Did two rounds here and this is what I got........
Start 5min later
999 0.0 585-600 0.0
12-13 MAF 15
25-30 SP 29
2.7 LP 1.8
3.3 RP 3.4
- DTC -
0 MPH 0
128 LBL 126-128
160 RBL 160
16 CEL 16-18
128 LIN 127
128 RIN 193
660 O2L 289-302
999 O2R 550-572
92 ATS 90
121 CLT 184
.76 TPS .64
01 TPP 0-01
1000 RPM 1150
160 IAC 149
18.5 MAP 16.5
bar 30.6

This is a 383 with a cc306. The obvious things I see is that the right bank is lean and my iac is maxxed out. Can the iac cause all this and what possible problems do you all see. Thanks.
Rob

 

ttt

 

After 5 minutes, did it go into closed loop? Doesn't appear it did if the O2 readings are not cycling like they are suppose to. Your data shows them to be fairly steady. Yet your integraters are moving, so it should be in closed loop. Something is odd, unles its just the way you typed the data.

What is your idle speed programmed to be?

Be careful.... its pouring so much fuel into the right side that you could be washing down the cylinder walls and diluting the oil.

I'd guess you've got a false lean.... misfires, exhaust leak before the O2 sensors, bad sensor, valves not adjusted correctly on that side.

 

If that was from a cold start.. been sitting for at least 5 hours.. then that O2 sensor thats reading .999 is not working right.

On a cold start the O2s should be .450mV because they are too cold to function. .450mV is in teh middle of thier opporating range with values approaching 0mV indicating lean and 1V or .999mV indicating rich... this ONLY when they are HOT.

 

Are you sure you don't have an exhaust leak that's freaking out the O2 sensor?

 

Here is some more info. It is tuned by madz28 for the cam and setup.
The injectors are 28#s but I do have 37#s to put in later, I wanted to start it up and get it idling properly first. I swapped the 02s today and the right is still giving the 999 on start up, didnt get a chance to get it into closed loop due to a rain delay. I am running wide open headers with no y-pipe right now would that have any affect on the 02 readings? Did not see any exhaust leaks evident. Right now to me it appears I need to get the iac counts down and then go from there???? How much could the iac being maxxed out have an effect on the motor? Golen did the valve lash and everything so I have made no adjustments there. No codes or knock. Thanks for any more info.
Rob

 

Did he tune it for 28's or 37's?

Are your O2 sensors in the collectors of the open headers.... that will screw the readings up quite a bit. But ususally, it will read "lean" and pour in fuel the engine doesn't need. Running it that way can potentially damage the engine if it runs rich enough. And you may "get it idling" but that will be meaningless when you put the Y-pipe on it and isolate the O2 sensors from ambient air.

I'm trying to help you, but you didn't answer the questions I asked... what is the programmed idle speed? Did the O2 sensors start to cycle over a broad range after 5 minutes (0xx-9xx mVolt) or did they stay in the narrow ranges that you typed? It very hard to help if you don't respond.

 

The idle speed was set by madz28 875/900 gear/neutral. The programming was for the 28lbers. the o2 seem to stay in that narrow range I typed at idle, but i have not let it run longer than a few minutes due to the readings from the scanmaster. Idle does seem better now (not as high) but iac still maxxed and blms still split. NO codes. Y-pipe tubes are on but not the two into one piece. Jet-Hot longtubes/ory. 02s do move with throttle and blms seem to even out a bit. Checked plug #4 and looked good not wet or lean looking. Oil did not smell like gas or anything on dipstick. Thanks for the help and I will try to provide as much info as possible. The car will be scanned by datamaster hopefully on monday. Thanks again.
Rob