PCM Diagnostics & Tuning - Newbie Wideband Question.
07-13-2009, 04:12 PM
So I have spent the better part of the weekend re-wiring up my LC-1. I have it on a 98' C5 w/ Dynatech Headers simulating the driver side front. I have my grounds on each head, with the heater(blue wire/heater wire) by itself on the passenger head. I had the grounds on chassis prior, but readings were all over the place. Now I'm still getting funny readings when it first starts up showing anywhere from 18.0-22.0 at idle and sometimes cruise. After 5 minutes or so of driving it settles to around 14.0 which seems correct. I've done free air cal and complete cal multiple times and still shows the 20+ on start up idle, cruise. Is this normal? Anyone have a normal looking log that I can look at, so I can figure out where I'm suppose to be?
I'm learning so please forgive my ignorance.:engarde:
07-13-2009, 08:52 PM
Do you have emissions still?
07-13-2009, 11:32 PM
As in my Cats? I have hi-flow.
I do take emission test.
07-14-2009, 02:06 PM
07-14-2009, 10:24 PM
Well I did notice today that something makes like a hissing noise, like a valve closing, not sure if that's the egr valve, and then my readings go normal.
07-15-2009, 12:03 PM
Read up on what the A.I.R. system is used for on an F-body. I block it off along with EGR and tune it out personally. Being Mr. Emission you may keep it. Shouldn't be tuning until car is warmed up anyhow. Just ignore until your warmed up and in closed loop operation.
07-15-2009, 03:37 PM
Thanks I actually have been reading about the functions of EGR and PCV. I have EFI coming so my next project is to pull those out.
Yeah after warm up things are great. Thanks for the input!
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