air pump

67Firebird455

iTrader: (27)

I posted on the western section, and as for the 224, that's why I got the 114, to reduce overlap. Could just be the tune that is off. @ 2500 the numbers were awesome, just need to get the idle leaned a hair and it'll be golden. Wish I had an AIR pump (doesn't have EGR or AIR) that I could leave on during the test, that'd be funny, lol.